{"title":"Astronomik","description":"\u003csection class=\"collection-description\"\u003e\n  \u003cp\u003e\n    Astronomik is a highly respected manufacturer of premium optical filters for\n    astronomy and astrophotography. Designed and produced in Germany, Astronomik\n    filters are known for exceptional transmission, precise bandpasses, and\n    outstanding optical quality.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This collection includes narrowband, broadband, light pollution reduction,\n    and specialty filters engineered to deliver high contrast, accurate color\n    reproduction, and minimal halos. Astronomik filters are trusted by amateur\n    and professional astrophotographers for consistent, repeatable results.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Whether capturing emission nebulae or improving visual observations, Astronomik\n    filters provide the performance and reliability required for demanding\n    astronomical imaging.\n  \u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"astronomik-oiii-12nm-ccd-maxfr-1-25-m28-5","title":"Astronomik OIII 12nm CCD MaxFR 1,25'' (M28,5)","description":"\u003ch1 data-mce-fragment=\"1\"\u003eAstronomik OIII 12nm CCD MaxFR 1,25'' (M28,5)\u003c\/h1\u003e\n\n\u003cp\u003eOur 1,25\" (M28,5) filters fit perfectly in all 1,25\" (M28,5) filter wheels of the brands ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian and Atik.\u003c\/p\u003e\n\n\u003cp\u003eThe orientation of the filter in the filter wheel does not matter. It does not change the optical performance.\u003c\/p\u003e\n\n\u003cp\u003eThere is an ever growing demand for filters suitable for extremely fast optical systems like Celestron´s RASA the Epsilon Astrographs made by Takahashi.\u003c\/p\u003e\n\n\u003cp\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters are perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha) and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.rothervalleyoptics.co.uk\/user\/products\/productimages\/maxfroiiigraph.JPG\"\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eHighest transmission:\u003c\/b\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a extremly high contrast, minimized stray light, no halos and needle-sharp stars. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to a awesome final image!\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\nFor 12nm MaxFR filters this means a unlimited usability from f\/1.7 to f\/1:8 and about 85% of the maximum transmission at a f\/1:1.4 as guaranteed.\u003c\/p\u003e\n\n\u003cp\u003eFor 6nm MaxFR filters this means a unlimited usability from f\/2.2 to f\/1:8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003cbr\u003e\nFor maximum contrast the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eImaging with Narrowband-Emissionline Filters\u003c\/b\u003e\u003cbr\u003e\nIf you have to observe from light polluted sites (like most of us...), imaging with narrowband-emissionline filters is the best way to take great images, as all kind of light pollution can be blocked very effective! Normally an H-alpha filter should be your first step into this amazing field of astrophotography! With an Narrowband H-alpha filter you will be able to take deep and contrasty images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotos, an H-alpha is the best choice for all nebulas glowing red! An OIII filters expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulas and star forming regions are great targets! The SII filters completes your HSO-set of filters. With these three filters you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQuality aspects of the new Astronomik MFR narrowband-emissionline filters:\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cp\u003eMFR Coating: The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003cbr\u003e\nHigh-Quality substrate: Astronomik filters are made with stress- and striae free, optically polished glass. The filter itself is made of ultra thin layers on this substrate!\u003cbr\u003e\nParfocal filters: All Astronomik Filters are parfocal! Due to the very small thickness-tolerance the focal plane is not shifted when changing filters!\u003cbr\u003e\nCoating: Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as a Anti-Reflection Coating.\u003cbr\u003e\nDurability: Due to our coating technique all Astronomik filters are highly scratch resistant, not sensitive to moisture and do not degrade when getting older. Every Astronomik filter will deliver it´s full perfomance and meet the specs at the point of shipping even after lot´s of years.\u003cbr\u003e\nIntegrated Blocking: All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emissionline filters with coating!)\u003cbr\u003e\nWide range of available sizes from 1,25\" up to square 50mm x 50mm filters.\u003cbr\u003e\nDelivered in a high-quality protection \u0026amp; storage box.\u003cbr\u003e\nDue to our outstanding coating technique we do offer a 10 year guarantee on all of our filters.\u003cbr\u003e\nYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emissionline filters will expand your imaging possibilities enormous! You are investing your money for an accessory which will work in lot´s of years in the same ways it did when it was brand new. Due to our special coating technique the filters do not degrade when getting older, and due to the new MFR coating you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821236166833,"sku":"8H11HY","price":152.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-12nm-ccd-maxfr-125-m285-430397.jpg?v=1718364257"},{"product_id":"astronomik-oiii-12nm-ccd-maxfr-2-m48-high-contrast-nebula-filter","title":"Astronomik OIII 12nm CCD MaxFR 2'' (M48) - High Contrast Nebula Filter","description":"\u003ch1\u003eAstronomik OIII 12nm CCD MaxFR 2'' (M48)\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eThe Astronomik OIII-CCD Filter is ideal for imaging OIII nebulae from light-polluted locations or dark skies. It dramatically enhances contrast between objects glowing at 501nm and their background, giving you clear, high-quality images.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith a narrow bandwidth of 12nm and typical transmission of 96%, this filter effectively blocks unwanted light from UV to IR, providing a dark background and maximizing contrast. This makes it perfect for imaging nebulae and other faint objects, especially in light-polluted areas. Unlike narrower 6nm filters, this 12nm version allows more stars to be visible in the field of view, providing more guiding stars for astrophotography with integrated or dual guiding chips.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned with MFR coating technology, the filter performs optimally with all instruments up to f\/3 without significant performance loss.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Note: The Astronomik OIII filter must NOT be used for solar observation.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eTechnical Data:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGuaranteed transmission: \u0026gt;90% at the OIII line (501nm)\u003c\/li\u003e\n\u003cli\u003eTypical transmission: 95% at the OIII line (501nm)\u003c\/li\u003e\n\u003cli\u003eFull-Width-Half Maximum (FWHM): 12nm\u003c\/li\u003e\n\u003cli\u003eComplete blocking of unwanted light from UV to IR\u003c\/li\u003e\n\u003cli\u003eParfocal with all other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eMFR coating: Usable with all optics up to f\/3\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eScratch-resistant and moisture-resistant\u003c\/li\u003e\n\u003cli\u003eOptically polished substrate: Striae-free and free from residual stresses\u003c\/li\u003e\n\u003cli\u003eDelivered in a high-quality storage box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eImaging with Narrowband Emission Line Filters:\u003c\/h2\u003e\n\u003cp\u003eWhen observing from light-polluted sites, narrowband emission-line filters like the OIII filter are essential for capturing stunning deep-sky images. The OIII filter is perfect for capturing nebulae with a greenish or bluish hue, while the H-alpha filter is ideal for red-emitting nebulae. Combined with an SII filter, you can create false-color images like those produced by the Hubble Space Telescope.\u003c\/p\u003e\n\u003cp\u003eUsing narrowband filters, you can achieve deep, high-contrast images, even in challenging conditions such as heavy light pollution or a full moon. The OIII filter opens up imaging possibilities for planetary nebulae and star-forming regions, providing enhanced contrast and sharper details.\u003c\/p\u003e\n\u003ch2\u003eAdditional Applications:\u003c\/h2\u003e\n\u003cp\u003eBy combining the OIII filter with H-alpha-CCD and SII-CCD filters, you can create Hubble-style false-color images (HSO) even from light-polluted sites. The 12nm bandwidth allows more stars in the field, making it a good choice for regions of the Milky Way with dense star populations.\u003c\/p\u003e\n\u003ch2\u003eAlternatives:\u003c\/h2\u003e\n\u003cp\u003eIf you prefer imaging faint objects in star-crowded regions with shorter focal lengths, consider the 6nm OIII filter. It reduces the number of stars in the field by a factor of two, making it ideal for cameras with low dark current or for observing from heavily light-polluted locations.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821271654577,"sku":"8H11H2","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-12nm-ccd-maxfr-2-m48-880359.jpg?v=1718364244"},{"product_id":"astronomik-oiii-12nm-ccd-maxfr-36mm-filter-high-contrast-imaging-for-nebulae","title":"Astronomik OIII 12nm CCD MaxFR 36mm Filter – High Contrast Imaging for Nebulae","description":"\u003ch1\u003eAstronomik OIII 12nm CCD MaxFR 36mm Filter – High Contrast Imaging for Nebulae\u003c\/h1\u003e\n\n\u003cp\u003e\u003cstrong\u003eExperience exceptional contrast and detailed imaging with the Astronomik OIII 12nm CCD MaxFR 36mm filter, designed specifically for imaging OIII emission nebulae.\u003c\/strong\u003e This filter is ideal for deep-sky astrophotography, enhancing visibility of nebulae in light-polluted areas or at dark sky locations.\u003c\/p\u003e\n\n\u003cp\u003ePerfectly designed for 36mm filter wheels from major brands including ZWO, QHY, SBIG, and Moravian, the filter's blackened edges and protective ring design prevent stray light and ensure mechanical protection.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the Astronomik OIII 12nm Filter?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAstronomik OIII CCD Filter\u003c\/strong\u003e offers an unparalleled contrast boost by blocking all unwanted wavelengths from UV to infrared, allowing only the OIII emission line at 501nm to pass through. With a full width at half maximum (FWHM) of 12nm, this filter is optimized for CMOS and CCD cameras, delivering impressive results, especially in light-polluted conditions.\u003c\/p\u003e\n\n\u003cp\u003eThis filter’s high transmission rate of 95% ensures that even faint objects stand out against a dark background. It also allows more stars to appear in the field of view compared to narrower bandwidth filters, providing more guiding stars for dual-chip guiding setups.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGuaranteed transmission of more than 90% at the OIII line (501nm)\u003c\/li\u003e\n  \u003cli\u003eFull width at half maximum (FWHM): 12nm\u003c\/li\u003e\n  \u003cli\u003eBlocks all unwanted light from UV to infrared\u003c\/li\u003e\n  \u003cli\u003eCompatible with optical systems up to f\/3 thanks to MFR coating\u003c\/li\u003e\n  \u003cli\u003eDurable design: moisture-resistant, scratch-proof, and non-aging\u003c\/li\u003e\n  \u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n  \u003cli\u003eHigh-quality 1mm thick optical glass substrate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImaging with Narrowband Filters\u003c\/h3\u003e\n\u003cp\u003eFor astrophotographers battling light pollution, narrowband emission-line filters like the \u003cstrong\u003eAstronomik OIII 12nm\u003c\/strong\u003e offer a powerful solution. Capture stunning details of planetary nebulae, supernova remnants, and star-forming regions, even under challenging urban or moonlit skies.\u003c\/p\u003e\n\n\u003cp\u003eWhen combined with H-alpha and SII filters, the OIII filter completes your narrowband set, allowing you to create striking false-color Hubble-style images (HSO) from even the most light-polluted environments.\u003c\/p\u003e\n\n\u003ch3\u003eOptimized Performance with DSLR and CCD Cameras\u003c\/h3\u003e\n\u003cp\u003eThis filter is tailored for use with modern DSLR and CCD cameras. It delivers superior results when imaging faint nebulae under heavy light pollution by allowing only the OIII line to pass through, ensuring a dark background and high contrast for your images.\u003c\/p\u003e\n\n\u003ch3\u003eConsider the 6nm Filter for Star-Dense Regions\u003c\/h3\u003e\n\u003cp\u003eIf you frequently photograph dense star fields, the \u003cstrong\u003eAstronomik OIII 6nm filter\u003c\/strong\u003e may be a better choice. Its narrower bandwidth reduces the number of stars in the field by a factor of ~2, providing clearer views of faint nebulae against the starry backdrop.\u003c\/p\u003e\n\n\u003ch3\u003eOrder Now\u003c\/h3\u003e\n\u003cp\u003eDiscover the universe with the \u003cstrong\u003eAstronomik OIII 12nm CCD MaxFR 36mm filter\u003c\/strong\u003e. Experience unparalleled contrast and high-quality imaging. Order yours today for your astrophotography needs!\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821276569777,"sku":"8H11HV","price":223.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-12nm-ccd-maxfr-36mm-879443.jpg?v=1718364223"},{"product_id":"astronomik-oiii-12nm-ccd-maxfr-50mm-filter-for-deep-sky-imaging","title":"Astronomik OIII 12nm CCD MaxFR 50mm Filter for Deep Sky Imaging","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch1\u003eAstronomik OIII 12nm CCD MaxFR 50mm Filter – Deep Sky Imaging\u003c\/h1\u003e\n\n  \u003cp\u003eMaxFR Astronomik photographic narrowband-emission line filters are optimized for fast optical systems, such as Celestron’s RASA and Takahashi Epsilon Astrographs. These filters are designed for high-performance deep-sky imaging and are ideal for capturing the three most important emission lines: oxygen (OIII), hydrogen (H-alpha), and sulfur (SII). Available in both 12nm and 6nm bandwidth options, the MaxFR filters offer unmatched versatility for astrophotography.\u003c\/p\u003e\n\n  \u003ch4\u003eHighest Transmission Performance:\u003c\/h4\u003e\n\n  \u003cp\u003eThe Astronomik MaxFR filters utilize MFR coating technology, providing outstanding out-of-band blocking across a broad range of wavelengths, from UV to IR. This results in extremely high contrast, minimized stray light, no halos, and razor-sharp stars. With these filters, you’ll capture high-quality data, perfect for processing into stunning deep-sky images.\u003c\/p\u003e\n\n  \u003ch4\u003eKey Features:\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFor 12nm filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8 with around 85% transmission at f\/1.4.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFor 6nm filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8 with approximately 90% transmission at f\/2.\u003c\/li\u003e\n    \u003cli\u003eOptimal performance for OIII, H-alpha, and SII emission lines.\u003c\/li\u003e\n    \u003cli\u003eBlocks unwanted light from sources such as H-alpha and nitrogen.\u003c\/li\u003e\n    \u003cli\u003eExcellent for imaging from light-polluted areas, enabling clearer and deeper observations of nebulae and planetary structures.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eImaging Benefits:\u003c\/h4\u003e\n\n  \u003cp\u003eNarrowband-emission line filters are essential when observing from light-polluted sites. An H-alpha filter is often the first step for astrophotography, allowing deep and high-contrast imaging of nebulae, even under challenging conditions like full moonlight. The OIII filter expands imaging possibilities, revealing greenish-blue structures such as planetary nebulae and star-forming regions. The SII filter completes the set, enabling HSO imaging like that from the Hubble Space Telescope.\u003c\/p\u003e\n\n  \u003ch4\u003eAstronomik MFR Narrowband-Emission Line Filters:\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eMade with a high-quality substrate: stress-free, optically polished glass.\u003c\/li\u003e\n    \u003cli\u003eParfocal design: ensures no focal plane shift when switching filters.\u003c\/li\u003e\n    \u003cli\u003eAnti-reflection coating: Up to 170 layers, improving durability and performance.\u003c\/li\u003e\n    \u003cli\u003eScratch-resistant, humidity-proof, and age-resistant.\u003c\/li\u003e\n    \u003cli\u003eAvailable in various sizes, including 1.25” and 50mm x 50mm square filters.\u003c\/li\u003e\n    \u003cli\u003e10-year guarantee: long-lasting performance with no degradation over time.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eEnhance Your Astrophotography:\u003c\/h4\u003e\n\n  \u003cp\u003eWith Astronomik’s MaxFR narrowband filters, you’ll unlock incredible deep-sky imaging possibilities. These filters are designed for precision and durability, ensuring top-quality data for processing and creating breathtaking final images.\u003c\/p\u003e\n\n  \u003ch4\u003eChoosing the Right Filter:\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e12nm Filters:\u003c\/strong\u003e Ideal for DSLR cameras and general-use applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6nm Filters:\u003c\/strong\u003e Best for extreme light pollution conditions and low dark-current cameras, offering maximum contrast and reduced star interference.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eExposure Time Considerations:\u003c\/h4\u003e\n\n  \u003cp\u003eWith high transmission rates, you can expose for longer if desired, capturing even fainter structures. Although not required, longer exposures with narrowband filters offer greater opportunities for detailed imaging by blocking unwanted wavelengths.\u003c\/p\u003e\n\n  \u003ch4\u003eSelection Options:\u003c\/h4\u003e\n\n  \u003cp\u003eChoose the appropriate filter size and bandwidth for your setup, and start enhancing your astrophotography today.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821285548209,"sku":"8H11HW","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-12nm-ccd-maxfr-50mm-223437.jpg?v=1718364256"},{"product_id":"astronomik-oiii-6nm-ccd-maxfr-1-25-premium-deep-sky-filter","title":"Astronomik OIII 6nm CCD MaxFR 1.25'' – Premium Deep-Sky Filter","description":"\u003ch1\u003eAstronomik OIII 6nm CCD MaxFR 1.25'' (M28.5) Filter for Astrophotography\u003c\/h1\u003e\n\n\u003ch2\u003eMaxFR Narrowband Emission Line Filters for Fast Optical Systems\u003c\/h2\u003e\n\u003cp\u003eThere is an ever-growing demand for astrophotography filters suitable for extremely fast optical systems like Celestron's RASA and Takahashi's Epsilon Astrographs. The Astronomik MaxFR series of narrowband-emission line filters is designed to deliver the highest quality data for fast optical systems, enabling deep-sky imaging with maximum contrast and minimal stray light.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose Astronomik MaxFR Filters for Astrophotography?\u003c\/h3\u003e\n\u003cp\u003eThe MaxFR emission line filters are engineered to work with fast focal ratios, making them ideal for deep-sky imaging. You can select filters with 12nm or 6nm bandwidth (FWHM) for the three most important emission lines in astrophotography: oxygen (OIII), hydrogen (H-alpha), and sulfur (SII).\u003c\/p\u003e\n\n\u003ch2\u003eKey Features of Astronomik OIII 6nm CCD MaxFR Filter\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHighest transmission for excellent image quality.\u003c\/li\u003e\n  \u003cli\u003eMinimized stray light and no halos.\u003c\/li\u003e\n  \u003cli\u003eNeedle-sharp stars in your astrophotography images.\u003c\/li\u003e\n  \u003cli\u003eCompatible with fast optical systems, suitable for focal ratios as low as f\/1.4.\u003c\/li\u003e\n  \u003cli\u003eDurable coating, resistant to scratches and moisture.\u003c\/li\u003e\n  \u003cli\u003eAvailable in 1.25\" up to 50mm x 50mm filter sizes.\u003c\/li\u003e\n  \u003cli\u003e10-year guarantee on all Astronomik filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow Astronomik MaxFR Filters Improve Astrophotography\u003c\/h3\u003e\n\u003cp\u003eThe new MaxFR filters are made with advanced MFR coating technology, providing exceptional out-of-band blocking across the entire wavelength range from UV to IR. This ensures an extremely high contrast, reduced stray light, and no halos in your final astrophotography images.\u003c\/p\u003e\n\n\u003ch3\u003eMaxFR Filter Performance at Different Focal Ratios\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12nm Filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, with about 85% of maximum transmission at f\/1.4.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6nm Filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with about 90% of maximum transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eNarrowband Imaging with Astronomik Filters: Boost Contrast and Block Light Pollution\u003c\/h2\u003e\n\u003cp\u003eIf you frequently image from light-polluted areas, narrowband-emission line filters are your best tool for capturing high-contrast deep-sky images. An H-alpha filter is often the first choice for imaging red nebulae, while OIII filters expand your imaging possibilities by revealing blue-green nebulae and planetary structures. Combine H-alpha, OIII, and SII filters to create stunning Hubble Space Telescope-like images.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ: Which Bandwidth Should I Choose - 6nm or 12nm?\u003c\/h3\u003e\n\u003cp\u003eChoosing between 6nm and 12nm depends on your imaging setup and location. For cameras with low dark current and effective cooling, the 6nm filter is ideal for reducing background light and capturing fainter details. The 12nm filter is suitable for DSLR cameras and imaging setups with limited cooling or dark current control.\u003c\/p\u003e\n\n\u003ch3\u003eHow Astronomik Filters Enhance Exposure Time\u003c\/h3\u003e\n\u003cp\u003eWith Astronomik narrowband filters, you don’t have to increase exposure time, but you can if needed. The filters allow nearly all emission line photons to pass through while blocking unwanted light, giving you the flexibility to capture deeper images with longer exposures, especially in light-polluted areas.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Astronomik Filters Are the Best Choice for Astrophotography\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Filters can be used down to f\/1.4 for 12nm and f\/2 for 6nm.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality Substrate:\u003c\/strong\u003e Made from stress-free, optically polished glass for perfect images.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParfocal Filters:\u003c\/strong\u003e Astronomik filters are parfocal, so no refocusing is needed when changing filters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Resistant to scratches and moisture, with no performance degradation over time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Blocks unwanted light from UV to IR, eliminating the need for additional UV\/IR blocking filters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Range of Sizes:\u003c\/strong\u003e Available in sizes from 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10-Year Guarantee:\u003c\/strong\u003e Astronomik offers a 10-year guarantee on all filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821309698225,"sku":"8H11F9","price":241.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-6nm-ccd-maxfr-125-m285-828472.jpg?v=1718364453"},{"product_id":"astronomik-oiii-6nm-ccd-maxfr-2-filter-for-fast-optical-systems","title":"Astronomik OIII 6nm CCD MaxFR 2'' Filter for Fast Optical Systems","description":"\u003ch1\u003eAstronomik OIII 6nm CCD MaxFR 2'' (M48)\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and Takahashi Epsilon Astrographs.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e\nOur new MaxFR filters are designed for fast optical systems, featuring MFR Coating technology that provides the best out-of-band blocking possible across the entire range of wavelengths from the UV to IR. The design ensures extremely high contrast, minimized stray light, no halos, and needle-sharp stars. Astronomik MFR filters give you the best quality data for post-processing into stunning final images.\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8 with about 85% maximum transmission at f\/1.4.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8 with about 90% maximum transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nWhen observing from light-polluted locations, narrowband-emission line filters are your best tool for capturing amazing deep-sky images. Using an H-alpha filter enables deep, high-contrast images even under heavy light pollution or during a full moon. H-alpha filters are ideal for imaging nebulae that glow red, while an OIII filter lets you capture greenish-blue structures like planetary nebulae. The SII filter completes the HSO set, allowing you to process images like the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e 12nm filters work down to f\/1.4, and 6nm filters down to f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality Substrate:\u003c\/strong\u003e Optically polished glass, made with stress- and striae-free materials.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal Filters:\u003c\/strong\u003e All Astronomik filters are parfocal, ensuring no shift in the focal plane when changing filters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Highly scratch-resistant and unaffected by humidity or aging, these filters maintain their performance over many years.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Full blocking of unwanted light across the UV to IR spectrum, so no additional UV\/IR blocker is needed.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" up to 50mm x 50mm square filters.\u003c\/li\u003e\n    \u003cli\u003eComes in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWith Astronomik filters, you get the highest quality possible for astrophotography, especially when dealing with light pollution. These filters will continue to perform as well as new even after years of use. Thanks to the MFR coating, they are compatible with nearly any instrument you may use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFAQs:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is better, 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you have a camera with low dark current and effective cooling, 6nm filters offer better blocking of background light and enable deeper exposures. For DSLR and dark-current-limited cameras, 12nm filters are the better choice.\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eHow does using these filters affect exposure time?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhile you don’t have to expose longer with a narrowband filter, you can do so to capture fainter structures. These filters block unwanted light while allowing nearly all emission line photons to pass through. By reducing the background signal, they enable longer exposures, potentially up to 30 minutes, to reveal more details.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821317857457,"sku":"","price":582.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-6nm-ccd-maxfr-2-m48-418414.jpg?v=1718364249"},{"product_id":"astronomik-oiii-6nm-ccd-maxfr-clip-filter-nikon-z-xl-deep-sky-imaging","title":"Astronomik OIII 6nm CCD MaxFR Clip-Filter Nikon Z XL - Deep-Sky Imaging","description":"\u003ch1\u003eAstronomik OIII 6nm CCD MaxFR Clip-Filter Nikon Z XL\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters give you the best quality of data: The best start material to be processed to an awesome final image!\n\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites (like most of us), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of astrophotography. With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotographs, an H-alpha is the best choice for all nebulae glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/bluish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers that are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after lots of years.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with this coating!)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n  \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are very tiny points, most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nIn summary, 12nm filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe answer is simple: You don't have to expose longer, but you CAN! Due to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. The number of H-alpha-photons, for example, does not change significantly whether an H-alpha filter is installed or not. However, looking at the photons of other wavelengths that we do NOT want to record makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 seconds without any filters from a light-polluted urban observing site, your sky background might be very bright or even saturated. The same image taken with a Narrowband-Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer—probably 30 minutes instead—to record fainter structures!\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821320904881,"sku":"8H11LE","price":627.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-6nm-ccd-maxfr-clip-filter-nikon-z-xl-593019.jpg?v=1718364248"},{"product_id":"astronomik-oiii-6nm-ccd-maxfr-31mm-filter-optimal-for-fast-systems","title":"Astronomik OIII 6nm CCD MaxFR 31mm Filter – Optimal for Fast Systems","description":"\u003ch1\u003eAstronomik OIII 6nm CCD MaxFR 31mm Filter – Fast Optical Systems\u003c\/h1\u003e\n\n\u003ch4\u003eAstronomik Narrowband Filters for Extremely Fast Optical Systems\u003c\/h4\u003e\n\n\u003cp\u003eThere is increasing demand for filters designed for extremely fast optical systems, such as Celestron’s RASA and Takahashi’s Epsilon Astrographs. The Astronomik MaxFR series is specifically crafted to meet the requirements of deep-sky imaging, supporting fast optical systems. You can choose between 12nm and 6nm bandwidths (FWHM) for key emission lines like oxygen (OIII), hydrogen (H-alpha), and sulfur (SII).\u003c\/p\u003e\n\n\u003ch4\u003eMaxFR OIII-CCD Filter\u003c\/h4\u003e\n\n\u003cp\u003eThe MaxFR OIII-CCD filter is available in both 6nm and 12nm bandwidths, offering optimal transmission for narrowband imaging. This filter ensures maximum contrast and detail capture, even in heavily light-polluted environments.\u003c\/p\u003e\n\n\u003ch4\u003eMaxFR H-alpha-CCD Filter\u003c\/h4\u003e\n\n\u003cp\u003eThe MaxFR H-alpha-CCD filter is perfect for capturing the rich red emission lines from nebulae. With bandwidth options of 6nm and 12nm, you can select the filter that suits your imaging setup best.\u003c\/p\u003e\n\n\u003ch4\u003eMaxFR SIII-CCD Filter\u003c\/h4\u003e\n\n\u003cp\u003eThe MaxFR SIII-CCD filter rounds out the set of essential filters for astrophotographers. Available in 6nm and 12nm bandwidths, this filter enhances the capture of sulfur emission lines, providing the depth and contrast needed for Hubble-like images.\u003c\/p\u003e\n\n\u003ch4\u003eHighest Transmission for Fast Systems\u003c\/h4\u003e\n\n\u003cp\u003eThe MaxFR filters are built using advanced MFR Coating technology to block out-of-band wavelengths while providing excellent contrast, reduced stray light, and no halos. These filters are specifically designed for use with fast optical systems, ensuring needle-sharp stars and optimal data quality.\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003e12nm Filters:\u003c\/strong\u003e Usable with systems from f\/1.7 to f\/8, providing about 85% transmission at f\/1.4.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003e6nm Filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with approximately 90% transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eEnhanced Imaging for Light-Polluted Environments\u003c\/h4\u003e\n\n\u003cp\u003eWhen imaging from light-polluted areas, narrowband filters like the MaxFR series can dramatically improve image quality. H-alpha filters are ideal for capturing nebulae that glow red, while OIII and SII filters enhance imaging possibilities by revealing structures in greenish and blueish tones. Using these filters together allows you to create Hubble Space Telescope-like images, even in challenging conditions.\u003c\/p\u003e\n\n\u003ch4\u003eQuality Features of Astronomik MaxFR Filters\u003c\/h4\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Offers perfect performance with all instruments down to f\/1.4 (12nm filters) and f\/2 (6nm filters).\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Substrate:\u003c\/strong\u003e Made with striae-free, optically polished glass, ensuring no image distortion.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eParfocal:\u003c\/strong\u003e All Astronomik filters are parfocal, meaning you won’t need to adjust your focus when switching filters.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and age-resistant coating ensures long-lasting performance.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eBlocking:\u003c\/strong\u003e Blocks unwanted light from UV to IR wavelengths, eliminating the need for additional UV\/IR blocking filters.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to square 50mm x 50mm filters.\u003c\/li\u003e\n\t\u003cli\u003eComes with a high-quality protective storage box.\u003c\/li\u003e\n\t\u003cli\u003e10-year guarantee for full performance and durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eChoosing the Right Filter for Your Setup\u003c\/h4\u003e\n\n\u003cp\u003eIf you’re using a DSLR or camera with limited dark current, the 12nm filters are an excellent choice. For extreme light pollution or if your camera has very low dark current, the 6nm filters offer the best contrast and star reduction, perfect for faint structures in star-crowded regions of the Milky Way.\u003c\/p\u003e\n\n\u003ch4\u003eExposure Time and Imaging\u003c\/h4\u003e\n\n\u003cp\u003eWhile you don’t need to increase exposure time, the MaxFR filters allow you to extend exposures to capture fainter details. Thanks to high transmission rates, the filters block unwanted wavelengths, ensuring your images are not overexposed. This means you can expose for longer (up to 30 minutes) and capture more detail.\u003c\/p\u003e\n\n\u003ch4\u003eSelection Guide\u003c\/h4\u003e\n\n\u003cp\u003eSelect the appropriate size and bandwidth (FWHM) to find the MaxFR filter best suited for your setup. Enhance your deep-sky imaging results with Astronomik filters today.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821331816625,"sku":"8H11F5","price":304.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-6nm-ccd-maxfr-31mm-388436.jpg?v=1718364255"},{"product_id":"astronomik-oiii-6nm-ccd-maxfr-36mm-filter-for-deep-sky-imaging","title":"Astronomik OIII 6nm CCD MaxFR 36mm Filter for Deep-Sky Imaging","description":"\u003ch1\u003eAstronomik OIII 6nm CCD MaxFR 36mm\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems\u003c\/h4\u003e\n\u003cp\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/p\u003e\n\u003cp\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you can select filters with either 12nm or 6nm Bandwidth (FWHM).\u003c\/p\u003e\n\u003ch4\u003eMaxFR OIII-CCD filter\u003c\/h4\u003e\n\u003cp\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003ch4\u003eMaxFR H-alpha-CCD filter\u003c\/h4\u003e\n\u003cp\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003ch4\u003eMaxFR SIII-CCD filter\u003c\/h4\u003e\n\u003cp\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003ch4\u003eHighest Transmission\u003c\/h4\u003e\n\u003cp\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! This new design offers extremely high contrast, minimized stray light, no halos, and needle-sharp stars. Astronomik MFR narrowband-emission line filters provide the best data quality, giving you excellent start material for processing into stunning final images!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor 12nm MaxFR filters, unlimited usability from f\/1.7 to f\/8, and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/li\u003e\n\u003cli\u003eFor 6nm MaxFR filters, unlimited usability from f\/2.2 to f\/8, with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003ch4\u003eImaging with Narrowband-Emission Line Filters\u003c\/h4\u003e\n\u003cp\u003eIf you observe from light-polluted sites, imaging with narrowband-emission line filters is the best way to capture great images, as all kinds of light pollution can be effectively blocked. Normally, an H-alpha filter should be your first step into astrophotography. With a Narrowband H-alpha filter, you will take deep and contrasting images even under heavy light pollution or when the full moon is in the sky! OIII filters expand your imaging possibilities, allowing you to image all greenish\/blueish structures like planetary nebulae and star-forming regions. The SII filter completes your HSO filter set, enabling you to process your images in ways similar to the Hubble Space Telescope!\u003c\/p\u003e\n\u003ch4\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Substrate:\u003c\/strong\u003e Astronomik filters are made with stress-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal Filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers, coated on both sides of the substrate. These layers act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Astronomik filters are highly scratch-resistant, moisture-resistant, and will not degrade over time. Every Astronomik filter delivers full performance and meets specifications even after years of use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked across the entire spectral range from UV to IR! You will not need an additional UV\/IR-Blocker when imaging with any of our new narrowband-emission line filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e – from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThanks to our coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou will get the highest quality possible with every single Astronomik filter, enabling perfect images with your instruments! Especially with filters against light pollution and narrowband-emission line filters, your imaging possibilities will expand enormously. You are investing in an accessory that will continue working for years as it did when new. Due to our special coating technique, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all instruments!\u003c\/p\u003e\n\u003ch4\u003eCommon Questions from Customers\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThere is no \"right\" or \"wrong\" choice here. If you have a camera with low dark current and effective cooling, the 6nm filters offer advantages: the stronger background blocking allows for longer exposures and deeper images. Stars will appear as tiny points, and many faint stars will not be visible, allowing you to capture faint structures even in star-crowded regions. The 12nm filters are ideal for all DSLRs and dark-current-limited cameras, while the 6nm filters are best for extreme light pollution, low-dark-current cameras, and when weak objects require maximum contrast and star-reduction.\u003c\/p\u003e\n\u003ch4\u003eHow much is exposure time increased?\u003c\/h4\u003e\n\u003cp\u003eWhile exposure times don't need to be longer, they can be! With high transmission at the center wavelength, nearly all emission line photons reach the sensor, so the number of \"H-alpha-photons\" doesn't change much whether or not a filter is used. However, blocking unwanted light from UV to IR reduces the background signal, allowing you to expose longer – perhaps 30 minutes instead of 30 seconds – to record fainter structures.\u003c\/p\u003e\n\u003ch4\u003eFilter Selection\u003c\/h4\u003e\n\u003cp\u003eSelect the appropriate size and FWHM to find the right filters for your setup.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821332832433,"sku":"8H11F6","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-oiii-6nm-ccd-maxfr-36mm-180407.jpg?v=1718364222"},{"product_id":"astronomik-oiii-6nm-ccd-maxfr-50mm-high-contrast-imaging","title":"Astronomik OIII 6nm CCD MaxFR 50mm – High Contrast Imaging","description":"\u003ch1\u003eAstronomik OIII 6nm CCD MaxFR 50mm\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems\u003c\/h4\u003e\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is an \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light,\u003cstrong\u003e no halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003eIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003eIf you look at other astrophotographs, an H-alpha is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filters complete your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers, which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade with time. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after many years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with MFR coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will enormously expand your imaging possibilities! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up often. A general \"right\" or \"wrong\" or \"best\" answer does not make sense. We would not offer both series if they were not needed.\u003cbr\u003eIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are tiny points, and most faint stars do not show up anymore! - This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003eIn short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis question is asked quite often, and the answer is very simple: You don’t have to expose longer, but you MAY expose longer!\u003cbr\u003eDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So, the number of, for example, \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record, makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do a 30 sec exposure without any filters from a light-polluted urban observing site, your sky background might be already very, very bright or even saturated. The same image taken with a Narrowband Emission line filter will give you a perfect black background without any unwanted signals, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer - probably 30 min instead - to record fainter structures! 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The Astronomik MaxFR series of narrowband-emission line filters meets the needs of deep-sky imaging with fast systems. For oxygen (OIII), hydrogen (H-alpha), and sulfur (SII) emission lines, you can choose filters with 12nm or 6nm bandwidths (FWHM).\u003c\/p\u003e\n\n\u003ch4\u003eHighest Transmission and Performance\u003c\/h4\u003e\n\u003cp\u003eThe Astronomik MaxFR filters are designed for optimal performance with fast optical systems. With the renowned MFR Coating technique, these filters offer the best out-of-band blocking, covering the full range of wavelengths from UV to IR. These filters deliver extremely high contrast, minimized stray light, no halos, and needle-sharp stars.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, achieving about 85% maximum transmission at f\/1.4.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, achieving about 90% maximum transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter effectively blocks H-alpha and NII (nitrogen) light.\u003c\/p\u003e\n\n\u003ch4\u003eImaging with Narrowband Emission Line Filters\u003c\/h4\u003e\n\u003cp\u003eImaging with narrowband-emission line filters is ideal when observing from light-polluted sites. Narrowband H-alpha filters enable deep, contrast-rich imaging even under heavy light pollution or with the full moon in the sky. The H-alpha filter is best for red-glowing nebulae, while the OIII filter captures greenish\/blueish structures like planetary nebulae and star-forming regions. The SII filter completes your HSO set for processing images like those from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003ch4\u003eQuality Aspects of Astronomik MaxFR Narrowband Emission Line Filters\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Usable down to f\/1.4 with 12nm filters and down to f\/2 with 6nm filters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-quality substrate:\u003c\/strong\u003e Made with stress- and striae-free, optically polished glass.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal with very small thickness tolerance, ensuring no shift in focal plane when changing filters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Highly scratch-resistant, moisture-insensitive, and resistant to aging. Filters maintain full performance and meet specifications even after years of use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Unwanted light is blocked across the entire spectral range from UV to IR.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide range of sizes:\u003c\/strong\u003e Available in sizes from 1.25\" to square 50mm x 50mm filters.\u003c\/li\u003e\n  \u003cli\u003eDelivered in a high-quality protection and storage box.\u003c\/li\u003e\n  \u003cli\u003eBacked by a 10-year guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAstronomik filters provide the highest possible quality for perfect images. The filters are a long-term investment, designed to work the same even after years of use. The new MFR coating ensures compatibility with nearly all instruments, extending the possibilities of astrophotography and deep-sky imaging.\u003c\/p\u003e\n\n\u003ch4\u003eCommon Questions About Narrowband Emission Line Filters\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eWhich full-width half-maximum (FWHM) is best, 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThere's no definitive \"best\" choice between 12nm and 6nm filters. If you use a camera with extremely low dark current and effective cooling, the 6nm filters provide better contrast and star reduction. For DSLRs and dark-current-limited cameras, 12nm filters are ideal. If you're observing from heavily light-polluted sites or need maximum contrast, the 6nm filter offers significant benefits.\u003c\/p\u003e\n\n\u003ch4\u003eHow Much Does Exposure Time Increase?\u003c\/h4\u003e\n\u003cp\u003eExposure times don't necessarily increase, but you can expose for longer if needed. Narrowband filters block unwanted light, allowing you to capture deep-sky details even from light-polluted areas. While a 30-second exposure without a filter might saturate the sky background, the same exposure with a narrowband filter will yield a clean, black background, enabling longer exposures to capture faint structures.\u003c\/p\u003e\n\n\u003ch4\u003eFilter Selection\u003c\/h4\u003e\n\u003cp\u003eSelect the appropriate filter size and FWHM to get a list of available options that suit your setup.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821337845937,"sku":"8H11HO","price":152.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-125-m285-510335.jpg?v=1718364459"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-2-m48-superior-contrast-filter","title":"Astronomik H-alpha 12nm CCD MaxFR 2\" (M48) - Superior Contrast Filter","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR 2'' (M48)\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage with our new design is extremely high contrast, minimized stray light, no halos, and needle-sharp stars. The Astronomik MFR narrowband-emission line filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003eIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003eIf you look at other Astrophotosgraphs, an H-alpha is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, allowing you to image all greenish\/blueish structures. Planetary nebula and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers, which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade with age. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after many years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade over time, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up in emails on our monitor or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003eIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are very tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003eTo put it simply: 12nm Filters are the right choice for all DSLR’s and dark-current limited cameras.\u003cbr\u003e6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don't have to expose longer, but you MAY expose longer!\u003cbr\u003eDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of \"H-alpha photons,\" for example, does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record, makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do an exposure of 30 sec without any filters from a light-polluted urban observing site, your sky background might be already very, very bright or even saturated. The same image taken with a Narrowband Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer -probably 30 minutes instead- to record fainter structures! So it's not a \"must,\" it's a \"can\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003cbr\u003ePlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821358686385,"sku":"8H11HP","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-2-m48-187604.jpg?v=1718364248"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-eos-aps-c-narrowband-filter","title":"Astronomik H-alpha 12nm CCD MaxFR Clip-Filter EOS APS-C | Narrowband Filter","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR Clip-Filter EOS APS-C\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and Takahashi Epsilon Astrographs.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters with either 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e\nOur new MaxFR filters are designed for fast optical systems, featuring MFR Coating technology that provides the best out-of-band blocking possible across the entire range of wavelengths from the UV to IR. The design ensures extremely high contrast, minimized stray light, no halos, and needle-sharp stars. Astronomik MFR filters give you the best quality data for post-processing into stunning final images.\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8 with about 85% maximum transmission at f\/1.4.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8 with about 90% maximum transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters:\u003c\/strong\u003e\u003cbr\u003e\nWhen observing from light-polluted locations, narrowband-emission line filters are your best tool for capturing amazing deep-sky images. Using an H-alpha filter enables deep, high-contrast images even under heavy light pollution or during a full moon. H-alpha filters are ideal for imaging nebulae that glow red, while an OIII filter lets you capture greenish-blue structures like planetary nebulae. The SII filter completes the HSO set, allowing you to process images like the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e 12nm filters work down to f\/1.4, and 6nm filters down to f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality Substrate:\u003c\/strong\u003e Optically polished glass, made with stress- and striae-free materials.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal Filters:\u003c\/strong\u003e All Astronomik filters are parfocal, ensuring no shift in the focal plane when changing filters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Highly scratch-resistant and unaffected by humidity or aging, these filters maintain their performance over many years.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Full blocking of unwanted light across the UV to IR spectrum, so no additional UV\/IR blocker is needed.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" up to 50mm x 50mm square filters.\u003c\/li\u003e\n    \u003cli\u003eComes in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWith Astronomik filters, you get the highest quality possible for astrophotography, especially when dealing with light pollution. These filters will continue to perform as well as new even after years of use. Thanks to the MFR coating, they are compatible with nearly any instrument you may use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFAQs:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is better, 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you have a camera with low dark current and effective cooling, 6nm filters offer better blocking of background light and enable deeper exposures. For DSLR and dark-current-limited cameras, 12nm filters are the better choice.\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eHow does using these filters affect exposure time?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhile you don’t have to expose longer with a narrowband filter, you can do so to capture fainter structures. These filters block unwanted light while allowing nearly all emission line photons to pass through. By reducing the background signal, they enable longer exposures, potentially up to 30 minutes, to reveal more details.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821364519089,"sku":"8H11HN","price":241.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-eos-aps-c-965841.jpg?v=1718364260"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-for-fast-systems","title":"Astronomik H-alpha 12nm CCD MaxFR Clip-Filter for Fast Systems","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR Clip-Filter EOS XL\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The Astronomik MaxFR series of narrowband emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select filters with either 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e\nOur new MaxFR filters are designed to work perfectly with fast optical systems. The built-in MFR Coating technique provides the best out-of-band blocking possible across the entire range of wavelengths from UV up to IR! Enjoy extremely high contrast, minimized stray light, no halos, and needle-sharp stars. Astronomik MFR narrowband-emission line filters offer the best quality data to process into awesome final images!\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFor 12nm MaxFR filters: Unlimited usability from f\/1.7 to f\/8, and about 85% of maximum transmission at f\/1.4.\u003c\/li\u003e\n  \u003cli\u003eFor 6nm MaxFR filters: Unlimited usability from f\/2.2 to f\/8, with about 90% of maximum transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you observe from light-polluted areas, imaging with narrowband-emission line filters is an excellent way to take great images as most types of light pollution can be blocked effectively! Typically, an H-alpha filter should be your first step into astrophotography. With an H-alpha filter, you can capture deep and contrasting images even under heavy light pollution or a bright full moon! OIII filters allow imaging of greenish-blue structures, ideal for planetary nebulae and star-forming regions. The SII filter completes your HSO-set, allowing you to process images like those from the Hubble Space Telescope.\u003c\/p\u003e\n\n\u003ch4\u003eQuality Aspects of Astronomik MFR Narrowband-Emission Line Filters:\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMFR Coating: 12nm filters work for instruments down to f\/1.4, 6nm filters work down to f\/2.\u003c\/li\u003e\n  \u003cli\u003eHigh-Quality Substrate: Astronomik filters are made with stress- and striae-free, optically polished glass with ultra-thin layers.\u003c\/li\u003e\n  \u003cli\u003eParfocal Filters: All Astronomik filters are parfocal, ensuring no shift in the focal plane when changing filters.\u003c\/li\u003e\n  \u003cli\u003eDurability: Scratch-resistant, moisture-resistant, and guaranteed to meet specs even after years of use.\u003c\/li\u003e\n  \u003cli\u003eIntegrated Blocking: Blocks unwanted light in the entire spectral range from UV to IR, no additional UV\/IR-blocker needed.\u003c\/li\u003e\n  \u003cli\u003eAvailable Sizes: 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n  \u003cli\u003eDelivered in a high-quality protection \u0026amp; storage box, and covered by a 10-year guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFAQ - Narrowband-Emission Line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich is the best FWHM, 12nm or 6nm?\u003c\/strong\u003e\u003cbr\u003e\nThere is no universal right or wrong answer. If you have a camera with extremely low dark current and effective cooling, 6nm filters offer better contrast and star reduction. 12nm filters are the best choice for DSLR cameras and dark-current-limited cameras, while 6nm filters are better for sites with extreme light pollution and weak objects requiring maximum contrast.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow much does exposure time increase?\u003c\/strong\u003e\u003cbr\u003e\nYou don’t have to expose for longer, but you can! The high transmission ensures nearly all emission line photons reach the sensor. However, blocking unwanted light allows you to expose longer if needed to capture faint structures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFilter Selection:\u003c\/strong\u003e\u003cbr\u003e\nChoose the matching size and FWHM for your setup to get the right filter for your needs.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821366943921,"sku":"8H11HR","price":376.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-eos-xl-331919.jpg?v=1718364242"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-for-eos-r-xl","title":"Astronomik H-alpha 12nm CCD MaxFR Clip-Filter for EOS R XL","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR Clip-Filter EOS R XL\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e6nm and 12nm FWHM\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is extremely high contrast, minimized stray light, no halos, and needle-sharp stars. The Astronomik MFR narrowband-emission line filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003eIf you have to observe from light-polluted sites, imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of astrophotography. With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003c\/p\u003e\n\u003cp\u003eIf you look at other astrophotos, an H-alpha filter is the best choice for all nebulae glowing red! An OIII filter expands your imaging possibilities, as you can image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are parfocal! Due to the very small thickness tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping, even after many years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with this coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e From 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission Line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe question \"Which full-width-half-maximum (FWHM) is the best?\" shows up very often. A general \"right\" or \"wrong\" answer does not make sense. We offer both series because they are both needed. If you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are tiny points, and most faint stars do not show up anymore! This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way. To put it short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras. 6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark current, and when weak objects require the maximum contrast and star reduction possible!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis question is asked quite often, and the answer is simple: You don’t have to expose longer, but you MAY expose longer! Due to the high transmission of approximately 100% at the centre wavelength, nearly all emission line photons reach the sensor. So, the number of \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. However, looking at the photons of other wavelengths, which we do NOT want to record, makes the effect of the filter clear: The combination of a very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 seconds without any filters from a light-polluted urban observing site, your sky background might be very bright or even saturated. The same image taken with a narrowband-emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer - probably 30 minutes instead - to record fainter structures! So it’s not a \"must,\" it’s a \"can\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003cbr\u003ePlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821371629745,"sku":"8H11HQ","price":403.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-eos-r-xl-568584.jpg?v=1718364223"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-for-sony-alpha-7-cameras","title":"Astronomik H-alpha 12nm CCD MaxFR Clip-Filter for Sony alpha 7 Cameras","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR Clip-Filter Sony alpha 7\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Takahashi Epsilon Astrographs.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select filters either with 12nm or 6nm bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003eOur new MaxFR filters are designed to work perfectly with fast optical systems. The MFR Coating technique provides the best out-of-band blocking possible across the range of wavelengths from UV to IR. The new design offers \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. Astronomik MFR narrowband-emission line filters provide the best data quality for producing amazing final images.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, with about 85% maximum transmission at f\/1.4 guaranteed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with about 90% maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nNarrowband-emission line filters are perfect for observing from light-polluted areas. H-alpha filters should be your first step into narrowband astrophotography, allowing deep, contrasting images even in severe light pollution or under a full moon. H-alpha filters are ideal for capturing red-glowing nebulae. OIII filters enable imaging of greenish-blue structures, such as planetary nebulae and star-forming regions. SII filters complete your HSO set, letting you process your images like those taken by the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters work on systems as fast as f\/1.4, and the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made from stress- and striae-free, optically polished glass. The filters consist of ultra-thin layers on the substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal, with thickness tolerances that prevent the focal plane from shifting when changing filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Coated on both sides with up to 170 layers for anti-reflection properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and designed to last for years without degradation. Every Astronomik filter will deliver full performance and meet specifications even after years of use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete blocking from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e thanks to our outstanding coating technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou’ll get the highest quality with every Astronomik filter, enhancing your imaging possibilities. These filters provide long-lasting performance, working as well as when they were brand new. With our special coating, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all optical systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best FWHM for me – 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIt depends on your setup. For DSLR cameras and dark-current-limited cameras, 12nm filters are ideal. For extreme light pollution and cameras with low dark current, 6nm filters provide better contrast and star reduction, making them suitable for deep imaging.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow does exposure time change with narrowband filters?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eUsing narrowband filters doesn’t necessarily require longer exposure times, but you can extend exposure to record fainter details without unwanted light interference. 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The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters give you the best quality of data: The best starting material to be processed into an awesome final image!\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters:\u003c\/strong\u003e Usability from f\/1.7 to f\/8, with about 85% of maximum transmission at f\/1.4 guaranteed.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFor 6nm MaxFR filters:\u003c\/strong\u003e Usability from f\/2.2 to f\/8 with about 90% of maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nImaging with narrowband-emission line filters is the best way to take great images from light-polluted sites, as they effectively block all kinds of light pollution. Normally, an H-alpha filter should be your first step into narrowband astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images, even with very heavy light pollution or with the full moon in the sky! H-alpha is perfect for capturing nebulae glowing red! An OIII filter expands your imaging capabilities by allowing you to capture greenish\/blueish structures like planetary nebulae and star-forming regions. The SII filter completes your HSO filter set, letting you process your images like those from the Hubble Space Telescope.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters work on systems as fast as f\/1.4, and the 6nm filters as fast as f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made from stress- and striae-free, optically polished glass. The filters consist of ultra-thin layers on the substrate.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal, with thickness tolerances that prevent the focal plane from shifting when changing filters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Coated on both sides with up to 170 layers for anti-reflection properties.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and designed to last for years without degradation. Every Astronomik filter will deliver full performance and meet specifications even after years of use.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete blocking from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e thanks to our outstanding coating technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou’ll get the highest quality with every Astronomik filter, enhancing your imaging possibilities. These filters provide long-lasting performance, working as well as when they were brand new. With our special coating, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all optical systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me—12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIt depends on your setup. For DSLR cameras and dark-current-limited cameras, 12nm filters are ideal. For extreme light pollution and cameras with low dark current, 6nm filters provide better contrast and star reduction, making them suitable for deep imaging.\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eHow does exposure time change with narrowband filters?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eUsing narrowband filters doesn’t necessarily require longer exposure times, but you can extend exposure to record fainter details without unwanted light interference. This results in clearer images, even from light-polluted areas.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR Filters for Fast Optical Systems\u003c\/strong\u003e\u003cbr\u003eChoose the size and FWHM that fit your setup, and start capturing stunning deep-sky images today.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821377790129,"sku":"8H11HS","price":403.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-nikon-xl-625269.jpg?v=1718364223"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-for-nikon-z-xl","title":"Astronomik H-alpha 12nm CCD MaxFR Clip-Filter for Nikon Z XL","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR Clip-Filter Nikon Z XL\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best starting material to be processed into an awesome final image!\u003cbr\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites (like most of us), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other Astrophotographs, an H-alpha filter is the best choice for all nebulae glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/bluish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, and the 6nm filters down to f\/2.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers that are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping, even after many years.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked across the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with this coating!)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e From 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n  \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will greatly expand your imaging possibilities! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade with age, and with the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is \"best\" often comes up in emails or when talking to customers at fairs. A general \"right,\" \"wrong,\" or \"best\" answer doesn't make sense. We wouldn't offer both series if they weren't needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are very tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nIn summary, 12nm filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked often, and the answer is simple: You don't have to expose longer, but you CAN!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of H-alpha-photons, for example, doesn't change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths that we do NOT want to record, the effect of the filter becomes clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 seconds without any filters from a light-polluted urban observing site, your sky background might be very bright or even saturated. The same image taken with a Narrowband-Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer—probably 30 minutes instead—to record fainter structures!\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821380149425,"sku":"8H11LG","price":403.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-clip-filter-nikon-z-xl-844844.jpg?v=1718364260"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-31mm-for-fast-optical-systems","title":"Astronomik H-alpha 12nm CCD MaxFR 31mm – For Fast Optical Systems","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR 31mm\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003cp\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/p\u003e\n\n\u003cp\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/p\u003e\n\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e MaxFR filters are designed with the well-known MFR Coating technique that provides the best out-of-band blocking possible across the entire range of wavelengths from UV up to IR. This offers extremely high contrast, minimized stray light, no halos, and needle-sharp stars. These filters deliver the best data quality for processing stunning final images.\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Suitable for use from f\/1.7 to f\/8, with about 85% of maximum transmission at f\/1.4.\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with approximately 90% of maximum transmission at f\/2.\u003c\/li\u003e\n\n\u003cli\u003eMaximum contrast achieved with careful design, blocking all unwanted wavelengths, including H-alpha and NII for SII filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eImaging with Narrowband-Emission Line Filters:\u003c\/h4\u003e\n\u003cp\u003eIf you must observe from light-polluted areas (as most of us do), imaging with narrowband-emission line filters is the best way to capture high-quality images, as all types of light pollution can be effectively blocked! Typically, an H-alpha filter is the first step into deep-sky astrophotography, allowing you to capture detailed and high-contrast images, even with heavy light pollution or under a full moon.\u003c\/p\u003e\n\n\u003cp\u003eAn OIII filter expands your imaging possibilities by enabling you to capture greenish\/blueish structures, such as planetary nebulae and star-forming regions. The SII filter completes your HSO-set, allowing you to process your images similarly to Hubble Space Telescope pictures!\u003c\/p\u003e\n\n\u003ch4\u003eQuality Aspects of Astronomik MFR Narrowband-Emission Line Filters:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, and the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass, with ultra-thin layers applied to this substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e Astronomik filters are Parfocal! The small thickness tolerance ensures the focal plane remains unchanged when switching filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Astronomik filters are highly scratch-resistant, moisture-resistant, and do not degrade over time. Every filter performs at full capacity upon shipment and will continue to do so for many years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Unwanted light is blocked across the full spectral range from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers when imaging with Astronomik filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable sizes:\u003c\/strong\u003e Filters are available from 1.25\" up to square 50mm x 50mm sizes.\u003c\/li\u003e\n\u003cli\u003eFilters are delivered in a high-quality protection and storage box with a 10-year guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWith every Astronomik filter, you get the highest quality possible, ensuring perfect images with your instruments. Particularly useful for combating light pollution, the narrowband-emission line filters will greatly expand your imaging capabilities. By investing in these filters, you are purchasing accessories that will perform just as well after many years as they did when new, thanks to Astronomik's special coating technique.\u003c\/p\u003e\n\n\u003ch4\u003eCommon Questions:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich is better: 12nm or 6nm?\u003c\/strong\u003e For cameras with extremely low dark current and effective cooling, 6nm filters provide better results, with longer exposures yielding deeper images. However, 12nm filters are the best option for DSLR cameras and dark-current-limited systems. 6nm filters are ideal for heavy light pollution and when maximum contrast and star reduction are necessary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow much does exposure time increase?\u003c\/strong\u003e Exposure times do not necessarily need to increase, but they can be extended for better results. Since narrowband filters block unwanted light so effectively, the background remains dark, allowing for longer exposures to capture fainter details.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSelect your filter size and FWHM to see all available options.\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821382967473,"sku":"8H11HK","price":206.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-31mm-278427.jpg?v=1718364244"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-36mm-filter-high-contrast-imaging","title":"Astronomik H-alpha 12nm CCD MaxFR 36mm Filter – High Contrast Imaging","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR 36mm\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA or the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003cbr\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission line Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other Astrophotographs, an H-alpha filter is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after lots of years.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with MFR coating!)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e From 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up in emails or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background you will be able to expose longer and get deeper images! All stars are very tiny poin\n\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821384540337,"sku":"8H11HL","price":223.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-36mm-439678.jpg?v=1718364254"},{"product_id":"astronomik-h-alpha-12nm-ccd-maxfr-50mm-high-contrast-filter","title":"Astronomik H-alpha 12nm CCD MaxFR 50mm – High Contrast Filter","description":"\u003ch1\u003eAstronomik H-alpha 12nm CCD MaxFR 50mm\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA or the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is extremely high contrast, minimized stray light, no halos, and needle-sharp stars. The Astronomik MFR narrowband-emission line filters give you the best quality of data: the best start material to be processed into an awesome final image!\u003cbr\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at a f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003c\/h4\u003e\n\n\u003cp\u003eIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be effectively blocked! Normally an H-alpha filter should be your first step into this amazing field of astrophotography. With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003eIf you look at other astrophotographs, an H-alpha filter is the best choice for nebulae glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebula and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you can process your images just like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping, even after many years.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e From 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n  \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will enormously expand your imaging possibilities! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade over time, and thanks to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eCommon questions asked by customers about Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question about the best full-width-half-maximum (FWHM) comes up frequently. A general \"right\" or \"wrong\" or \"best\" answer does not make sense. We offer both series because they are needed for different setups.\u003cbr\u003eIf you have a camera with extremely low dark current and effective cooling, the 6nm filters will provide major advantages: the stronger blocking of the background allows for longer exposures and deeper images! All stars become tiny points, and most faint stars do not show up anymore! This is a major advantage, even for normal cameras, as you can capture faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003eTo put it simply: 12nm Filters are the right choice for all DSLRs and dark-current-limited cameras.\u003cbr\u003e6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is common, and the answer is easy: You do not have to expose longer, but you **can**!\u003cbr\u003eDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So, the number of H-alpha photons, for example, does not change significantly whether an H-alpha filter is installed or not. But looking at photons of other wavelengths, which we do not want to record, makes the effect of the filter clear: The combination of very good blocking of unwanted light from UV to IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do a 30-second exposure without any filters from a light-polluted urban observing site, your sky background might already be very bright or even saturated. The same image taken with a Narrowband Emission Line filter will give you a perfect black background without any signal, and the object signal will be about the same. With this black background, you can expose longer—probably 30 minutes instead—to record fainter structures! So it is not a \"must,\" it is a \"can.\"\u003c\/p\u003e\n\n\u003ch4\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003ePlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821384769713,"sku":"8H11HM","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-12nm-ccd-maxfr-50mm-997583.jpg?v=1718364237"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-1-25-m28-5-filter-for-fast-systems","title":"Astronomik H-alpha 6nm CCD MaxFR 1.25\" (M28.5) Filter for Fast Systems","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR 1,25'' (M28,5)\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters give you the best quality of data: the best start material to be processed to an awesome final image!\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at a f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites, imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003c\/p\u003e\n\n\u003cp\u003eIf you look at other astrophotographs, an H-alpha filter is the best choice for all nebulae glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/bluish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after years.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with MFR coating!)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e From 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory which will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question which full-width-half-maximum (FWHM) is the \"best\" comes up very often. A general \"right\" or \"wrong\" or \"best\" answer does not make sense. We would not offer both series if they were not needed.\u003c\/p\u003e\n\n\u003cp\u003eIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are very tiny points, and most faint stars do not show up anymore. This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003c\/p\u003e\n\n\u003cp\u003eTo put it simply: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras. 6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou don't have to expose longer, but you MAY expose longer! Due to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. The combination of very good blocking of unwanted light and the narrow bandwidth of the filters reduces all unwanted signal on the sensor, allowing for longer exposures without increasing unwanted background signals.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821388931249,"sku":"8H11EE","price":241.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-125-m285-402500.jpg?v=1718364237"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-2-m48-filter-for-fast-optics","title":"Astronomik H-alpha 6nm CCD MaxFR 2\" (M48) Filter for Fast Optics","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR 2'' (M48)\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003e There is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e \u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e \u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e MaxFR SIII-CCD filter\u003cbr\u003e 6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e Our new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in, well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from UV up to IR! Your advantage of our new design is extremely high contrast, minimized stray light, no halos, and needle-sharp stars. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 is guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 is guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e If you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky! If you look at other Astrophotosgraphs, an H-alpha is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/bluish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO set of filters. With these three filters, you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after lots of years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a\u003cstrong\u003e high-quality protection \u0026amp; storage box.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDue to our outstanding coating technique, we offer a\u003cstrong\u003e 10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work for lots of years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up in emails on our monitor or when talking to customers at fairs very often. A general \"right,\" \"wrong,\" or \"best\" does not make any sense. We would not offer both series if they were not needed. If you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are very tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way! To put it shortly: 12nm Filters are the right choice for all DSLR`s and dark-current-limited cameras. 6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don’t have to expose longer, but you MAY expose longer! Due to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of, for example, \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 sec without any filters from a light-polluted urban observing site, your sky background might be already very, very bright or even saturated. The same image taken with a Narrowband -Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer -probably 30 min instead- to record fainter structures! So it’s not a \"must,\" it’s a \"can\".\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e Please select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821391225009,"sku":"8H11F0","price":582.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-2-m48-686151.jpg?v=1718364223"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-for-eos-aps-c-cameras","title":"Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for EOS APS-C Cameras","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR Clip-Filter EOS APS-C\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Takahashi Epsilon Astrographs.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines—oxygen (OIII), hydrogen (H-alpha), and sulfur (SII)—you may select filters with either 12nm or 6nm bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e\nOur new MaxFR filters are designed to work perfectly with fast optical systems. The MFR Coating technique provides the best out-of-band blocking possible across the range of wavelengths from UV to IR. The new design offers \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. Astronomik MFR narrowband-emission line filters provide the best data quality for producing stunning final images.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, with about 85% maximum transmission at f\/1.4 guaranteed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with about 90% maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nNarrowband-emission line filters are perfect for observing from light-polluted areas. H-alpha filters should be your first step into narrowband astrophotography, allowing deep, contrast-rich images even in severe light pollution or under a full moon. H-alpha filters are ideal for capturing red-glowing nebulae. OIII filters enable imaging of greenish-blue structures, such as planetary nebulae and star-forming regions. SII filters complete your HSO set, letting you process your images like those taken by the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Use 12nm filters on systems as fast as f\/1.4, and 6nm filters as fast as f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made from stress- and striae-free, optically polished glass. The filters consist of ultra-thin layers on the substrate.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal, with thickness tolerances that prevent the focal plane from shifting when changing filters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Coated on both sides with up to 170 layers for anti-reflection properties.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and designed to last for years without degradation. Every Astronomik filter will deliver full performance and meet specifications even after years of use.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete blocking from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box.\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e thanks to our outstanding coating technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou’ll get the highest quality with every Astronomik filter, enhancing your imaging possibilities. These filters provide long-lasting performance, working as well as when they were brand new. With our special coating, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all optical systems.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821394403505,"sku":"8H11DQ","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-eos-aps-c-814499.jpg?v=1718364261"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-for-eos-xl-cameras","title":"Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for EOS XL Cameras","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR Clip-Filter EOS XL\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines—oxygen (OIII), hydrogen (H-alpha), and sulfur (SII)—you may select filters with either 12nm or 6nm bandwidth (FWHM)\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in, well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from UV to IR! Your advantage is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters provide the best quality data, making them the ideal starting material for an awesome final image!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, with about 85% maximum transmission at f\/1.4 guaranteed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with about 90% maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003eImaging with narrowband-emission line filters is the best way to take great images from light-polluted sites, as they effectively block all kinds of light pollution. An H-alpha filter should be your first step into narrowband astrophotography! You can capture deep and contrast-rich images, even with heavy light pollution or a full moon in the sky. H-alpha is perfect for capturing nebulae glowing red! An OIII filter expands your imaging capabilities by allowing you to capture greenish\/blueish structures, like planetary nebulae and star-forming regions. The SII filter completes your HSO filter set, letting you process your images like those from the Hubble Space Telescope.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters work on systems as fast as f\/1.4, and the 6nm filters as fast as f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made from stress- and striae-free, optically polished glass. The filters consist of ultra-thin layers on the substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal, with thickness tolerances that prevent the focal plane from shifting when changing filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Coated on both sides with up to 170 layers for anti-reflection properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and designed to last for years without degradation. Every Astronomik filter will deliver full performance and meet specifications even after years of use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete blocking from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e thanks to our outstanding coating technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou’ll get the highest quality with every Astronomik filter, enhancing your imaging possibilities. These filters provide long-lasting performance, working as well as when they were brand new. With our special coating, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all optical systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me—12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt depends on your setup. For DSLR cameras and dark-current-limited cameras, 12nm filters are ideal. For extreme light pollution and cameras with low dark current, 6nm filters provide better contrast and star reduction, making them suitable for deep imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow does exposure time change with narrowband filters?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUsing narrowband filters doesn’t necessarily require longer exposure times, but you can extend exposure to record fainter details without unwanted light interference. 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The Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines—oxygen (OIII), hydrogen (H-alpha), and sulfur (SII)—you may select filters with either 12nm or 6nm bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e\nOur new MaxFR filters are designed to work perfectly with fast optical systems. The MFR Coating technique provides the best out-of-band blocking possible across the range of wavelengths from UV to IR. The new design offers \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. Astronomik MFR narrowband-emission line filters provide the best data quality for producing stunning final images.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, with about 85% maximum transmission at f\/1.4 guaranteed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with about 90% maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nNarrowband-emission line filters are perfect for observing from light-polluted areas. H-alpha filters should be your first step into narrowband astrophotography, allowing deep, contrast-rich images even in severe light pollution or under a full moon. H-alpha filters are ideal for capturing red-glowing nebulae. OIII filters enable imaging of greenish-blue structures, such as planetary nebulae and star-forming regions. SII filters complete your HSO set, letting you process your images like those taken by the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Use 12nm filters on systems as fast as f\/1.4, and 6nm filters as fast as f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made from stress- and striae-free, optically polished glass. The filters consist of ultra-thin layers on the substrate.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal, with thickness tolerances that prevent the focal plane from shifting when changing filters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Coated on both sides with up to 170 layers for anti-reflection properties.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and designed to last for years without degradation. Every Astronomik filter will deliver full performance and meet specifications even after years of use.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete blocking from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box.\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e thanks to our outstanding coating technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou’ll get the highest quality with every Astronomik filter, enhancing your imaging possibilities. These filters provide long-lasting performance, working as well as when they were brand new. With our special coating, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all optical systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best FWHM for me – 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIt depends on your setup. For DSLR cameras and dark-current-limited cameras, 12nm filters are ideal. For extreme light pollution and cameras with low dark current, 6nm filters provide better contrast and star reduction, making them suitable for deep imaging.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow does exposure time change with narrowband filters?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eUsing narrowband filters doesn’t necessarily require longer exposure times, but you can extend exposure to record fainter details without unwanted light interference. This results in clearer images, even from light-polluted areas.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR Filters for Fast Optical Systems\u003c\/strong\u003e\u003cbr\u003eChoose the size and FWHM that fit your setup, and start capturing stunning deep-sky images today.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821395648689,"sku":"8H11F1","price":627.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-eos-r-xl-756622.jpg?v=1718364249"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-for-sony-alpha-7","title":"Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for Sony Alpha 7","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR Clip-Filter Sony alpha 7\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003e There is an ever growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e MaxFR SIII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\n\u003c\/li\u003e\n\t\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light polluted sites (like most of us), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotographs, an H-alpha filter is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers, which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade with age. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping, even after many years.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with this coating!)\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\t\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\t\u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will enormously expand your imaging possibilities! You are investing your money in an accessory that will work for many years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade with age, and with the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up often in emails or when talking to customers at fairs. A general \"right,\" \"wrong,\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars become very tiny points, and most faint stars do not show up anymore! This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nIn short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don't have to expose longer, but you MAY expose longer!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of, for example, \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record, makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do an exposure of 30 sec without any filters from a light-polluted urban observing site, your sky-background might already be very bright or even saturated. The same image taken with a Narrowband Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer—probably 30 min instead—to record fainter structures! So it’s not a \"must,\" it’s a \"can.\"\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821457711281,"sku":"8H11F4","price":627.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-sony-alpha-7-302445.jpg?v=1718364246"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-for-nikon-xl-cameras","title":"Astronomik H-alpha 6nm CCD MaxFR Clip-Filter for Nikon XL Cameras","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR Clip-Filter Nikon XL\u003c\/h1\u003e\n\u003ch4\u003eOptimized Narrowband Emission Line Filters for Fast Optical Systems\u003c\/h4\u003e\n\u003cp\u003eExperience unparalleled performance in deep-sky imaging with Astronomik’s MaxFR filters, designed specifically for fast optical systems like Celestron RASA and Takahashi Epsilon Astrographs. These filters are available in 6nm and 12nm bandwidths (FWHM), providing high-contrast imaging for H-alpha, OIII, and SII emission lines.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose MaxFR H-alpha, OIII, and SII CCD Filters?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAvailable in 6nm and 12nm FWHM for maximum flexibility\u003c\/li\u003e\n\u003cli\u003eDesigned for use with fast optics (f\/1.7 and higher)\u003c\/li\u003e\n\u003cli\u003eHighest contrast with minimized stray light and needle-sharp stars\u003c\/li\u003e\n\u003cli\u003eIdeal for astrophotography of nebulae and planetary nebulae\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaximum Contrast and High Transmission\u003c\/h3\u003e\n\u003cp\u003eAstronomik MaxFR filters use advanced MFR Coating technology to provide the best out-of-band blocking, from UV to IR. This technology ensures you experience no halos and maximum contrast, even in heavily light-polluted environments.\u003c\/p\u003e\n\n\u003ch3\u003eImaging with Narrowband Filters\u003c\/h3\u003e\n\u003cp\u003eWhen imaging from light-polluted areas, narrowband filters such as H-alpha and OIII allow you to block unwanted light pollution. H-alpha is perfect for capturing the red glow of nebulae, while OIII brings out the blue-green light of planetary nebulae. Pair these filters with an SII filter to create stunning, Hubble-style images of deep-sky objects.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures of Astronomik Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Usable on instruments down to f\/1.4 for 12nm filters and f\/2 for 6nm filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptically Polished Glass:\u003c\/strong\u003e Stress-free and striae-free substrate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal:\u003c\/strong\u003e No refocusing needed when switching filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and long-lasting performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete UV to IR blocking without additional filters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm square\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich FWHM should I choose, 6nm or 12nm?\u003c\/strong\u003e If you're imaging in heavily light-polluted areas, 6nm offers better contrast, while 12nm allows for more stars in your field of view.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eExpand your astrophotography capabilities with Astronomik MaxFR filters, designed to provide exceptional results even in the most challenging conditions. Perfect for imaging nebulae, planetary nebulae, and star-forming regions with stunning clarity.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821464199345,"sku":"8H11F3","price":627.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-nikon-xl-529309.jpg?v=1718364233"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-nikon-z-xl","title":"Astronomik H-alpha 6nm CCD MaxFR Clip-Filter Nikon Z XL","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR Clip-Filter Nikon Z XL\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA or the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in, well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage with our new design is \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters give you the best quality data: the best start material to be processed into an awesome final image!\u003cbr\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8, and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be effectively blocked! Normally, an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotographs, an H-alpha filter is the best choice for all nebulae glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you can process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, and the 6nm filters down to f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Par focal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers, which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade with age. Every Astronomik filter will deliver full performance and meet the specs at the point of shipping, even after lots of years.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the entire spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with MFR coating!)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade with age, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up in emails or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nTo put it short: 12nm Filters are the right choice for all DSLRs and dark-current-limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don't have to expose longer, but you MAY expose longer!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of, for example, \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record, makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do a 30-second exposure without any filters from a light-polluted urban observing site, your sky-background might already be very, very bright or even saturated. The same image taken with a Narrowband Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer - probably 30 min instead - to record fainter structures! So it’s not a \"must,\" it’s a \"can\".\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821464985777,"sku":"8H11LD","price":627.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-clip-filter-nikon-z-xl-411848.jpg?v=1718364248"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-filter-high-contrast-for-fast-optics","title":"Astronomik H-alpha 6nm CCD MaxFR Filter – High Contrast for Fast Optics","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR 31mm Filter – Perfect for Fast Optics\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik Filters: Ideal for Ultra-Fast Optical Systems.\u003c\/h4\u003e\n\u003ch4\u003eDesigned to meet the increasing demand for filters compatible with ultra-fast optics, including Celestron RASA and Takahashi Epsilon Astrographs.\u003c\/h4\u003e\n\u003ch4\u003eOur Astronomik MaxFR filters are perfect for deep-sky astrophotography with fast systems, ensuring exceptional performance for the three key emission lines: Oxygen (OIII), Hydrogen (H-alpha), and Sulfur (SII). Choose between 6nm or 12nm bandwidth options (FWHM) for these emission lines.\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eHighest Transmission with MaxFR Filters\u003c\/strong\u003e\u003cbr\u003eOur advanced MFR Coating ensures superior out-of-band blocking, from UV to IR wavelengths. Benefit from extreme contrast, minimized stray light, no halos, and pin-sharp stars with the Astronomik MFR narrowband filters. This means you’ll start with the best raw data, ensuring stunning final images.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12nm Filters:\u003c\/strong\u003e Fully usable from f\/1.7 to f\/8 with around 85% transmission at f\/1.4.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6nm Filters:\u003c\/strong\u003e Fully usable from f\/2.2 to f\/8 with about 90% transmission at f\/2.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter blocks unwanted H-alpha and NII (nitrogen) light effectively.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose Narrowband Filters?\u003c\/strong\u003e\u003cbr\u003eNarrowband filters are a great solution for imaging in light-polluted areas. An H-alpha filter should be your first step into this type of astrophotography. It enables deep and contrast-rich images, even under heavy light pollution or a full moon. H-alpha filters are ideal for capturing nebulae that emit red light. The OIII filter allows you to capture greenish-blue structures, such as planetary nebulae and star-forming regions. With the SII filter, you’ll complete the HSO set for Hubble Space Telescope-style imaging!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAstronomik MFR Filters: Uncompromising Quality\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e Use 12nm filters on systems as fast as f\/1.4 and 6nm filters as fast as f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Glass:\u003c\/strong\u003e Astronomik filters use striae-free, optically polished glass for minimal distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal:\u003c\/strong\u003e No refocusing is needed when switching filters due to precise thickness tolerances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e These filters are scratch-resistant, moisture-proof, and built to last without performance degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Blocking:\u003c\/strong\u003e Complete blocking from UV to IR wavelengths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Performance:\u003c\/strong\u003e Every filter includes a 10-year guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInvest in the best: Astronomik filters are designed to expand your imaging capabilities while delivering lasting value. They perform exceptionally well, even after many years of use, ensuring that your filters provide the same quality as the day you bought them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e12nm or 6nm? What’s the difference?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt depends on your setup. 12nm filters are the best choice for DSLRs and dark-current-limited cameras, while 6nm filters are better for extreme light pollution and cameras with low dark current, allowing deeper imaging and star reduction.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDoes using narrowband filters require longer exposure times?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhile you don't have to extend exposure times, using narrowband filters allows you to do so without unwanted light interference. This means clearer images and deeper contrast, even in light-polluted environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR Filters for Fast Optical Systems\u003c\/strong\u003e\u003cbr\u003eExplore our selection of filters to find the right size and FWHM for your setup and start capturing extraordinary deep-sky images today.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821476520113,"sku":"8H11H4","price":304.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-h-alpha-6nm-ccd-maxfr-31mm-398949.jpg?v=1718364248"},{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-50mm-high-contrast-for-fast-optics","title":"Astronomik H-alpha 6nm CCD MaxFR 50mm – High Contrast for Fast Optics","description":"\u003ch1\u003eAstronomik H-alpha 6nm CCD MaxFR 50mm\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e\n\u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron's RASA and Takahashi's Epsilon Astrographs.\u003c\/h4\u003e\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable for very fast focal ratios. The Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines—oxygen (OIII), hydrogen (H-alpha), and sulphur (SII)—you may select filters with either 12nm or 6nm bandwidth (FWHM).\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003eOur new MaxFR filters are designed to work perfectly with fast optical systems. The MFR Coating technique provides the best out-of-band blocking possible across the range of wavelengths from UV to IR. The new design offers \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. Astronomik MFR narrowband-emission line filters provide the best data quality for producing stunning final images.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12nm MaxFR filters:\u003c\/strong\u003e Usable from f\/1.7 to f\/8, with about 85% maximum transmission at f\/1.4 guaranteed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6nm MaxFR filters:\u003c\/strong\u003e Usable from f\/2.2 to f\/8, with about 90% maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emission Line Filters\u003c\/strong\u003e\u003cbr\u003eNarrowband-emission line filters are perfect for observing from light-polluted areas. H-alpha filters should be your first step into narrowband astrophotography, allowing deep, contrast-rich images even in severe light pollution or under a full moon. H-alpha filters are ideal for capturing red-glowing nebulae. OIII filters enable imaging of greenish-blue structures, such as planetary nebulae and star-forming regions. SII filters complete your HSO set, letting you process your images like those taken by the Hubble Space Telescope!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters work on systems as fast as f\/1.4, and the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made from stress- and striae-free, optically polished glass. The filters consist of ultra-thin layers on the substrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik filters are parfocal, with thickness tolerances that prevent the focal plane from shifting when changing filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Coated on both sides with up to 170 layers for anti-reflection properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Scratch-resistant, moisture-proof, and designed to last for years without degradation. Every Astronomik filter will deliver full performance and meet specifications even after years of use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Complete blocking from UV to IR, eliminating the need for additional UV \u0026amp; IR blockers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e From 1.25\" to 50mm x 50mm square filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e thanks to our outstanding coating technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou’ll get the highest quality with every Astronomik filter, enhancing your imaging possibilities. These filters provide long-lasting performance, working as well as when they were brand new. With our special coating, the filters do not degrade over time, and the MFR coating ensures compatibility with nearly all optical systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best FWHM for me – 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt depends on your setup. For DSLR cameras and dark-current-limited cameras, 12nm filters are ideal. For extreme light pollution and cameras with low dark current, 6nm filters provide better contrast and star reduction, making them suitable for deep imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow does exposure time change with narrowband filters?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUsing narrowband filters doesn’t necessarily require longer exposure times, but you can extend exposure to record fainter details without unwanted light interference. 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The new Astronomik MaxFR series of narrowband emission line filters are perfectly matched for deep-sky imaging with fast optical systems. You can select either 12nm or 6nm bandwidth (FWHM) for oxygen (OIII), hydrogen (H-alpha), and sulfur (SII) emission lines.\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003cbr\u003e \nThe Astronomik MaxFR filters are crafted to work flawlessly with fast optical systems. The MFR Coating technique provides optimal out-of-band blocking from UV to IR wavelengths. You get high contrast, minimized stray light, no halos, and needle-sharp stars. These filters give you the best data for processing into stunning final images.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters:\u003c\/strong\u003e Unrestricted usability from f\/1.7 to f\/8, with around 85% of the maximum transmission guaranteed at f\/1.4.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor 6nm MaxFR filters:\u003c\/strong\u003e Unrestricted usability from f\/2.2 to f\/8, with approximately 90% of the maximum transmission at f\/2 guaranteed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband Emission Line Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you must observe from light-polluted areas, narrowband emission line filters are excellent for capturing great images. These filters effectively block all forms of light pollution. An H-alpha filter should be your first step into narrowband astrophotography, allowing you to capture deep, high-contrast images even in heavily light-polluted skies or with the full moon in view. OIII filters extend your imaging possibilities by capturing greenish\/blueish structures like planetary nebulae and star-forming regions. The SII filter completes the HSO set, giving you the ability to produce images similar to those from the Hubble Space Telescope.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used on all instruments down to f\/1.4, while the 6nm filters work down to f\/2.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Made with stress-free, striae-free, optically polished glass. The filter itself consists of ultra-thin layers on this substrate.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are parfocal, meaning the focal plane does not shift when changing filters due to the small thickness tolerance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters have up to 170 layers on both sides of the substrate. These layers act as an anti-reflection coating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Highly scratch-resistant, not sensitive to moisture, and does not degrade over time. Each filter performs optimally and meets specifications even after years of use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light from UV to IR is blocked, so there's no need for additional UV or IR blockers with these filters.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes:\u003c\/strong\u003e From 1.25\" to square 50mm x 50mm filters.\u003c\/li\u003e\n  \u003cli\u003eDelivered in a high-quality protection and storage box.\u003c\/li\u003e\n  \u003cli\u003eIncludes a 10-year guarantee thanks to outstanding coating techniques.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently asked questions about Narrowband Emission Line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eWhich full-width-half-maximum (FWHM) is best for me, 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis depends on your equipment and observing site. If your camera has extremely low dark current and effective cooling, the 6nm filters offer major advantages by blocking more background light and allowing longer exposures for deeper images. For DSLRs or dark-current limited cameras, 12nm filters are generally more suitable. The 6nm filters are best for sites with heavy light pollution, low-dark current cameras, and objects requiring maximum contrast and star reduction.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWith high transmission (close to 100% at the center wavelength), nearly all emission line photons reach the sensor. However, exposure time can be extended to record fainter structures, as unwanted light from other wavelengths is effectively blocked.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSelecting filters:\u003c\/strong\u003e\u003cbr\u003e\nChoose the size and FWHM that match your setup for a list of available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821489922225,"sku":"8H11I8","price":152.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-125-m285-292397.jpg?v=1718364229"},{"product_id":"astronomik-sii-12nm-ccd-maxfr-2-m48-filter-for-fast-optical-systems","title":"Astronomik SII 12nm CCD MaxFR 2'' (M48) Filter for Fast Optical Systems","description":"\u003ch1\u003eAstronomik SII 12nm CCD MaxFR 2'' (M48)\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003e There is an ever growing demand for filters suitable for extremly fast optical systems like Celestron's RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfect matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is an \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to an awesome final image!\u003cbr\u003e\n\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally, an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotographs, an H-alpha is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebula and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after lots of years.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n    \u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10 year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money for an accessory that will work for lots of years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question which full-width-half-maximum (FWHM) is the \"best\", shows up in Emails on our monitor or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are very tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nTo put it short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extreme strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don't have to expose longer, but you MAY expose longer!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of, for example, \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record makes the effect of the filter clear: The combination of a very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 sec without any filters from a light-polluted urban observing site, your sky background might be very, very bright or even saturated. The same image taken with a Narrowband Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you have the possibility to expose longer -probably 30 min instead- to record fainter structures! So it's not a \"must\", it's a \"can\".\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821522264241,"sku":"8H11I9","price":358.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-2-m48-198330.jpg?v=1718364445"},{"product_id":"astronomik-sii-12nm-ccd-maxfr-clip-filter-eos-aps-c-for-fast-optics","title":"Astronomik SII 12nm CCD MaxFR Clip-Filter EOS APS-C for Fast Optics","description":"\u003ch1\u003eAstronomik SII 12nm CCD MaxFR Clip-Filter EOS APS-C\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003e There is an ever growing demand for filters suitable for extremly fast optical systems like Celestron´s RASA the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha) and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR SIII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eextremly high contrast\u003c\/strong\u003e, minimized stray light,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eno halos\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to a awesome final image!\u003cbr\u003e\n \u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e\n\t \u003c\/li\u003e\n\t\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally an H-alpha filter should be your first step into this amazing field of astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotographs, an H-alpha is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filters complete your HSO set of filters. With these three filters, you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are parfocal! Due to the very small thickness tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: Due to our coating technique all Astronomik filters are highly scratch resistant, not sensitive to moisture, and do not degrade with age. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after lots of years.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\t\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\t\u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work for lots of years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade with age, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question which full-width-half-maximum (FWHM) is the \"best\", shows up in Emails on our monitor or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background you will be able to expose longer and get deeper images! All stars are very tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nTo put it short: 12nm Filters are the right choice for all DSLR’s and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don’t have to expose longer, but you MAY expose longer!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of for example \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record makes the effect of the filter clear: The combination of a very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 sec without any filters from a light-polluted urban observing site, your sky background might be already very bright or even saturated. The same image taken with a Narrowband Emission line filter will give you a perfect black background without any signal and the signal from the object will be about the same. With this black background, you have the possibility to expose longer -probably 30 min instead- to record fainter structures! So it’s not a \"must\", it’s a \"can\".\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821525967025,"sku":"8H11I7","price":241.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-clip-filter-eos-aps-c-781731.jpg?v=1718364241"},{"product_id":"astronomik-sii-12nm-ccd-maxfr-clip-filter-for-eos-r-xl","title":"Astronomik SII 12nm CCD MaxFR Clip-Filter for EOS R XL","description":"\u003ch1\u003eAstronomik SII 12nm CCD MaxFR Clip-Filter EOS R XL\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003e There is an ever growing demand for filters suitable for extremly fast optical systems like Celestron´s RASA the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfect matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha) and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e MaxFR SIII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a \u003cstrong\u003eextremly high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to a awesome final image!\u003cbr\u003e\n \u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters this means a unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at a f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e\n\t \u003c\/li\u003e\n\t\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means a unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kind of light pollution can be blocked very effective! Normally an H-alpha filter should be your first step into this amazing field of Astrophotography ! With an Narrowband H-alpha filter you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other Astrophotosgraphs an H-alpha is the best choice for all nebula glowing red! An OIII filters expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebula and star forming regions are great targets! The SII filters completes your HSO-set of filters. With these three filters you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae free, optically polished glass. The filter itself is made of ultra thin layers on this substrate!\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness-tolerance the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as a Anti-Reflection Coating.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: Due to our coating technique all Astronomik filters are highly scratch resistant, not sensitive to moisture and do not degrade when getting older. Every Astronomik filter will deliver it´s full performance and meet the specs at the point of shipping even after lot´s of years.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eIntegated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1,25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\t\u003cli\u003eDelivered in a\u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\t\u003cli\u003eDue to our outstanding coating technique we do offer a\u003cstrong\u003e10 year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormous! You are investing your money for an accessory which will work in lot´s of years in the same ways it did when it was brand new. Due to our special coating technique the filters do not degrade when getting older, and due to the new MFR coating you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question which full-width-half-maximum (FWHM) is the \"best\", shows up on in Emails on our monitor or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background you will be able to expose longer and get deeper images! All stars are very tiny points, most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the milky way!\u003cbr\u003e\nTo put it short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extreme strong light pollution, cameras with low dark-current and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don have to expose longer, but you MAY expose longer!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength nearly all emission line photons reach the sensor. So the number of for example \"H-alpha-photons\" does not change significant weather a H-alpha filter is installed or not. But looking at the photons of other wavelength, which we do NOT want to record makes the effect of the filter clear: The combination of a very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do an exposure of 30 sec without any filters from a light polluted urban observing site, your sky-background might be already very, very bright or even saturated. The same image taken with an Narrowband -Emission line filter will give you a perfect black background without any signal and the signal from the object will be about the same. With this black background you have the possibility to expose longer -probably 30 min instead- to record fainter structures! So it´s not a \"must\", it´s a \"can\".\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821531603121,"sku":"8H11IA","price":403.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-clip-filter-eos-r-xl-340005.jpg?v=1718364230"},{"product_id":"astronomik-sii-12nm-ccd-maxfr-clip-filter-sony-alpha-7","title":"Astronomik SII 12nm CCD MaxFR Clip-Filter Sony alpha 7","description":"\u003ch1\u003eAstronomik SII 12nm CCD MaxFR Clip-Filter Sony alpha 7\u003c\/h1\u003e\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\u003ch4\u003e There is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron´s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters with either 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e MaxFR SIII-CCD filter\u003cbr\u003e6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eno halos\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to an awesome final image!\u003cbr\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters, this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at a f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e \u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters, this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003eIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003eIf you look at other Astrophotographs, an H-alpha is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebula and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you are able to process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAstronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll Astronomik Filters are Parfocal! Due to the very small thickness tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAstronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after lots of years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with  coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efrom 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDue to our outstanding coating technique, we offer a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10-year guarantee\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eon all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money in an accessory that will work in lots of years in the same way it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up in emails and at fairs often. A general \"right\" or \"wrong\" or \"best\" does not make sense. We would not offer both series if they were not needed.\u003cbr\u003eIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are tiny points, and most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003eTo put it short: 12nm Filters are the right choice for all DSLR's and dark-current limited cameras.\u003cbr\u003e6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require maximum contrast and star-reduction possible!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don’t have to expose longer, but you MAY expose longer!\u003cbr\u003eDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of, for example, \"H-alpha-photons\" does not change significantly whether an H-alpha filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record, makes the effect of the filter clear: The combination of very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do an exposure of 30 sec without any filters from a light-polluted urban observing site, your sky-background might already be very bright or even saturated. The same image taken with a Narrowband -Emission line filter will give you a perfect black background without any signal and the signal from the object will be about the same. With this black background, you have the possibility to expose longer -probably 30 min instead- to record fainter structures! So it’s not a \"must\", it’s a \"can\".\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003ePlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821536944305,"sku":"8H11ID","price":403.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-clip-filter-sony-alpha-7-439497.jpg?v=1718364251"},{"product_id":"astronomik-sii-12nm-ccd-maxfr-31mm-filter-for-fast-systems","title":"Astronomik SII 12nm CCD MaxFR 31mm Filter for Fast Systems","description":"\u003ch1\u003eAstronomik SII 12nm CCD MaxFR 31mm\u003c\/h1\u003e\n\n\u003ch4\u003eMaxFR Astronomik photographic narrowband-emissionline filters for fast optical systems.\u003c\/h4\u003e\n\n\u003ch4\u003e There is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron´s RASA and the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e\n\n\u003ch4\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfectly matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha), and sulfur (SII), you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR OIII-CCD filter\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaxFR H-alpha-CCD filter\u003c\/strong\u003e\u003cbr\u003e\n\u003cspan\u003e6nm and 12nm FWHM\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e MaxFR SIII-CCD filter\u003cbr\u003e\n6nm and 12nm FWHM\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well-known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is an \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, minimized stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e and \u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emission line filters give you the best quality of data: The best start material to be processed into an awesome final image!\u003cbr\u003e\n \u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters this means unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at f\/1.4 as guaranteed.\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor maximum contrast, the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003e\nIf you have to observe from light-polluted sites (like most of us...), imaging with narrowband-emission line filters is the best way to take great images, as all kinds of light pollution can be blocked very effectively! Normally an H-alpha filter should be your first step into this amazing field of Astrophotography! With a Narrowband H-alpha filter, you will be able to take deep and contrasting images even with very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003e\nIf you look at other astrophotographs, an H-alpha filter is the best choice for all nebula glowing red! An OIII filter expands your imaging possibilities, as you can image all greenish\/blueish structures. Planetary nebulae and star-forming regions are great targets! The SII filter completes your HSO-set of filters. With these three filters, you can process your images like the ones from the Hubble Space Telescope!\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emission line filters:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are Parfocal! Due to the very small thickness tolerance, the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Astronomik filters are made of up to 170 layers, coated on both sides of the substrate. These layers form the filter itself and act as an Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Due to our coating technique, all Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade when getting older. Every Astronomik filter will deliver its full performance and meet the specs at the point of shipping even after years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e All unwanted light is blocked in the whole spectral range from UV up to IR! (You will not need an additional UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emission line filters with coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e from 1.25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a \u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDue to our outstanding coating technique, we offer a \u003cstrong\u003e10-year guarantee\u003c\/strong\u003e on all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especially the filters against light pollution and the narrowband-emission line filters will expand your imaging possibilities enormously! You are investing your money for an accessory that will work for many years in the same way as it did when it was brand new. Due to our special coating technique, the filters do not degrade when getting older, and due to the new MFR coating, you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical questions asked by customers looking for Narrowband-Emission line Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe question of which full-width-half-maximum (FWHM) is the \"best\" shows up often in emails or when talking to customers at fairs. A general \"right,\" \"wrong,\" or \"best\" does not make sense. We would not offer both series if they were not needed.\u003cbr\u003e\nIf you have a camera with an extremely low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background, you will be able to expose longer and get deeper images! All stars are tiny points; most faint stars do not show up anymore! This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the Milky Way!\u003cbr\u003e\nTo put it shortly: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e\n6nm filters are the best choice for observing sites with extremely strong light pollution, cameras with low dark-current, and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis question is asked quite often, and the answer is very simple: You don’t have to expose longer, but you MAY expose longer!\u003cbr\u003e\nDue to the high transmission of approximately 100% at the center wavelength, nearly all emission line photons reach the sensor. So the number of \"H-alpha-photons,\" for example, does not change significantly whether a filter is installed or not. But looking at the photons of other wavelengths, which we do NOT want to record, makes the filter's effect clear: The combination of excellent blocking of all unwanted light from UV to IR and the narrow bandwidth of the filters reduces all unwanted signals on the sensor! If you do a 30-sec exposure without any filters from a light-polluted urban observing site, your sky-background might already be very bright or even saturated. The same image taken with a Narrowband-Emission line filter will give you a perfect black background without any signal, and the signal from the object will be about the same. With this black background, you can expose longer, probably 30 min instead, to record fainter structures! So it’s not a \"must,\" it’s a \"can\".\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSelection of filters:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\nPlease select the matching size for your setup and the FWHM to get a list of all available filters.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821538255025,"sku":"8H11I4","price":206.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-31mm-507041.jpg?v=1718364244"},{"product_id":"astronomik-sii-12nm-ccd-maxfr-36mm-high-contrast-imaging-filter","title":"Astronomik SII 12nm CCD MaxFR 36mm - High Contrast Imaging Filter","description":"\u003ch1\u003eAstronomik SII 12nm CCD MaxFR 36mm\u003c\/h1\u003e \u003ch4\u003eMaxFR Astronomik photographic narrowband-emission line filters for fast optical systems.\u003c\/h4\u003e \u003ch4\u003eThere is an ever-growing demand for filters suitable for extremely fast optical systems like Celestron’s RASA or the Epsilon Astrographs made by Takahashi.\u003c\/h4\u003e \u003ch4\u003eOur novel MaxFR emission line filters are ideal for very fast focal ratios. The new Astronomik MaxFR series of narrowband-emission line filters is perfectly matched to the needs of astronomical deep-sky imaging with fast optical systems. You may select your filters either with 12nm or 6nm Bandwidth (FWHM) for the three most important emission lines: oxygen (OIII), hydrogen (H-alpha), and sulfur (SII).\u003c\/h4\u003e \u003cp\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eOur new MaxFR filters are made with an entirely new design, optimized for fast optical systems. The well-known MFR Coating technology ensures excellent out-of-band blocking, covering the full wavelength range from UV to IR! The new design delivers \u003cstrong\u003eextremely high contrast\u003c\/strong\u003e, reduced stray light, \u003cstrong\u003eno halos\u003c\/strong\u003e, and \u003cstrong\u003epinpoint stars\u003c\/strong\u003e. Astronomik MFR narrowband-emission line filters provide the best quality data for producing outstanding final images!\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFor 12nm MaxFR filters:\u003c\/strong\u003e They are usable from f\/1.7 to f\/8, providing about 85% of maximum transmission at f\/1.4 as guaranteed.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFor 6nm MaxFR filters:\u003c\/strong\u003e They work from f\/2.2 to f\/8, with about 90% of maximum transmission at f\/2, ensuring top performance.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eTo achieve maximum contrast, the SII filter is carefully engineered to block all light from H-alpha and NII (nitrogen).\u003c\/p\u003e \u003ch4\u003eImaging with Narrowband-Emission Line Filters\u003c\/h4\u003e \u003cp\u003eIf you observe from light-polluted areas, narrowband-emission line filters can help you take great images by effectively blocking light pollution. Normally, an H-alpha filter is the first step into this amazing field of astrophotography. A Narrowband H-alpha filter enables you to capture deep, high-contrast images even in areas with heavy light pollution or a full moon in the sky!\u003c\/p\u003e \u003cp\u003eAn H-alpha filter is the best choice for all red-glowing nebulae, while an OIII filter expands your imaging possibilities, allowing you to capture greenish\/blueish structures in planetary nebulae and star-forming regions. The SII filter completes your HSO filter set. With these three filters, you can process your images to achieve results similar to those of the Hubble Space Telescope!\u003c\/p\u003e \u003ch4\u003eQuality Aspects of the New Astronomik MFR Narrowband-Emission Line Filters:\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e The 12nm filters can be used with all instruments down to f\/1.4, while the 6nm filters are usable down to f\/2.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e Astronomik filters are made with stress- and striae-free, optically polished glass. The filter itself is made of ultra-thin layers on this substrate!\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e All Astronomik Filters are parfocal! Due to the very small thickness tolerance, the focal plane does not shift when changing filters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Thanks to our coating technique, Astronomik filters are highly scratch-resistant, not sensitive to moisture, and do not degrade over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntegrated Blocking:\u003c\/strong\u003e Unwanted light is blocked across the whole spectral range from UV to IR.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e Sizes range from 1.25\" up to 50mm x 50mm filters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-Quality Storage:\u003c\/strong\u003e Each filter is delivered in a high-quality protection and storage box.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLong-Term Guarantee:\u003c\/strong\u003e We offer a 10-year guarantee on all Astronomik filters.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eYou get the highest quality possible with every single Astronomik filter to ensure perfect images with your equipment! Especially with filters designed to block light pollution, your imaging possibilities are greatly enhanced. Your investment in these filters will last for many years, as our special coating technique ensures they do not degrade with age. The new MFR coating allows you to use the filter on nearly all optical instruments!\u003c\/p\u003e \u003ch4\u003eFrequently Asked Questions About Narrowband-Emission Line Filters:\u003c\/h4\u003e \u003cul\u003e \u003cli\u003e\u003cstrong\u003eWhich FWHM is best: 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eChoosing between 12nm or 6nm depends on your imaging setup and location. If you have a camera with extremely low dark current and effective cooling, 6nm filters offer significant advantages. The stronger background blocking lets you expose longer and capture deeper images with pinpoint stars. However, 12nm filters are ideal for DSLRs and cameras limited by dark current, providing great results without such high cooling needs. 6nm filters are better suited for heavily light-polluted sites or when targeting weak objects requiring maximum contrast.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cstrong\u003eHow much does the exposure time increase?\u003c\/strong\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eExposure times do not necessarily have to increase, but they can! With the high transmission (close to 100% at the center wavelength), most emission line photons reach the sensor regardless of the filter. However, unwanted light at other wavelengths is reduced, allowing you to take longer exposures if needed. For example, if an unfiltered image takes 30 seconds to saturate the sky background in a light-polluted area, the same image with a narrowband filter can result in a perfect black background, allowing you to extend the exposure time and capture faint structures more effectively.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFilter Selection:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003ePlease select the appropriate size and FWHM for your setup to find the available filters.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":41821539860657,"sku":"8H11I5","price":223.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-sii-12nm-ccd-maxfr-36mm-901194.jpg?v=1718364247"},{"product_id":"astronomik-deep-sky-rgb-filterset-1-25-perfect-for-astrophotography","title":"Astronomik Deep-Sky RGB Filterset 1.25\" – Perfect for Astrophotography","description":"\u003ch1\u003eAstronomik Deep-Sky RGB Filterset 1.25\" (M28.5), 3 filters\u003c\/h1\u003e\n\u003cp\u003eThe Astronomik Deep-Sky RGB Filterset in 1.25\" (M28.5) size fits perfectly in filter wheels of leading brands such as ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian, and Atik. These filters maintain optimal performance regardless of their orientation in the filter wheel.\u003c\/p\u003e\n\u003ch2\u003eAstronomik Deep-Sky RGB Filters for Imaging\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe new Astronomik Deep-Sky RGB filters are designed for high-performance deep-sky imaging with CCD cameras.\u003c\/strong\u003e These filters provide superior imaging results, delivering sharpness, contrast, and vivid colors for breathtaking astrophotography.\u003c\/p\u003e\n\u003ch3\u003eKey Features of Astronomik Deep-Sky RGB Filters:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUp to 95% transmission for optimal light capture\u003c\/li\u003e\n\u003cli\u003eUltra-sharp, pinpoint star images\u003c\/li\u003e\n\u003cli\u003eHigh contrast for stunning detail\u003c\/li\u003e\n\u003cli\u003eData that's easy to process for vivid colors\u003c\/li\u003e\n\u003cli\u003eOptimized spectral windows for maximum sensor photon capture\u003c\/li\u003e\n\u003cli\u003eCrafted from high-quality, optically polished glass\u003c\/li\u003e\n\u003cli\u003eDurable, scratch-resistant coating\u003c\/li\u003e\n\u003cli\u003eMFR Coating technique for compatibility with a range of focal ratios\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance of Astronomik Deep-Sky RGB Filters\u003c\/h3\u003e\n\u003cp\u003eAfter extensive research and development, the \u003cstrong\u003eAstronomik Deep-Sky RGB filters\u003c\/strong\u003e are crafted to deliver vivid colors with excellent emission line contrast. 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These filters offer exceptional sharpness, contrast, and vivid colors, optimized for maximum photon counts on CCD sensors. The filters also allow for easy data processing with vibrant, realistic colors in the final image.\u003c\/p\u003e\n\n  \u003ch4\u003eKey Features:\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eUp to 95% transmission for maximum light collection\u003c\/li\u003e\n    \u003cli\u003ePinpoint star images for enhanced sharpness\u003c\/li\u003e\n    \u003cli\u003eHigh contrast and optimized color balance\u003c\/li\u003e\n    \u003cli\u003eEasy-to-process data for vivid colors\u003c\/li\u003e\n    \u003cli\u003eScratch-resistant, durable coating\u003c\/li\u003e\n    \u003cli\u003eSuitable for a wide range of focal ratios\u003c\/li\u003e\n    \u003cli\u003eMade from premium, polished optical glass\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eWhy Choose Astronomik Deep-Sky RGB Filters?\u003c\/h4\u003e\n\n  \u003cp\u003eDesigned with cutting-edge coating techniques, these filters are optimized for modern CCD cameras and deliver minimal reflections or halos, even with bright stars in the field of view. Whether you're imaging nebulae or galaxies, these filters will reveal the faintest structures with enhanced contrast and detail.\u003c\/p\u003e\n\n  \u003ch4\u003eCompatibility Across Sensors\u003c\/h4\u003e\n\n  \u003cp\u003eThe Deep-Sky RGB filterset is compatible with a wide range of CCD and CMOS sensors, including Sony chips and KAF\/KAI sensors. The filters enable 1:1:1 ratio RGB exposures with minimal tweaks needed during post-processing, ensuring color balance and precision in every shot.\u003c\/p\u003e\n\n  \u003ch4\u003ePerformance in Light-Polluted Areas\u003c\/h4\u003e\n\n  \u003cp\u003eIf you’re observing under light-polluted skies, consider using Astronomik’s CLS-CCD filter as a replacement for the Luminance filter. This can significantly enhance the quality of your data by blocking artificial light, allowing deeper images even from urban areas.\u003c\/p\u003e\n\n  \u003ch4\u003eTechnical Specifications:\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e95% transmission at key wavelengths for deep-sky imaging\u003c\/li\u003e\n    \u003cli\u003eScratch-resistant coating and durable build\u003c\/li\u003e\n    \u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n    \u003cli\u003eHigh optical performance without reducing image quality\u003c\/li\u003e\n    \u003cli\u003eCompatible with both CCD and DSLR cameras\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003eThe Astronomik Deep-Sky RGB Filterset 2\" (M48) is your go-to solution for achieving professional-grade images with vivid colors and maximum contrast. Its advanced design ensures minimal reflections, allowing you to capture breathtaking details of the night sky.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42046851645617,"sku":"8H00PN","price":520.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-deep-sky-rgb-filterset-2-m48-3-filters-312517.jpg?v=1718364250"},{"product_id":"astronomik-deep-sky-rgb-filterset-31mm-3-filters","title":"Astronomik Deep-Sky RGB Filterset 31mm, 3 filters","description":"\u003ch1\u003e\u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 31mm – High Contrast Imaging Filters\u003c\/strong\u003e\u003c\/h1\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 31mm\u003c\/strong\u003e is an essential tool for astrophotographers seeking top-tier color accuracy and high contrast in deep-sky imaging. Developed through extensive research, these filters offer maximum imaging performance, especially when paired with CCD and CMOS cameras.\u003c\/p\u003e\n\n\u003cp\u003eDesigned to fit popular filter wheels, this set provides flawless results by preventing halos and reflections, even when capturing bright stars. 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These filters excel at bringing out the finest structures in deep-sky objects, even in light-polluted environments. The filters' refined transmission curves minimize unwanted light and optimize emission lines for more detailed imaging.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eEngineered for Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 31mm\u003c\/strong\u003e is compatible with filter wheels from major brands like ZWO, QHY, Atik, and more. This set is designed to work seamlessly with a variety of sensors, including KAF, KAI, and Sony chips, allowing for balanced 1:1:1 RGB exposures with minimal post-processing.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBuilt to Last\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 31mm\u003c\/strong\u003e is constructed with optically polished glass and durable, scratch-resistant coatings. These filters are made to withstand regular use, maintaining performance over time while delivering high-quality images.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eIdeal for Light-Polluted Skies\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFor observers in light-polluted areas, Astronomik recommends using the CLS-CCD filter in place of a standard Luminance filter. This simple adjustment allows you to block unwanted artificial light and capture deeper, clearer images. Many users report significantly improved image quality after making this change.\u003c\/p\u003e\n\n\u003cp\u003eElevate your astrophotography with the \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 31mm\u003c\/strong\u003e and experience the sharpness, contrast, and color fidelity these premium filters deliver.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42046875664561,"sku":"8H00PY","price":310.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-deep-sky-rgb-filterset-31mm-3-filters-385378.jpg?v=1718364441"},{"product_id":"astronomik-deep-sky-rgb-filterset-36mm-3-filters","title":"Astronomik Deep-Sky RGB Filterset 36mm, 3 filters","description":"\u003ch1\u003eAstronomik Deep-Sky RGB Filter Set 36mm, 3 filters\u003c\/h1\u003e\n\u003cp\u003eOur 36mm filters fit perfectly in all 36mm filter wheels from brands such as ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian, and Atik. Designed with a protective ring and blackened filter edges to prevent stray light, they are mechanically protected and easy to handle.\u003c\/p\u003e\n\u003cp\u003eThe orientation of the filter in the filter wheel does not affect the optical performance, making it easy to set up and use.\u003c\/p\u003e\n\u003ch2\u003eAstronomik Deep-Sky RGB Filters\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAstronomik has introduced a new range of RGB filters designed for maximum deep sky imaging performance with CCD cameras. These filters enhance your imaging experience, delivering high-quality data for sharp, high-contrast, and vivid images.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features of Astronomik Deep-Sky RGB Filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum transmission of up to 95%\u003c\/li\u003e\n\u003cli\u003eUltra-sharp, pinpoint star images\u003c\/li\u003e\n\u003cli\u003eHigh contrast for clearer images\u003c\/li\u003e\n\u003cli\u003eEasy-to-process data for vibrant colours in final images\u003c\/li\u003e\n\u003cli\u003eOptimised spectral windows for maximum photon capture on the sensor\u003c\/li\u003e\n\u003cli\u003eCrafted with finely polished, high-quality optical glass\u003c\/li\u003e\n\u003cli\u003eExtremely durable, scratch-resistant coating\u003c\/li\u003e\n\u003cli\u003eMFR Coating technique for a wide range of focal ratios\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Result of Expert Research\u003c\/h3\u003e\n\u003cp\u003eThe new Astronomik Deep-Sky RGB filters are the culmination of extensive research and development. These filters are designed to provide vivid colours and excellent contrast, making deep sky imaging easier and more rewarding.\u003c\/p\u003e\n\u003cp\u003eThese RGB filters are optimised for modern CCD camera sensors, allowing you to achieve stunning results with minimal post-processing. The transmission curves of the filters are engineered to eliminate halos and reflections, ensuring even bright stars appear sharp and clear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdded Value for Light Polluted Areas:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf you observe in areas with light pollution, consider using the CLS-CCD filter as a replacement for the Luminance filter. This can help block unwanted artificial light while delivering balanced energy across the colour channels, enabling you to capture deeper and more detailed images.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42046878023857,"sku":"8H00QJ","price":355.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-deep-sky-rgb-filterset-36mm-3-filters-946629.jpg?v=1718364256"},{"product_id":"astronomik-deep-sky-rgb-filterset-50mm-high-contrast-imaging-filters","title":"Astronomik Deep-Sky RGB Filterset 50mm – High Contrast Imaging Filters","description":"\u003ch1\u003e\u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 50mm – High Contrast Imaging Filters\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 50mm\u003c\/strong\u003e is engineered for astrophotographers who demand precise color and high contrast when imaging deep-sky objects. These filters offer superior color separation and transmission, ensuring your photos display vivid, accurate colors while minimizing the effects of light pollution.\u003c\/p\u003e\n\n\u003cp\u003eThis 50mm filter set is compatible with all popular filter wheels, including brands like ZWO, QHY, Atik, and others. The filters feature blackened edges and protective rings that prevent stray light and mechanical damage, ensuring durability and performance.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 50mm – Key Features:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh transmission rates up to 95%, delivering maximum color accuracy\u003c\/li\u003e\n\u003cli\u003ePinpoint star images with ultra-sharp focus\u003c\/li\u003e\n\u003cli\u003eDesigned for superior contrast, perfect for imaging nebulae and galaxies\u003c\/li\u003e\n\u003cli\u003eHalo-free and anti-reflection coating for clearer images, even with bright stars\u003c\/li\u003e\n\u003cli\u003eScratch-resistant coatings built for durability\u003c\/li\u003e\n\u003cli\u003eOptimized spectral windows for high photon transmission\u003c\/li\u003e\n\u003cli\u003eParfocal with the rest of the Astronomik filter range\u003c\/li\u003e\n\u003cli\u003eSuitable for a variety of sensors, including KAF, KAI, and Sony CMOS\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eOptimized for Astrophotography\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eWith the \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 50mm\u003c\/strong\u003e, you'll achieve vivid colors and sharp detail in your deep-sky images. These filters are carefully tuned for emission lines, providing excellent contrast and minimizing unwanted light pollution. The filters' performance ensures that even faint structures in nebulae and galaxies are visible in your final images.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWide Compatibility with Camera Systems\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eDesigned to work with a broad range of filter wheels and cameras, including popular models from QHY, ZWO, and Starlight Xpress, this filter set delivers balanced RGB data without the need for excessive post-processing. The result? Stunning images right out of your setup.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBuilt for Durability\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eConstructed with high-quality optical glass, these filters are coated with durable, scratch-resistant materials. They are built to last, even with frequent use under tough conditions, maintaining their performance over time for all your astrophotography needs.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eIdeal for Light-Polluted Skies\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFor those imaging from urban or light-polluted areas, pairing the Astronomik RGB Filterset with the Astronomik CLS-CCD filter can dramatically enhance contrast by blocking artificial light. This allows astrophotographers to capture deeper, clearer images even in challenging environments.\u003c\/p\u003e\n\n\u003cp\u003eEnhance your astrophotography with the \u003cstrong\u003eAstronomik Deep-Sky RGB Filterset 50mm – High Contrast Imaging Filters\u003c\/strong\u003e, and capture the night sky in unparalleled detail and color.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42046885036209,"sku":null,"price":545.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-deep-sky-rgb-filterset-50mm-3-filters-613757.jpg?v=1718364235"},{"product_id":"astronomik-deep-sky-rgb-filterset-50mm-premium-imaging-filters","title":"Astronomik Deep-Sky RGB Filterset 50mm – Premium Imaging Filters","description":"\u003ch1\u003eAstronomik Deep-Sky RGB Filterset 50 x 50mm², unmounted, 3 filters\u003c\/h1\u003e\n\n\u003cp\u003e\u003cstrong\u003eAstronomik has added a new range of RGB filters to its line of world-class products. The new Deep-Sky RGB filters are designed for maximum deep-sky imaging performance with CCD cameras.\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eUsing Astronomik Deep-Sky RGB filters will benefit your imaging and provide you with the highest-quality data for amazing images with unsurpassed sharpness, contrast, and vivid colors\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eAstronomik Deep-Sky RGB Key features:\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eMaximum transmission of up to 95%\u003c\/li\u003e\n    \u003cli\u003eUltra-sharp, pinpoint star images\u003c\/li\u003e\n    \u003cli\u003eHigh contrast\u003c\/li\u003e\n    \u003cli\u003eEasy-to-process data for vivid colors in the final image\u003c\/li\u003e\n    \u003cli\u003eOptimized spectral windows for maximum photon counts on the sensor\u003c\/li\u003e\n    \u003cli\u003eMade from the finest, optically polished glass\u003c\/li\u003e\n    \u003cli\u003eExtremely durable, scratch-resistant coating\u003c\/li\u003e\n    \u003cli\u003eMFR coating technique for a wide range of focal ratios\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe new Astronomik Deep-Sky RGB filters\u003c\/strong\u003e are the result of long and detailed research and development. These are the most advanced set of RGB filters for deep-sky imaging available today.\u003c\/p\u003e\n\n\u003cp\u003eDuring the design of the Deep-Sky RGB filters, we closely examined the sensitivity curves of today’s popular CCD cameras. We created one set of filters for all sensors, ranging from KAF- and KAI-sensors to the chips made by Sony. This allows you to take 1:1:1 ratio RGB exposures with minimal tweaking during processing for perfect colors in your image.\u003c\/p\u003e\n\n\u003cp\u003eThe transmission curves and coatings on the new Deep-Sky RGB filters are engineered to eliminate halos and reflections, even with bright stars in the field of view, allowing you to capture faint nebulae and galaxies with incredible detail.\u003c\/p\u003e\n\n\u003cp\u003eLike all Astronomik filters, the new Deep-Sky RGB filters are made using an extremely durable and scratch-resistant coating, deposited on finely polished optical substrate that is free of any striae or internal strains. All substrates are made to exactly the same thickness, so all of our filters are parfocal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eAdditional note for observers working under light-polluted skies:\u003c\/span\u003e\u003cbr\u003e\nIf your observing site suffers from light pollution, you should try using our CLS-CCD as a replacement for the Luminance filter. The transmission curve of the CLS-CCD will give you approximately the same amount of energy in all three color channels while blocking nearly all unwanted artificial light pollution. Customers who replaced the Lx filter with the CLS-CCD are amazed by the increased quality of their data. This small change allows for much deeper imaging from light-polluted locations.\u003c\/p\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42046887362737,"sku":"8H00RF","price":625.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-deep-sky-rgb-filterset-50-x-50mm2-unmounted-3-filters-595953.jpg?v=1718364251"},{"product_id":"astronomik-uhc-filter-ultra-high-contrast-for-deep-sky-observing","title":"Astronomik UHC Filter – Ultra High Contrast for Deep-Sky Observing","description":"\u003cp\u003e\u003cstrong\u003eThe Astronomik UHC is THE filter for visual observing.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eYou will enjoy using your Astronomik UHC filter because you will see more stars and more details in deep-sky objects compared to filters from other manufacturers.\u003c\/p\u003e\n\n\u003cp\u003eThe Astronomik UHC (Ultra High Contrast) filter allows the transmission of nearly 100% of the radiation from both O-III and H-beta lines. Though the second window for the H-alpha line is not intended for visual observing, it is important when used with electronic devices. All annoying, scattered light from other wavelengths, including local artificial light pollution, is filtered out effectively. With this strong blocking of the sky background, an unexpected wealth of detail becomes visible in gas nebulae and planetary nebulae.\u003c\/p\u003e\n\n\u003ch4\u003eMain use\u003c\/h4\u003e\n\n\u003cp\u003eAstronomik UHC filters’ astounding high light transmission brings better views of deep-sky objects even to small telescopes! The high transmission of our optical glass filters means that enough light is available to allow successful visual observations with telescopes starting at 50mm aperture. Our Astronomik filters are optimized for use with telescope focal ratios from f\/4 to f\/15. Transmission losses and chromatic distortions that occur with other filters only appear with Astronomik filters when extremely bright aperture ratios of 1:2 or more come into play. Another major advantage of the Astronomik UHC filter is the high optical quality of the filter glass. When using Astronomik UHC filters, you will quickly notice the same needle-sharp stars you are familiar with from your astronomical instrument without any filter!\u003c\/p\u003e\n\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\n\u003cul\u003e\n    \u003cli\u003eVisual observation (dark skies): Very good for telescopes of all apertures and high exit pupils\u003c\/li\u003e\n    \u003cli\u003eVisual observation (urban skies): Very good for telescopes with a 100 mm aperture or larger\u003c\/li\u003e\n    \u003cli\u003eFilm photography: Reasonable, but requires very long exposure times\u003c\/li\u003e\n    \u003cli\u003eCCD photography: Good when used with an additional IR-block filter\u003c\/li\u003e\n    \u003cli\u003eDSLR photography (original): Good, with color balance shifted but contrast enhanced\u003c\/li\u003e\n    \u003cli\u003eDSLR photography (astro modified): Very good, with near-perfect color balance\u003c\/li\u003e\n    \u003cli\u003eDSLR photography (MC modified): Good when used with an additional IR-block filter\u003c\/li\u003e\n    \u003cli\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n    \u003cli\u003eWebcam \/ Video (Deep Sky): Good, especially if light pollution is a significant problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\n\u003cul\u003e\n    \u003cli\u003eTypical 95% transmission at 486nm (H-beta)\u003c\/li\u003e\n    \u003cli\u003eTypical 95% transmission at 496nm (O-III)\u003c\/li\u003e\n    \u003cli\u003eTypical 95% transmission at 501nm (O-III)\u003c\/li\u003e\n    \u003cli\u003eTypical 95% transmission at 656nm (H-alpha)\u003c\/li\u003e\n    \u003cli\u003eOptimum position of transmission for telescopes with focal ratios from f\/10 to f\/3.5\u003c\/li\u003e\n    \u003cli\u003eEntire blocking of annoying wavelengths\u003c\/li\u003e\n    \u003cli\u003eIdeal all-around deep sky filter even for small telescopes\u003c\/li\u003e\n    \u003cli\u003eNot sensitive to humidity or aging\u003c\/li\u003e\n    \u003cli\u003eScratch-resistant!\u003c\/li\u003e\n    \u003cli\u003eExcellent carrier material – the optical performance of your telescope is not reduced by the filter in any way\u003c\/li\u003e\n    \u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n    \u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n    \u003cli\u003eCompletely resistant to high humidity, scratches, and aging effects\u003c\/li\u003e\n    \u003cli\u003eDiffraction limited – the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n    \u003cli\u003eAstronomik filters are delivered in a high-quality, long-lasting filter box\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055339638961,"sku":"8H0011","price":89.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-125-m285-filter-609186.jpg?v=1718364467"},{"product_id":"astronomik-uhc-2-m48-filter-high-contrast-for-deep-sky-observations","title":"Astronomik UHC 2\" M48 Filter – High Contrast for Deep Sky Observations","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch1\u003eAstronomik UHC 2\" M48 Filter – Enhance Deep Sky and Planetary Views\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eThe Astronomik UHC filter is perfect for improving your visual astronomy experience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlock more stars and hidden details in deep-sky objects with the Astronomik UHC (Ultra High Contrast) filter. It allows nearly 100% transmission of light from O-III and H-beta wavelengths while blocking out unwanted light pollution and scattered light. This makes gas and planetary nebulae more visible and detailed.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cp\u003eThe Astronomik UHC filter enhances deep-sky views, making it ideal even for small telescopes. Its high transmission rate ensures successful observations with telescopes starting at 2\" (50mm) apertures. Optimized for focal ratios between f\/4 and f\/15, the filter provides sharp, distortion-free images.\u003c\/p\u003e\n\u003ch4\u003eBest Uses\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (under dark skies): Great for all telescope sizes, ensuring excellent clarity.\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban areas): Best suited for telescopes with a 100mm or larger aperture.\u003c\/li\u003e\n\u003cli\u003eCCD photography: Works well when paired with an additional IR-block filter.\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro-modified): Provides near-perfect color balance for deep-sky images.\u003c\/li\u003e\n\u003cli\u003eWebcam\/Video (Deep Sky): Helps reduce light pollution interference in video observations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Details\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e95% transmission at 486nm (H-beta)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 496nm and 501nm (O-III)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 656nm (H-alpha)\u003c\/li\u003e\n\u003cli\u003eOptimized for telescopes with focal ratios from f\/10 to f\/3.5\u003c\/li\u003e\n\u003cli\u003eBlocks unwanted wavelengths of light\u003c\/li\u003e\n\u003cli\u003ePerfect for use with small telescopes\u003c\/li\u003e\n\u003cli\u003eDurable, scratch-resistant, and resistant to moisture and aging\u003c\/li\u003e\n\u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eComes in a high-quality, protective filter box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Astronomik UHC filter is ideal for both beginner and experienced astronomers seeking to improve their deep-sky observations. With excellent transmission and premium build quality, it ensures crystal-clear views and is a versatile addition to your telescope setup.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055339770033,"sku":"8H0012","price":179.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-2-m48-filter-802175.jpg?v=1718364253"},{"product_id":"astronomik-uhc-clip-filter-eos-aps-c-maximize-deep-sky-observing","title":"Astronomik UHC Clip-Filter EOS APS-C – Maximize Deep Sky Observing","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch1\u003eAstronomik UHC Clip-Filter EOS APS-C – Maximize Deep Sky Observing\u003c\/h1\u003e\n\n  \u003cp\u003e\u003cstrong\u003eThe Astronomik UHC is the go-to filter for visual observing and astrophotography.\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003cp\u003eUsing the Astronomik UHC filter allows you to see more stars and details in deep-sky objects compared to other filters. It provides nearly 100% transmission of O-III and H-beta radiation, making it perfect for deep-sky observations, while efficiently blocking artificial light pollution.\u003c\/p\u003e\n\n  \u003ch4\u003eMain Use\u003c\/h4\u003e\n\n  \u003cp\u003eThe Astronomik UHC filter offers high light transmission for enhanced views of deep-sky objects, even with small telescopes. It is optimized for telescopes with focal ratios between f\/4 and f\/15. The optical quality of the glass ensures sharp, distortion-free star images, even with high-performance instruments.\u003c\/p\u003e\n\n  \u003ch4\u003eSuitability\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eVisual observation (dark skies): Excellent, for all telescope apertures\u003c\/li\u003e\n    \u003cli\u003eVisual observation (urban skies): Very good, for telescopes with 100mm aperture or larger\u003c\/li\u003e\n    \u003cli\u003eCCD photography: Excellent with an additional IR-block filter\u003c\/li\u003e\n    \u003cli\u003eDSLR photography (astro-modified): Very good color balance and contrast\u003c\/li\u003e\n    \u003cli\u003eWebcam \/ Video (Deep Sky): Effective in light-polluted areas\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e95% transmission at 486nm (H-beta)\u003c\/li\u003e\n    \u003cli\u003e95% transmission at 496nm and 501nm (O-III)\u003c\/li\u003e\n    \u003cli\u003e95% transmission at 656nm (H-alpha)\u003c\/li\u003e\n    \u003cli\u003eOptimized for focal ratios from f\/3.5 to f\/10\u003c\/li\u003e\n    \u003cli\u003eScratch-resistant and resistant to humidity and aging\u003c\/li\u003e\n    \u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n    \u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003eThe \u003cstrong\u003eAstronomik UHC Clip-Filter EOS APS-C\u003c\/strong\u003e is designed for astrophotographers and observers looking to enhance their deep-sky experience. Its ability to block unwanted light while allowing maximum transmission makes it a must-have for capturing nebulae and galaxies in stunning detail.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055349895345,"sku":"8H00IE","price":143.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-clip-filter-eos-aps-c-842826.jpg?v=1718364461"},{"product_id":"astronomik-uhc-clip-filter-for-sony-alpha-7-high-contrast-viewing","title":"Astronomik UHC Clip-Filter for Sony Alpha 7 – High Contrast Viewing","description":"\u003ch1\u003eAstronomik UHC Clip-Filter Sony alpha 7\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eThe Astronomik UHC is the ideal filter for visual observing.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith the Astronomik UHC filter, you will enjoy more stars and finer details in deep-sky objects compared to filters from other manufacturers. The UHC (Ultra High Contrast) filter allows nearly 100% transmission of light from the O-III and H-beta lines. Though the H-alpha window is primarily for electronic devices, it still blocks scattered light and local artificial light pollution effectively, revealing rich detail in gas nebulae and planetary nebulae by darkening the sky background.\u003c\/p\u003e\n\u003ch4\u003eMain Use\u003c\/h4\u003e\n\u003cp\u003eThe Astronomik UHC filter provides excellent views of deep-sky objects, even with smaller telescopes. It offers high transmission for visual observations starting at 2\" (50mm) aperture and is optimized for telescope focal ratios between f\/4 and f\/15. Chromatic distortions and transmission losses typically seen in other filters are minimized, ensuring that you enjoy sharp, clear stars without reducing your telescope's optical performance.\u003c\/p\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Suitable for all telescope apertures\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Best for telescopes from 100mm aperture\u003c\/li\u003e\n\u003cli\u003eCCD photography: Suitable with an additional IR-block filter\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Excellent with near-perfect color balance\u003c\/li\u003e\n\u003cli\u003eWebcam\/Video (Deep Sky): Good for handling light pollution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e95% transmission at 486nm (H-beta)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 496nm and 501nm (O-III)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 656nm (H-alpha)\u003c\/li\u003e\n\u003cli\u003eIdeal for telescopes with focal ratios from f\/10 to f\/3.5\u003c\/li\u003e\n\u003cli\u003eComplete blocking of unwanted wavelengths\u003c\/li\u003e\n\u003cli\u003eScratch-resistant and humidity-resistant\u003c\/li\u003e\n\u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eDelivered in a high-quality, long-lasting filter box\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055357038769,"sku":"8H00XC","price":214.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-clip-filter-sony-alpha-7-835950.jpg?v=1718364466"},{"product_id":"astronomik-uhc-clip-filter-eos-xl-enhanced-deep-sky-observation-filter","title":"Astronomik UHC Clip-Filter EOS XL – Enhanced Deep-Sky Observation Filter","description":"\u003ch1\u003eAstronomik UHC Clip-Filter EOS XL – Ultra High Contrast for Deep-Sky Observation\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eThe Astronomik UHC Clip-Filter offers exceptional contrast for deep-sky observation, providing more stars and details compared to other filters.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Astronomik UHC (Ultra High Contrast) filter allows near 100% transmission of O-III and H-beta lines, while blocking unwanted light pollution, making gas nebulae and planetary nebulae appear in stunning detail. While not intended for visual use of the H-alpha line, it’s highly effective for electronic devices.\u003c\/p\u003e\n\u003ch4\u003eMain Use\u003c\/h4\u003e\n\u003cp\u003eThe Astronomik UHC filter enhances deep-sky viewing, even for smaller telescopes starting at 2\" (50mm) aperture. Its high transmission levels make it suitable for telescope focal lengths from f\/4 to f\/15, with no chromatic distortion or transmission loss at extremely fast focal ratios. Thanks to the high optical quality of the filter glass, you’ll notice needle-sharp stars, just like using your telescope without a filter.\u003c\/p\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Excellent for telescopes of all apertures\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Very good for telescopes from 100mm aperture\u003c\/li\u003e\n\u003cli\u003eFilm photography: Good, but requires long exposure times\u003c\/li\u003e\n\u003cli\u003eCCD photography: Effective with an additional IR-block filter\u003c\/li\u003e\n\u003cli\u003eDSLR photography (original): Good with enhanced contrast but color balance shifted\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Excellent with near-perfect color balance\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Deep Sky): Good for combating light pollution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e95% transmission at 486nm (H-beta)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 496nm and 501nm (OIII)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 656nm (H-alpha)\u003c\/li\u003e\n\u003cli\u003eOptimized for telescopes with focal ratios from f\/10 to f\/3.5\u003c\/li\u003e\n\u003cli\u003eComprehensive blocking of unwanted wavelengths\u003c\/li\u003e\n\u003cli\u003eIdeal all-round deep sky filter, even for small telescopes\u003c\/li\u003e\n\u003cli\u003eHighly resistant to humidity, scratches, and aging\u003c\/li\u003e\n\u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eDelivered in a durable, high-quality filter box\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055366377649,"sku":"8H00LS","price":197.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-clip-filter-eos-xl-331516.jpg?v=1718364260"},{"product_id":"astronomik-uhc-50mm-filter-enhance-deep-sky-observations","title":"Astronomik UHC 50mm Filter – Enhance Deep Sky Observations","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch1\u003eAstronomik UHC 50mm Filter – Enhanced Deep Sky Observing\u003c\/h1\u003e\n\n  \u003cp\u003eOur 50mm filters are compatible with all 50mm filter wheels from popular brands like ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian, and Atik. The protective ring design and blackened filter edges prevent stray light, keeping the filters safe and easy to handle.\u003c\/p\u003e\n\n  \u003cp\u003eThe filter's orientation in the filter wheel does not affect optical performance.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eThe Astronomik UHC is the ideal filter for visual observing.\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003cp\u003eWith the Astronomik UHC (Ultra High Contrast) filter, you will observe more stars and more details in deep-sky objects compared to other filters. This filter allows nearly 100% transmission of radiation from O-III and H-beta lines. It also blocks scattered light from artificial light pollution sources, allowing gas and planetary nebulae to appear in greater detail.\u003c\/p\u003e\n\n  \u003ch4\u003eMain Use\u003c\/h4\u003e\n\n  \u003cp\u003eThe high transmission of the Astronomik UHC filter improves views of deep-sky objects, even with small telescopes. The optical glass provides sharp, distortion-free images, and the filter is optimized for telescopes with focal lengths from f\/4 to f\/15. Even at faster f-ratios, it offers minimal transmission loss and chromatic distortion. You’ll see needle-sharp stars, just as you would with no filter in place!\u003c\/p\u003e\n\n  \u003ch4\u003eSuitability\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eVisual observation (dark skies): Excellent for telescopes of all apertures\u003c\/li\u003e\n    \u003cli\u003eVisual observation (urban skies): Ideal for telescopes 100mm and larger\u003c\/li\u003e\n    \u003cli\u003eFilm photography: Suitable, but with long exposure times\u003c\/li\u003e\n    \u003cli\u003eCCD photography: Best used with an additional IR-block filter\u003c\/li\u003e\n    \u003cli\u003eDSLR photography (original): Good, though color balance shifts slightly\u003c\/li\u003e\n    \u003cli\u003eDSLR photography (astro-modified): Excellent, with near-perfect color balance\u003c\/li\u003e\n    \u003cli\u003eWebcam\/Video (Deep Sky): Works well if light pollution is an issue\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e95% transmission at 486nm (H-beta)\u003c\/li\u003e\n    \u003cli\u003e95% transmission at 496nm (O-III)\u003c\/li\u003e\n    \u003cli\u003e95% transmission at 501nm (O-III)\u003c\/li\u003e\n    \u003cli\u003e95% transmission at 656nm (H-alpha)\u003c\/li\u003e\n    \u003cli\u003eOptimized for telescopes with focal ratios from f\/10 to f\/3.5\u003c\/li\u003e\n    \u003cli\u003eComplete blocking of unwanted wavelengths\u003c\/li\u003e\n    \u003cli\u003eIdeal all-round deep-sky filter for small telescopes\u003c\/li\u003e\n    \u003cli\u003eScratch-resistant, humidity-resistant, and long-lasting design\u003c\/li\u003e\n    \u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n    \u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n    \u003cli\u003eDiffraction-limited: the filter won’t reduce the optical performance of your telescope\u003c\/li\u003e\n    \u003cli\u003eIncludes a durable, high-quality storage box\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055371030705,"sku":"8H00A0","price":188.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-50mm-537832.jpg?v=1718364240"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/collections\/Astronomik_logo.jpg?v=1771941782","url":"https:\/\/www.darkclearskies.co.uk\/collections\/astronomik.oembed?page=3","provider":"Dark Clear Skies ","version":"1.0","type":"link"}