{"title":"Antlia Dual \u0026 Multi-Band Filters","description":"\u003cp\u003eExplore Antlia dual \u0026amp; multi-band filters at Dark Clear Skies.\u003c\/p\u003e","products":[{"product_id":"antlia-alp-t-dual-band-5nm-filter-2-mounted-for-deep-sky-imaging","title":"Antlia ALP-T Dual Band 5nm Filter - 2\" Mounted for Deep-Sky Imaging","description":"\u003ch1\u003eAntlia ALP-T Dual Band 5nm Filter – High Performance for Astrophotography\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia ALP-T Dual Band 5nm Filter\u003c\/strong\u003e is a dual line-pass filter designed for use with one-shot colour (OSC) cameras, including DSLR and astronomical cameras. It can also be used as a narrowband filter with monochrome cameras, providing enhanced signal-to-noise ratio and reducing imaging time.\u003c\/p\u003e\n\u003ch2\u003eCapture Ha and OIII Nebulae Simultaneously\u003c\/h2\u003e\n\u003cp\u003eThis filter isolates the red \u003cstrong\u003eHydrogen-alpha (Ha)\u003c\/strong\u003e and blue-green \u003cstrong\u003eOxygen III (OIII)\u003c\/strong\u003e emission lines, while effectively suppressing light pollution, moonlight, and airglow. With \u003cstrong\u003eoptical density (OD)4.5\u003c\/strong\u003e suppression, it ensures superior image contrast and cleaner data capture, perfect for astrophotography in light-polluted areas.\u003c\/p\u003e\n\u003ch2\u003eAdvanced Coating for Superior Image Quality\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eIon Gun Assisted Deposition\u003c\/strong\u003e coating on a double-sided polished substrate ensures minimal internal reflections and flat-top bandpass performance. This helps you achieve sharper images with a clear distinction between nebulae and background light pollution, reducing post-processing effort.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha (Ha):\u003c\/strong\u003e FWHM 5nm, CWL 656.3nm, Peak Transmission 90%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOxygen III (OIII):\u003c\/strong\u003e FWHM 5nm, CWL 500.7nm, Peak Transmission 82%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocking:\u003c\/strong\u003e ≥OD4.5 from 300nm to 1100nm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Thickness:\u003c\/strong\u003e 2mm +\/- 0.05mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFilter Ring Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 2'' (M48*0.75)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-thin filter cell:\u003c\/strong\u003e Minimizes vignetting with maximum possible clear aperture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black anodized finish with laser engraving for long-lasting clarity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for OSC cameras (DSLR, CMOS, CCD) and monochrome cameras\u003c\/li\u003e\n\u003cli\u003eSuppression of artificial lighting from Bortle scale 1 to 8\u003c\/li\u003e\n\u003cli\u003eMinimizes spectrum downshifts, maximizing imaging performance\u003c\/li\u003e\n\u003cli\u003eBlocks near-IR (NIR) up to 1100nm for enhanced image quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWith the \u003cstrong\u003eAntlia ALP-T Dual Band 5nm Filter\u003c\/strong\u003e, you can capture breathtaking nebulae images with exceptional contrast and clarity. Its superior coatings, narrow 5nm bandpass, and durable design make it an essential tool for astrophotographers battling light pollution.\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":42278552993969,"sku":"ANT-ALP-T-2","price":398.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/antlia-alp-t-dual-band-5nm-filter-2-mounted-679802.webp?v=1782294555"},{"product_id":"alp-t-2-dualband-5nm-ha-oiii-filter-high-contrast-deep-sky-imaging","title":"ALP-T 2\" Dualband 5nm Ha \u0026 OIII Filter - High Contrast Deep-Sky Imaging","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch1\u003eAntlia ALP-T Dual Band 5nm Ha \u0026amp; OIII Filters\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eAntlia ALP-T Dual Band 5nm Filters\u003c\/strong\u003e are premium dual-line pass filters designed to enhance astrophotography by isolating H-alpha and OIII emission lines. Available in both \u003cstrong\u003eStandard\u003c\/strong\u003e and \u003cstrong\u003eHighspeed\u003c\/strong\u003e versions, these filters provide unmatched performance for a range of optical systems, ensuring vibrant and contrasted nebula imaging even in light-polluted conditions.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Bandpass:\u003c\/strong\u003e Captures H-alpha (656.3nm) and OIII (500.7nm) lines simultaneously for efficient imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Version:\u003c\/strong\u003e Optimized for f-ratios slower than f\/3.6, providing exceptional performance for most optical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighspeed Version:\u003c\/strong\u003e Tailored for fast optics between f\/2.2 and f\/3.6, with a slightly shifted passband to maximize transmission and contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Suppression:\u003c\/strong\u003e Advanced coatings achieve an optical density (OD) of 4.5, minimizing interference from light pollution, moonlight, and airglow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimized Halo Effect:\u003c\/strong\u003e Steep bandpass edges reduce internal reflections, delivering cleaner images around bright stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Manufacturing:\u003c\/strong\u003e Each filter is inspected with Agilent Cary spectrophotometers for consistent, reliable results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePerformance\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eStandard Version\u003c\/strong\u003e excels with optics slower than f\/3.6, offering balanced performance across most systems. For optics faster than f\/3.6, the \u003cstrong\u003eHighspeed Version\u003c\/strong\u003e ensures enhanced contrast and nebula visibility. While filters used with optics faster than f\/2 may experience a 15–20% decrease in transmission due to wavelength shifts, they maintain exceptional imaging quality.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for use with DSLR, CMOS, and CCD colour cameras\u003c\/li\u003e\n\u003cli\u003eCompatible with one-shot colour cameras and monochrome setups\u003c\/li\u003e\n\u003cli\u003eEffective in light-polluted areas and under moonlit skies\u003c\/li\u003e\n\u003cli\u003eIdeal for capturing nebulae, supernova remnants, and other emission objects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBandpass:\u003c\/strong\u003e 5nm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Density:\u003c\/strong\u003e OD 4.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Efficiency:\u003c\/strong\u003e High transmission for H-alpha and OIII\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoatings:\u003c\/strong\u003e Multi-coated to suppress unwanted light\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose Antlia ALP-T Filters?\u003c\/h2\u003e\n\u003cp\u003eWhether you're using a standard optical system or fast optics, the Antlia ALP-T Dual Band 5nm Filters deliver exceptional results. With their high transmission, superior contrast, and reduced halo effects, these filters offer a perfect balance of performance and value for astrophotographers seeking precision and reliability.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antlia","offers":[{"title":"ALP-T 2\" Dualband 5nm Ha\u0026OIII filter","offer_id":43509575090353,"sku":"ANT-ALP-T-2-Ha-OIII","price":398.0,"currency_code":"GBP","in_stock":true},{"title":"ALP-T  2\" Dualband 5nm Ha\u0026OIII  Highspeed","offer_id":43509575123121,"sku":"ANT-ALP-T-2-HIGHSPEED","price":398.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/alp-t-dualband-5nm-ha-amp-oiii-filter-627198.webp?v=1782294527"},{"product_id":"alp-t-dual-band-5nm-b4836-ha-oiii-filter-astrophotography-filter-1","title":"ALP-T Dual Band 5nm \u0026 B4836 Ha \u0026 OIII Filter - Astrophotography Filter","description":"\u003cdiv class=\"product-info has-extra-button\"\u003e\n\u003cdiv class=\"product-left\"\u003e\n\u003cdiv class=\"product-image direction-vertical position-left additional-images-loaded\"\u003e\n\u003cdiv data-options='{\"speed\":500,\"autoplay\":false,\"pauseOnHover\":true,\"loop\":false}' class=\"swiper main-image swiper-has-pages\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch1\u003eALP-T Dual band 5nm\u0026amp;B4836 Ha\u0026amp;OIII filter 36mm\u003c\/h1\u003e\n\u003ch4\u003eThe Antlia ALP-T dual band 5nm filter is a dual line-pass filter which was designed to be used primarily with one-shot colour (OSC) cameras such as DSLR's or astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time.\u003c\/h4\u003e\n\u003ch4\u003e The advanced multi-coatings on the ALP-T ultra dual band filter effectively isolates the red Ha and the blue-green OIII lines light from emission nebulae, with almost total suppression of optical density (OD) 4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that our ALP-T dual band 5nm filter creates a superior signal-to-noise ratio and better contrast in your images. The filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post processing efforts to isolate faint details from the background light pollution.\u003c\/h4\u003e\n\u003ch3\u003eApplication and Performance:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras\u003c\/li\u003e\n\u003cli\u003eSuppression of optical density (OD)4.5 on unwanted visual wavelengths offers very good signal-to-noise ratio\u003c\/li\u003e\n\u003cli\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/li\u003e\n\u003cli\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/li\u003e\n\u003cli\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/li\u003e\n\u003cli\u003eGood performance at focal ratios faster than F3.0 with contrast increasing as focal ratio increases\u003c\/li\u003e\n\u003cli\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/li\u003e\n\u003cli\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTechnical Data:\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"table table-bordered\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eHydrogen Alpha\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOxigen III\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e656.3nm\u003c\/td\u003e\n\u003ctd\u003e500.7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd\u003e90%\u003c\/td\u003e\n\u003ctd\u003e82%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking\u003c\/td\u003e\n\u003ctd\u003e≥OD4.5 @ 300-1100nm\u003c\/td\u003e\n\u003ctd\u003e≥OD4.5 @ 300-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eAvailable Sizes：\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnmounted：Dia 36mm (2mm thickness)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot Recommended:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSolar Observing and imaging\u003c\/li\u003e\n\u003cli\u003eVisual observation\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eIMPORTANT!\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003cbr\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUSER CONTRIBUTION:\u003c\/p\u003e\n\u003cp\u003eYou will see the same images on the manufacturer's website. The difference is that we decided to slightly improve the images in Photoshop, however whilst these images below had been improved, on the other hand we also had to reduce the resolution due to the image size limitations on our website.\u003c\/p\u003e\n\u003cp\u003e\u003cimg width=\"1600\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Antlia-ALP-T-gold-filter-Rosette-NGC2244-FINAL.webp\" height=\"1069\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg width=\"1600\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Antlia-ALP-T-gold-filter-IC434-Final-1600px.webp\" height=\"1055\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg width=\"1600\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Antlia-ALP-T-gold-filter-IC63_LIGHT.webp\" height=\"1020\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg width=\"1600\" src=\"https:\/\/www.365astronomy.com\/image\/catalog\/product\/ANTLIA\/Antlia-ALP-T-gold-NGC%206960_Western%20Veil%20nebula.jpg\" height=\"1069\"\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"ALP-T Dual band 5nm\u0026B4836  Ha\u0026OIII filter 36mm","offer_id":43509590589617,"sku":null,"price":312.0,"currency_code":"GBP","in_stock":true},{"title":"ALP-T Dual band 5nm\u0026B4836  Ha\u0026OIII Highspeed 36mm","offer_id":43509590622385,"sku":null,"price":312.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/alp-t-dual-band-5nmb4836-haoiii-filter-919885.webp?v=1782294523"},{"product_id":"antlia-alp-t-gold-dual-band-5nm-filter-36mm-for-astrophotography","title":"ANTLIA ALP-T \"Gold\" Dual Band 5nm Filter - 36mm for Astrophotography","description":"\u003ch1 class=\"title page-title\"\u003eANTLIA ALP-T \"gold\" Dual Band 5nm Filter- 36mm - HIGH SPEED version for f\/2.2-f\/3.6 (unmounted, but with a B4836 2\" filter adapter included)\u003c\/h1\u003e\n\u003cp\u003eThe ALP-T Dual Band 5nm Highspeed Filters are further optimized to work with high-speed imaging systems by shifting slightly the passband and centre wavelength.\u003cbr\u003eUsing these highspeed filters with optics between f\/2.2 and f\/3.6 shows much stronger and more contrasted nebulae imaging compared to the standard version.\u003cbr\u003eFor optics f-ratios slower than f\/3.6, the standard ALP-T Dual Band 5nm filter would be a better fit.\u003cbr\u003eMeanwhile, if you seek the best possible performance with any optics faster than f\/2.2, the highspeed version would still be the best choice, however keep in mind that the blue shift data by the computer simulation indicates narrowband filter shifts its bandwidth to shorter wavelengths with faster optics than f\/2, transmission at the emission wavelength may decrease perhaps 15%-20%.\u003cbr\u003eAlthough the Antlia ALP-T highspeed filter has similar transmission rates reduction in the H-a and OIII when the filter is used on fast optics, based on current standard version users’ data, it is evident that the filter still has high performance of increase in emission nebula contrast and minimized halo.\u003cbr\u003eThe price of the highspeed version is the same as that of the standard filters, but doubles the benefits for the high-speed optics users.\u003cbr\u003eWorth mentioning that Antlia inspected and measured their products piece by piece with an Agilent Cary’s professional spectrophotometer with a resolution\/slit width up to 0.2nm, which make us provide highly reliable and consistent products to you..\u003cbr\u003eThe Antlia ALP-T dual band 5nm series filter is a dual line-pass filter that was designed to be used primarily with one-shot color (OSC) cameras such as DSLR's and astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time.\u003cbr\u003eThe advanced multi-coatings on our ALP-T ultra dual band filter effectively isolate the red Ha and the blue-green OIII lines light from emission nebulae, with almost total suppression of optical density\u003cbr\u003e(OD)4.5 of unwanted wavelengths from light pollution, moonlight, and airglow. The result is that our ALP-T dual band 5nm filter creates a superior signal-to-noise ratio and better contrast in your images.\u003cbr\u003eThe filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. \u003cbr\u003eIt enables you to capture cleaner data and reduces the post-processing efforts to isolate faint details from the background light pollution.\u003c\/p\u003e\n\u003ch3\u003eApplication and Performance:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for fast astronomy optics between f-ratios of f\/2.2 and f\/3.6\u003c\/li\u003e\n\u003cli\u003eEngineered for use with DSLR, CMOS, and CCD color cameras\u003c\/li\u003e\n\u003cli\u003eSuppression of unwanted wavelengths (optical density of (OD) 4.5) improves signal-to-noise ratio\u003c\/li\u003e\n\u003cli\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/li\u003e\n\u003cli\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/li\u003e\n\u003cli\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/li\u003e\n\u003cli\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/li\u003e\n\u003cli\u003eNear IR (NIR) is blocked up to 1050nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTechnical Data:\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"table table-bordered\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eHydrogen Alpha\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOxigen III\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e657.8nm\u003c\/td\u003e\n\u003ctd\u003e502.2nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd\u003e88%\u003c\/td\u003e\n\u003ctd\u003e82%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking\u003c\/td\u003e\n\u003ctd\u003e≥OD4.5 @ 300-1050nm\u003c\/td\u003e\n\u003ctd\u003e≥OD4.5 @ 300-1050nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eFilter Cell (specifications for cell mounted filters only):\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2” (M48*0.75)\u003c\/li\u003e\n\u003cli\u003eUltra-thin filter cell to minimize vignetting by maximizing possible clear aperture\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eNon-Fading Laser Engraving\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAvailable Sizes：\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMounted： 2” (2mm thickness)\u003c\/li\u003e\n\u003cli\u003eUnmounted：Dia 36mm (2mm thickness)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot Recommended:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSolar Observing and imaging\u003c\/li\u003e\n\u003cli\u003eVisual observation\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eIMPORTANT!\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003cbr\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUSER CONTRIBUTION:\u003c\/p\u003e\n\u003cp\u003eYou will see the same images on the manufacturer's website. The difference is that we decided to slightly improve the images in Photoshop, however whilst these images below had been improved, on the other hand we also had to reduce the resolution due to the image size limitations on our website.\u003c\/p\u003e\n\u003cp\u003eBelow image was taken via the new HIGH SPEED version of the ALP-T filter.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Rosette-Nebula-Antlia-ALP-T-Highspeed-HS925-5x300s.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003eBelow images were taken with the normal (original) version of the Alp-T, not the high speed version. We left them here for now only for reference.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Antlia-ALP-T-gold-filter-Rosette-NGC2244-FINAL.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Antlia-ALP-T-gold-filter-IC434-Final-1600px.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/Antlia-ALP-T-gold-filter-IC63_LIGHT.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/catalog\/product\/ANTLIA\/Antlia-ALP-T-gold-NGC%206960_Western%20Veil%20nebula.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":42278615351473,"sku":null,"price":312.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/antlia-alp-t-gold-dual-band-5nm-filter-36mm-189774.webp?v=1782294559"}],"url":"https:\/\/www.darkclearskies.co.uk\/collections\/antlia-dual-multi-band-filters.oembed","provider":"Dark Clear Skies ","version":"1.0","type":"link"}