{"title":"Antlia Planetary \u0026 Observing Filters","description":"\u003cp\u003eExplore Antlia planetary \u0026amp; observing filters at Dark Clear Skies.\u003c\/p\u003e","products":[{"product_id":"antlia-h-beta-oiii-1-25-filter-for-visual-astrophotography-use","title":"Antlia H-beta \u0026 OIII 1.25\" Filter","description":"\u003ch1 class=\"title page-title\"\u003eAntlia H-beta \u0026amp; OIII 1.25\" Filter  - 1.25\"\u003c\/h1\u003e\n\n\u003cp\u003eThe Antlia H-beta \u0026amp; OIII 1.25\" Filter  is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical  wavelengths (OIII 500.7nm, OIII 495.9nm, and H-Beta 486.1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.\u003cbr\u003e\nWhen the Antlia H-beta \u0026amp; OIII 1.25\" Filter used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs.\u003c\/p\u003e\n\n\u003ch4\u003e\n\u003cb\u003eAntlia H-beta \u0026amp; OIII 1.25\" Filter  \u003c\/b\u003e\u003cstrong\u003eMAIN APPLICATION AND PERFORMANCE:\u003c\/strong\u003e\n\u003c\/h4\u003e\n\n\u003cp\u003eThe Antlia H-beta \u0026amp; OIII 1.25\" Filter was coated with almost total suppression of optical density (OD4) on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm, it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.\u003cbr\u003e\nThe HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.\u003cbr\u003e\nSince human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer's eyes.\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003eAntlia H-beta \u0026amp; OIII 1.25\" Filter Technical Specifications:\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"1\" cellspacing=\"1\"\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e\u003c\/td\u003e\n\t\t\t\u003ctd\u003eOxygen III\u003c\/td\u003e\n\t\t\t\u003ctd\u003eOxygen III\u003c\/td\u003e\n\t\t\t\u003ctd\u003eH-beta\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\t\t\t\u003ctd\u003e500.7nm\u003c\/td\u003e\n\t\t\t\u003ctd\u003e495.9nm\u003c\/td\u003e\n\t\t\t\u003ctd\u003e486.1nm\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003ePeak transmission\u003c\/td\u003e\n\t\t\t\u003ctd\u003e\u0026gt;90%\u003c\/td\u003e\n\t\t\t\u003ctd\u003e\u0026gt;90%\u003c\/td\u003e\n\t\t\t\u003ctd\u003e\u0026gt;90%\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ctable border=\"1\" cellpadding=\"1\" cellspacing=\"1\"\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eBlocking     \u003c\/td\u003e\n\t\t\t\u003ctd\u003eOD4@\u003cspan\u003e \u003c\/span\u003e300-1000nm\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\t\t\t\u003ctd\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eBasic Substrate\u003c\/td\u003e\n\t\t\t\u003ctd\u003eOptical, Single, Non-glued substrate\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eSurface Quality\u003c\/td\u003e\n\t\t\t\u003ctd\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eTransmitted Wave front                                   \u003c\/td\u003e\n\t\t\t\u003ctd\u003eLambda\/4 or better\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eParallelism\u003c\/td\u003e\n\t\t\t\u003ctd\u003eless than 30 arcsec\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSizes and MAP Prices：\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eSize Minimum Advertised Pricing (MAP)\u003cbr\u003e\nMounted: 1.25’’ US$99.00\u003cbr\u003e\nOther sizes 2’’ Availability and price are to be confirmed\u003c\/p\u003e\n\n\u003ch4\u003e\n\u003cb\u003eAntlia H-beta \u0026amp; OIII 1.25\" Filter \u003c\/b\u003e\u003cstrong\u003eFILTER RING:\u003c\/strong\u003e\n\u003c\/h4\u003e\n\n\u003cp\u003e1.25’’(M28.5*0.6)\u003cbr\u003e\nUltra-thin filter cell to minimize vignetting, Black anodized finish, Laser engraving No fading\u003c\/p\u003e\n\n\u003cp\u003eWarranty: 3-years against delamination\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003e\u003cspan style=\"color: #ff0000;\"\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/antlia-h-beta-and-oiii-visual-and-astrophotography-filter-1.25-Spectrum-Curve.webp\"\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":42278648807601,"sku":"ANT-HB-OIII-1.25","price":104.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/antlia-h-beta-and-oiii-visual-and-astrophotography-filter-125-852119.webp?v=1782294572"},{"product_id":"antlia-ir-pass-685nm-1-25","title":"Antlia IR Pass 685nm 1.25\"","description":"\u003ch1 class=\"title page-title\"\u003eAntlia IR Pass 685nm  Planetary Imaging Filter - Mounted in 1.25\" Filter Cell (31.8mm)\u003c\/h1\u003e\n\n\u003cp\u003eThe Antlia IR Pass 685nm filter is an absorption filter that allows infrared light with wavelengths of more than 685nm to pass through. It nicely complements the Antlia 850nm IR-Pass filter. At these longer wavelengths, the sensitivity of the unaided eye is reduced, so it is not suitable for visual observations. The Antlia IR Pass 685nm is highly recommended for any planetary photography. At long-wavelength spectral range the atmospheric air turbulence (seeing) has much lower impact on the sharpness. The closer to the infrared band, planetary images are less disturbed by wave front distortions in the atmosphere (seeing), and this results in the sharpest and highest contrast images possible.\u003c\/p\u003e\n\n\u003cp\u003eBy combining a luminance image taken with the Antlia IR Pass 685nm along with RGB and U-Venus filters, overall image sharpness is significantly enhanced and details of planets in different bands are taken. This filter makes it also possible to image some planets during daylight due to the dark background sky created by the 685nm IR Pass Filter.\u003c\/p\u003e\n\n\u003ch3\u003eAntlia IR Pass 685nm Technical Data:\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eSchott optical substrate\u003c\/li\u003e\n\t\u003cli\u003e1.25” mounted (2mm+\/-0.05mm)\u003c\/li\u003e\n\t\u003cli\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\t\u003cli\u003eBoth sides fine-optically polished to ensure accurate 1\/4 wave front\u003c\/li\u003e\n\t\u003cli\u003e30 arcsec parallelism\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAntlia IR Pass 685nm Filter Cell (specifications for cell mounted filters only):\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e1.25” (M28.5*0.6)\u003c\/li\u003e\n\t\u003cli\u003eUltra-thin filter cell to minimize vignetting by maximized possible clear aperture\u003c\/li\u003e\n\t\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\t\u003cli\u003eNon-Fading Laser Engraving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Sizes：\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eMounted： 1.25” (2mm thickness)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\n\u003cbr\u003e\nNot recommended for:\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eSolar Observing and imaging\u003c\/li\u003e\n\t\u003cli\u003eVisual observation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cspan\u003eIMPORTANT!\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003cbr\u003e\nSerious eye damage will result if you fail to observe the warning.\u003c\/p\u003e\n\n\u003ch3\u003eIn the box:\u003c\/h3\u003e\n\n\u003cp\u003e1 pc IR-Pass 685nm filter in a Plastic case\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":42278679937201,"sku":"ANT-IR685-1.25","price":41.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/antlia-ir-pass-685nm-planetary-imaging-filter-125-272456.webp?v=1782294591"}],"url":"https:\/\/www.darkclearskies.co.uk\/collections\/antlia-planetary-observing-filters.oembed","provider":"Dark Clear Skies ","version":"1.0","type":"link"}