{"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=1718364152","url":"https:\/\/www.darkclearskies.co.uk\/products\/antlia-h-beta-oiii-1-25-filter-for-visual-astrophotography-use","provider":"Dark Clear Skies ","version":"1.0","type":"link"}