{"title":"Antlia Solar Equipment","description":"\u003cp\u003eExplore Antlia solar equipment at Dark Clear Skies.\u003c\/p\u003e","products":[{"product_id":"antlia-solar-discover-5a-cak-assembly-standard","title":"Antlia Solar Discover 5A CaK Assembly- Standard","description":"\u003ch1\u003eAntlia Solar Discover Dual Band Ha, CaK and CaH Filter Assembly - Standard\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband (Ha, CaK, and CaH) filter assembly comes in both standard and mini versions. It is specifically designed for solar photosphere photography, effectively enhancing contrast and sharpness in solar imaging. This results in greater visibility of surface details and highlights of sunspots, while also providing higher contrast for solar faculae.\u003c\/p\u003e\n\u003cp\u003eThe complete assembly comes with a Antlia Energy Rejection Filter (ERF) filter, functions to block UV and IR light, which allows the desired wavelengths Ha 656.3nm, CaK 393.3nm, and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003cp\u003eIn addition, necessary ND filter is already manufacture installed in the tube.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNew tube structure design is used for the Antlia Solar Discover Dualband filter assembly，installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The filters are assembled in a fully closed tube and the metal tube machined from aircraft aluminum CNN and oxidized. No stray light can escape from this.\u003c\/li\u003e\n\u003cli\u003eCompared to other solar reducing films, the Antlia Solar Discover Dualband filter assembly offers superior advantages: it enables higher contrast for solar imaging, higher resolution of the solar surface, and the design less susceptible to wear and tear. Additionally, it's user-friendly, ensuring ease of use, and boasts an extended lifespan for your equipments used for solar imaging.\u003c\/li\u003e\n\u003cli\u003eIt can be directly used for solar Photosphere imaging, such as sunspots.\u003c\/li\u003e\n\u003cli\u003e1.25\" and 2\" Adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband Ha, CaK and CaH filter assembly combines the 1.25'' and 2'' adapter used in astrophotography for easier and faster connection of telescopes and cameras. The standard version is compatible with both 1.25'' and 2'' adapters, while the mini version is designed with 1.25'' adapter.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eProduct Installation Diagram\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/catalog\/product\/ANTLIA\/CaK\/ANT-SolDis-HaCaKCaH-MINI-antlia-solar-discover-dual-band-ha,-cak-and-cah-filter-assembly-mini-diagram.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e-\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eWhen you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.\u003c\/p\u003e\n\u003cp\u003e- When you are using a telescope with an aperture ＞100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover Dualband Ha, CaK and CaH filter Assembly; If without the extra light reduction solution, the Solar Discover Discover Dualband Assembly can only used with REFRACTORS up to 100mm aperture.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eAbout Visual Observation\u003c\/h2\u003e\n\u003cp\u003eThe IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https:\/\/eclipse.aas.org\/eye-safety\/iso12312-2).\u003c\/p\u003e\n\u003cp\u003eFor tough technical requirements and safety considerations, we do not recommend Solar Discover Dualband Ha, CaK and CaH filter assembly for visual observation. If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.\u003c\/p\u003e\n\u003cp\u003ePlease contact Antlia if you have any question.\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"676\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" valign=\"center\" width=\"372\"\u003e\n\u003cp\u003e\u003cstrong\u003eISO12312-2 Transmittance Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia Transmittance Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e(Solar Discover 5Å CaK， Solar Discover 3nm CaK Assembly，Dualband Ha, CaK and CaH filter Assembly，ERF)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eRequirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003eWavelength Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003eWavelength Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.0032%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e380-780nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e380-780nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmin%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.000061%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%（UVB）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.0032%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e280-315nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e280-315nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%（UVA）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.0032%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e315-380nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e315-380nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%（IR）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e3%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e780-2000nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e780-1700nm\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty: 3-years\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange for this item is not accepted once it has been disassembled.\u003c\/p\u003e\n\u003ch2\u003eSpectrum Curve\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/catalog\/product\/ANTLIA\/CaK\/ANT-SolDis-HaCaKCaH-MINI-antlia-solar-discover-dual-band-ha,-cak-and-cah-filter-assembly-mini-spectrum.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eImaging Sample Photo\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Sample Photo-61.jpg\" height=\"1000\" src=\"https:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgqKPrrwYoq4TYqQYw6Ac46Ac.jpg\" width=\"1000\"\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":54920442675576,"sku":"ANT-SolDis-HaCaKCaH-STNRD","price":156.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/ANT-SolDis-HaCaKCaH-STNRD-antlia-solar-discover-dual-band-ha_-cak-and-cah-filter-assembly-standard-1000x1000w.jpg?v=1738599070"},{"product_id":"antlia-solar-discover-cak-calcium-k-5a-imaging-solar-filter-assembly","title":"Antlia Solar Discover CaK Calcium-K 5A Imaging Solar Filter Assembly","description":"\u003ch1\u003eAntlia Solar Discover CaK Calcium-K 5A Imaging Solar Filter Assembly\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Solar Discover 5Å CaK assembly incorporates a set of light-reducing filters to reduce solar heat ingress for safe operation during solar imaging. It is specifically engineered to enhance imaging contrast for Plages, Light Bridges, features prominent in the CaK 393.3nm line and sunspots.\u003c\/p\u003e\n\u003cp\u003eThe Antlia 5Å Ultra Narrow Bandpass Filter is built in, it features a clear aperture of D12mm (B1200) and a wavelength centered on the Calcium II K-Line at 393.3nm. With its ultra-narrow full width at half maximum (FWHM) of 0.5nm, it enables the capture of details in the Chromosphere.\u003c\/p\u003e\n\u003cp\u003eInstallation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The metal tube machined from aircraft aluminum CNN and oxidized. The filters are assembled within a fully enclosed tube, preventing stray light into it.\u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIf you do not use the Barlow lens, your telescope must has a focal ratio ＞7.\u003c\/li\u003e\n\u003cli\u003eOptional 2X,3X and 5X Barlow lenses are available, Antlia specifically designed for Solar Discover 5Å CaK ; please order them separately if required. Please refer to the installation diagram and an installation video can be supplied for your reference.\u003c\/li\u003e\n\u003cli\u003eOptional 50mm and 70mm extension tube are provided by Antlia for better focus. please order them separately if required.\u003c\/li\u003e\n\u003cli\u003eWhen you are using a zenith mirror, or Barlow lens supplied by other manufacturer, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.\u003c\/li\u003e\n\u003cli\u003eWhen you are using a telescope with an aperture ＞100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover 5Å CaK; If without the extra light reduction solution, the Solar Discover 5Å CaK can only used with REFRACTORS up to 100mm aperture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Installation Diagram\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/CaK\/SolarDiscover5ACaK-antlia-solar-discover-cak-calcium-k-5%C3%A5-imaging-solar-filter-assembly-diagram.webp\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/CaK\/SolarDiscover5ACaK-antlia-solar-discover-cak-calcium-k-5%C3%A5-imaging-solar-filter-assembly-diagram.webp\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eAbout Visual Observation\u003c\/h2\u003e\n\u003cp\u003eThe bandpass of CaK (393.3 nm) is almost invisible to the human eyes, hence, the Antlia Solar Discover 5Å CaK assembly is primarily used for solar imaging and not recommended for visual observation due to the difficulty of many to visually see information that CaK has to offer.\u003c\/p\u003e\n\u003cp\u003eIn addition, the IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https:\/\/eclipse.aas.org\/eye-safety\/iso12312-2)\u003c\/p\u003e\n\u003cp\u003eFor tough technical requirements and safety considerations, we do not recommend Solar Discover 5Å CaK assembly for visual observation.If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.\u003c\/p\u003e\n\u003cp\u003ePlease contact Antlia if you have any questions.\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"676\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" valign=\"center\" width=\"372\"\u003e\n\u003cp\u003e\u003cstrong\u003eISO12312-2 Transmittance Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia Transmittance Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e(Solar Discover 5Å CaK， Solar Discover 3nm CaK Assembly，Dualband Ha, CaK and CaH filter Assembly，ERF)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eRequirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003eWavelength Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003eWavelength Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003eTmax%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e0.0032%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e380-780nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e380-780nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003eTmin%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e0.000061%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003eTmax%（UVB）\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e0.0032%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e280-315nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e280-315nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003eTmax%（UVA）\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e0.0032%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e315-380nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e315-380nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003eTmax%（IR）\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e3%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e780-2000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e780-1700nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty: 3-years\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange for this item is not accepted once it has been disassembled.\u003c\/p\u003e\n\u003ch2\u003eProduct Structure Diagram\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" id=\"picParametersTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ch2\u003eImaging Sample Photo:\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"5Å sample photo.jpg\" height=\"1289\" src=\"https:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg89PqrwYowIGy_wcw8Qs4iQo.jpg\" width=\"1521\"\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"No Barlow","offer_id":54920616771960,"sku":"SolarDiscover5ACaK","price":921.0,"currency_code":"GBP","in_stock":true},{"title":"with x2 Barlow Lens","offer_id":54920614740344,"sku":"SolarDiscover5ACaK-2xBarlow","price":974.0,"currency_code":"GBP","in_stock":true},{"title":"With x3 Barlow Lens","offer_id":54920614707576,"sku":"SolarDiscover5ACaK-3xBarlow","price":974.0,"currency_code":"GBP","in_stock":true},{"title":"With x5 Barlow Lens","offer_id":54920614674808,"sku":"SolarDiscover5ACaK-5xBarlow","price":984.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/SolarDiscover5ACaK-antlia-solar-discover-cak-calcium-k-5a-imaging-solar-filter-assembly-2-1000x1000w.webp?v=1738600075"},{"product_id":"antlia-imaging-herschel-wedge","title":"Antlia Imaging Herschel-wedge","description":"\u003ch1\u003eAntlia Imaging Herschel-wedge with 35mm Prism and 1.25\" CaK Calcium-K 3nm 393.3nm Imaging Solar Filter\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Antlia Solar Wedge (Herschel Wedge design) replaces the standard prism diagonal at the rear of refractor telescopes to enable imaging of solar granulation and sunspots. The Herschel Wedge design is well known to give sharper, higher-contrast images. The Antlia Solar Wedge design transmits a greatly reduced, safe amount of light to your imaging camera. The image brightness can be conveniently increased or decreased using a control ring with aperture blades, similar to that used in camera lenses.\u003c\/p\u003e\n\u003cp\u003eOur Herschel Wedge is produced using CNC machining and the optical components are multi-coated with anti-reflection coatings to minimize both internal reflections and contrast reducing stray light. The solar wedge incorporates an Antlia 3nm narrow bandpass filter at the Calcium II K-Line centered on 393.3nm and mounted in a standard 1.25’’ holder.\u003c\/p\u003e\n\u003cp\u003eUnlike some other solar wedge designs which may get too hot, the Antlia Imaging Solar Wedge directs energy into an extra thick Polycrystalline Ceramic diffuser plate at the rear of the Wedge. In addition, cooling vents above the ceramic plate facilitate efficient cooling of the system.\u003c\/p\u003e\n\u003cp\u003eThe Antlia Cak 3nm solar prism system provides for the safe management of harmful light intensity and heat when imaging the sun. The system is comprised of a prism, Cak lens filter, sun centering finder and a heat dissipation system. The sun’s light passes through the right-angle prism and excess heat is transferred to the rear fins that act as a heat sink for cooling the instrument. This heat management system effectively keeps the the instrument at safe operating temperatures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication and Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType of build: Herschel 35mm prism\u003c\/li\u003e\n\u003cli\u003eIntegrated ceramic heat dispersion diffuser\u003c\/li\u003e\n\u003cli\u003eSharp CaK 3nm 393.3nm solar filter screwed into eyepiece holder base\u003c\/li\u003e\n\u003cli\u003eHigh-resolution imaging of granulation, sunspots, and other features\u003c\/li\u003e\n\u003cli\u003eIncludes a brightness control, a solar finder and effective heat dissipation system\u003c\/li\u003e\n\u003cli\u003eAnti Reflection (AR) coated prism and solar filter\u003c\/li\u003e\n\u003cli\u003eHigh blocking specification to reject solar heat ingress\u003c\/li\u003e\n\u003cli\u003eSturdy CNC machined construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/CaK\/antlia-imaging-herschel-wedge-with-35mm-prism-and-1.25-cak-calcium-k-3nm-393.3nm-imaging-solar-filter-4.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCaK 3nm 393.3nm Filter Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Antlia Solar Wedge prism and internal CaK solar filter are made of heat resistant double-polished substrate. Antlia CaK 393.3nm solar filter uses the most advanced multicoatings to produce a sharp 3nm narrow bandpass, designed to maximize contrast for high-resolution imaging of sun spots, solar surface granulation and other features that are prominent in CaK light.\u003c\/p\u003e\n\u003cp\u003eA high blocking specification of OD5 (0.001%) between 200-1200nm wavelengths and OD3 (0.1%) between 1200-1500nm wavelengths delivers superb resolution for imaging with the Antlia Cak 3nm solar filter.   It should be noted that the bandpass for Cak (393nm) makes solar features almost invisible to human vision because of the eye's low sensitivity and poor resolving ability at the CaK frequency. Hence, the Antlia Solar Wedge with CaK filter is not recommended for visual observation. It is designed for imaging with cameras that have spectral responses well beyond human vision.\u003c\/p\u003e\n\u003cp\u003eNever look into the sun with the K-Line filter alone, although you don’t perceive it, there is a lot of harmful UV radiation entering your eye.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe Antlia Herschel Wedge is intended for imaging ONLY. \u003cstrong\u003eIt is not suitable for visual observation.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eIt is not intended for solar prominence imaging and visual use.\u003c\/li\u003e\n\u003cli\u003eMust be used only with refractor telescopes to avoid damage to the telescope.\u003c\/li\u003e\n\u003cli\u003eRefractor aperture must be no larger than 120mm or, focal ratio of F5.5 or longer (slower).\u003c\/li\u003e\n\u003cli\u003eNever use the Solar wedge without the supplied CaK narrowband filter. Otherwise irreparable eye damage can result.\u003c\/li\u003e\n\u003cli\u003eDisassembly of prism is prohibited and voids warranty. Any repair\/returns\/exchange for this item is not accepted once it has been disassembled.\u003c\/li\u003e\n\u003cli\u003eWarranty guarantee: 1 year\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":54920520270200,"sku":"ANT-3.0CaKWEDGE","price":355.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/antlia-imaging-herschel-wedge-with-35mm-prism-and-1.25-cak-calcium-k-3nm-393.3nm-imaging-solar-filter-0-1000x1000h.webp?v=1782294574"},{"product_id":"antlia-solar-discover-dual-band-ha-cak-and-cah-filter-assembly-mini","title":"Antlia Solar Discover Dual Band Ha, CaK and CaH Filter Assembly - Mini","description":"\u003ch1\u003eAntlia Solar Discover Dual Band Ha, CaK and CaH Filter Assembly - Mini\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband (Ha, CaK, and CaH) filter assembly comes in both standard and mini versions. It is specifically designed for solar photosphere photography, effectively enhancing contrast and sharpness in solar imaging. This results in greater visibility of surface details and highlights of sunspots, while also providing higher contrast for solar faculae.\u003c\/p\u003e\n\u003cp\u003eThe complete assembly comes with a Antlia Energy Rejection Filter (ERF) filter, functions to block UV and IR light, which allows the desired wavelengths Ha 656.3nm, CaK 393.3nm, and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003cp\u003eIn addition, necessary ND filter is already manufacture installed in the tube.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNew tube structure design is used for the Antlia Solar Discover Dualband filter assembly，installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The filters are assembled in a fully closed tube and the metal tube machined from aircraft aluminum CNN and oxidized. No stray light can escape from this.\u003c\/li\u003e\n\u003cli\u003eCompared to other solar reducing films, the Antlia Solar Discover Dualband filter assembly offers superior advantages: it enables higher contrast for solar imaging, higher resolution of the solar surface, and the design less susceptible to wear and tear. Additionally, it's user-friendly, ensuring ease of use, and boasts an extended lifespan for your equipments used for solar imaging.\u003c\/li\u003e\n\u003cli\u003eIt can be directly used for solar Photosphere imaging, such as sunspots.\u003c\/li\u003e\n\u003cli\u003e1.25\" and 2\" Adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband Ha, CaK and CaH filter assembly combines the 1.25'' and 2'' adapter used in astrophotography for easier and faster connection of telescopes and cameras. The standard version is compatible with both 1.25'' and 2'' adapters, while the mini version is designed with 1.25'' adapter.\u003c\/p\u003e\n\u003ch2\u003eProduct Installation Diagram\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/catalog\/product\/ANTLIA\/CaK\/ANT-SolDis-HaCaKCaH-MINI-antlia-solar-discover-dual-band-ha,-cak-and-cah-filter-assembly-mini-diagram.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e-\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eWhen you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.\u003c\/p\u003e\n\u003cp\u003e- When you are using a telescope with an aperture ＞100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover Dualband Ha, CaK and CaH filter Assembly; If without the extra light reduction solution, the Solar Discover Discover Dualband Assembly can only used with REFRACTORS up to 100mm aperture.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDue to different batches, the mini version will have 2 appearances, the function and installation are the same.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eAbout Visual Observation\u003c\/h2\u003e\n\u003cp\u003eThe IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https:\/\/eclipse.aas.org\/eye-safety\/iso12312-2).\u003c\/p\u003e\n\u003cp\u003eFor tough technical requirements and safety considerations, we do not recommend Solar Discover Dualband Ha, CaK and CaH filter assembly for visual observation. If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.\u003c\/p\u003e\n\u003cp\u003ePlease contact Antlia if you have any question.\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"676\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" valign=\"center\" width=\"372\"\u003e\n\u003cp\u003e\u003cstrong\u003eISO12312-2 Transmittance Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia Transmittance Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e(Solar Discover 5Å CaK， Solar Discover 3nm CaK Assembly，Dualband Ha, CaK and CaH filter Assembly，ERF)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eRequirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003eWavelength Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003eWavelength Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.0032%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e380-780nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e380-780nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmin%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.000061%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%（UVB）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.0032%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e280-315nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e280-315nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%（UVA）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.0032%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e315-380nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e315-380nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003eTmax%（IR）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e3%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e780-2000nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e780-1700nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty: 3-years\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange for this item is not accepted once it has been disassembled.\u003c\/p\u003e\n\u003ch2\u003eSpectrum Curve\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/catalog\/product\/ANTLIA\/CaK\/ANT-SolDis-HaCaKCaH-MINI-antlia-solar-discover-dual-band-ha,-cak-and-cah-filter-assembly-mini-spectrum.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eImaging Sample Photo\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Sample Photo-61.jpg\" height=\"1000\" src=\"https:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgqKPrrwYoq4TYqQYw6Ac46Ac.jpg\" width=\"1000\"\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":54920557134200,"sku":"ANT-SolDis-HaCaKCaH-MINI","price":104.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/ANT-SolDis-HaCaKCaH-MINI-antlia-solar-discover-dual-band-ha_-cak-and-cah-filter-assembly-mini-1-1000x1000w.jpg?v=1738602568"},{"product_id":"antlia-solar-discover-dualband-energy-rejection-filter-erf-2","title":"Antlia Solar Discover Dualband Energy Rejection Filter (ERF) - 2\"","description":"\u003ch1\u003eAntlia Solar Discover Dualband Energy Rejection Filter (ERF) - 2\"\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Dualband Solar Energy Rejection Filter is designed by combining Hydrogen Alpha, Calcium K-Line and Calcium H-Line in one dualband filter. It is the filter used in conjunction with Antlia Solar Discover 3nm CaK, Solar, 5Å CaK or similar product to protect your solar imaging equipments from high temperature and bandpass shifting by rejecting massive heat before it enters telescope when imaging and observing solar.\u003c\/p\u003e\n\u003cp\u003eThey are very effective at blocking the UV and IR part of the spectrum, and allow the desired wavelengths of Ha 656.3nm, CaK 393.3nm and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003ch2\u003eProduct Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM 25nm with CWL at H-alpha wavelength of 656.3nm; Transmission: T＞95%\u003c\/li\u003e\n\u003cli\u003eFHWM 25nm with CWL at CaK wavelength 393.3nm covering Calcium K-Line 393.3nm and Calcium K-Line 396.8nm; Transmission: T＞90%\u003c\/li\u003e\n\u003cli\u003eCoating Range: 200-1700nm wavelengths\u003c\/li\u003e\n\u003cli\u003eFinished with the most advanced multicoatings\u003c\/li\u003e\n\u003cli\u003eCoated on heat resistant double-polished substrate\u003c\/li\u003e\n\u003cli\u003eAntlia ERF 130mm, 150mm，200mm filters are mounted in a housing\/cell to hold it in front of a telescope tube\u003c\/li\u003e\n\u003cli\u003eAntlia ERF 2’’ mounted filter is supposed to be installed at the back end of a refractor telescope, but before any other optical element(s), i.e. reducer, flattener, Barlow, star diagonal, prism etc.\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront: Lambda\/4 or better.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"633\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003eAntlia Dual ERF Filter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003eH-alpha\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003eCaK \u0026amp; CaH\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003eFWHM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e25nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e25nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003eHa 656.3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003eCaK 393nm covering CaK 393.3nm \u0026amp; CaH 396.8nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003eCoating Range\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e200-1700nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e10mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003eSize\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003eERF glass 130mm with cell, for 130-190mm Fixed diameter\u003c\/p\u003e\n\u003cp\u003eERF glass 150mm with cell, for 150-220mm Fixed diameter\u003c\/p\u003e\n\u003cp\u003eERF glass 200mm with cell, for 200-250mm Fixed diameter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSpectral Transmission\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/ANTLIA\/ERF\/antlia-dual-band-erf-transmission.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003e- The Antlia Dual ERF filters cannot be used on its own. It must be used together with the professionally made solar imaging equipments, which have their own complete blocking filters assembled. Such as Antlia Solar Discover 5Å CaK, Solar Discover 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly;\u003c\/p\u003e\n\u003cp\u003e- Please do not use the Antlia Dualband ERF filter by itself for visual observation;\u003c\/p\u003e\n\u003cp\u003e- 2’’ ERF filter must working on 110mm or smaller refractors.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eAvailable Sizes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e2\" (in a standard 2\" filter cell),\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDia130mm,\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDia150mm\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDia200mm\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty: 3-years\u003c\/strong\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":54920566767992,"sku":"SolarDiscover-DB-ERF-2inch","price":104.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/antlia-solar-discover-dualband-energy-rejection-filter-_erf_-2-inch-1000x1000w.webp?v=1782294744"},{"product_id":"antlia-1-25-adjustable-aperture-diaphragm","title":"Antlia 1.25\" Adjustable Aperture Diaphragm","description":"\u003ch1 class=\"page-title\"\u003e\u003cspan class=\"base\" data-ui-id=\"page-title-wrapper\"\u003eAntlia 1.25\" Adjustable Aperture Diaphragm for 5Å CaK Solar Discover Assembly\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003eWhen using the Solar Discover 5Å CaK Assembly, the Antlia 1.25\" variable aperture diaphragm helps filter out stray light, enhancing image contrast. It allows for real-time adjustment, reaching optimal contrast at approximately half open (D=12 see second image above), or it can be fine-tuned as needed for a specific condition.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable aperture range: Dia 2.0 - 25mm\u003c\/li\u003e\n\u003cli\u003eAdapter: 1.25''\u003c\/li\u003e\n\u003cli\u003eOptical height: 34mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":54920577876344,"sku":"ANT-AdjDiaphragm","price":68.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/AntliaApertureDiaphragmPicture1-1000x1000.webp?v=1738603189"},{"product_id":"antlia-70mm-extension-tube-for-solar-discover-cak-5a","title":"Antlia 70mm Extension Tube for Solar Discover CaK 5Å","description":"\u003ch1\u003eAntlia 70mm Extension Tube for Solar Discover CaK 5Å Assembly \u003c\/h1\u003e\n\u003cp\u003eThis is a 2\" extension tube with 70mm optical length for the Antlia Solar Discover 5Å CaK assembly. \u003c\/p\u003e\n\u003cp\u003eWhen you use the Antlia Solar Discover 5Å CaK assembly with a refractor telescope without a star diagonal (mirror diagonal), you will most likely need to compensate for that length to achieve focus. \u003c\/p\u003e\n\u003cp\u003eThis extension is available in two sizes, 50mm and 70mm optical length. \u003c\/p\u003e\n\u003cp\u003eThis product listing is for the 70mm version.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrass compression ring\u003c\/li\u003e\n\u003cli\u003eBlack anodised, in and out\u003c\/li\u003e\n\u003cli\u003e3 x thumbscrews\u003c\/li\u003e\n\u003cli\u003eTotal length: 100mm\u003c\/li\u003e\n\u003cli\u003eOptical length: 70mm (although this can be slightly extended if you don't push it fully in into the focuser's eyepiece holder drawtube...be reasonable with this, but it might add an extra 10-15mm as the length of that part is 30mm)\u003c\/li\u003e\n\u003cli\u003eStandard 2\" filter thread at the bottom end\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":54920594456952,"sku":"SolarDiscover70mmExtension","price":30.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/SolarDiscover70mmExtension-antlia-70mm-extension-tube-for-solar-discover-cak-5a-1000x1000.webp?v=1738603831"}],"url":"https:\/\/www.darkclearskies.co.uk\/collections\/antlia-solar-equipment.oembed","provider":"Dark Clear Skies ","version":"1.0","type":"link"}