{"product_id":"antlia-new-solar-discover-dualband-energy-rejection-filter-erf","title":"Antlia Solar Discover Dualband Energy Rejection Filter (ERF)","description":"\u003ch1\u003eAntlia Solar Discover Dualband Energy Rejection Filter (ERF)\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 UV and IR light, and allow the desired wavelengths Ha 656.3nm, CaK 393.3nm and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- FWHM 25nm with CWL at H-alpha wavelength of 656.3nm; Transmission: T＞95%\u003c\/p\u003e\n\u003cp\u003e- FHWM 25nm with CWL at CaK wavelength 393.3nm covering Calcium K-Line 393.3nm and Calcium K-Line 396.8nm; Transmission: T＞90%\u003c\/p\u003e\n\u003cp\u003e- Coating Range: 200-1700nm wavelengths\u003c\/p\u003e\n\u003cp\u003e- Finished with the most advanced multicoatings\u003c\/p\u003e\n\u003cp\u003e- Coated on heat resistant double-polished substrate\u003c\/p\u003e\n\u003cp\u003e- Antlia ERF 130mm, 150mm，200mm filters are mounted in a housing\/cell to hold it in front of the telescope\u003c\/p\u003e\n\u003cp\u003e- Antlia ERF 2’’ mounted filter is installed on the back end of the refractor telescope\u003c\/p\u003e\n\u003cp\u003e- Transmitted Wavefront: Lambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/20564242.s21i.faiusr.com\/4\/2\/ABUIABAEGAAgurvrrwYov732ZzCPCjjgBQ.png\" width=\"1133\" height=\"644\" alt=\"Antlia dualband ERF spectrum.JPG\" class=\"need_fix\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Notes: \u003c\/strong\u003e\u003c\/p\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\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"633\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eAntlia Dual ERF Filter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003eH-alpha\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003eCaK \u0026amp; CaH\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003e25nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003e25nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003eHa \u003cspan name=\"OLE_LINK3\"\u003e656.\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e3\u003c\/span\u003e\u003cspan\u003enm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003eCaK 393nm covering \u003c\/span\u003e\u003cspan\u003eCaK 393.3nm \u0026amp; CaH 396.8nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003ePeak Transmission\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003e9\u003c\/span\u003e\u003cspan\u003e0\u003c\/span\u003e\u003cspan\u003e%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003e90%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eCoating Range\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e\u003cspan\u003e200-1700nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eFilter Thickness\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e\u003cspan\u003e10mm+\/-0.05mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eSize\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e\u003cspan\u003eERF glass\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e130\u003c\/span\u003e\u003cspan\u003emm with cell\u003c\/span\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003efor \u003c\/span\u003e\u003cspan\u003e130-190mm\u003c\/span\u003e\u003cspan\u003e \u003cspan name=\"OLE_LINK4\"\u003eF\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003eixed diameter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eERF glass\u003c\/span\u003e\u003cspan\u003e 150mm with \u003c\/span\u003e\u003cspan\u003ecell,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003efor 1\u003c\/span\u003e\u003cspan\u003e50-220mm\u003c\/span\u003e\u003cspan\u003e Fixed diameter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eERF glass\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e200\u003c\/span\u003e\u003cspan\u003emm with cell\u003c\/span\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003efor \u003c\/span\u003e\u003cspan\u003e200-250mm\u003c\/span\u003e\u003cspan\u003e Fixed diameter\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\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSolar Discover Dualband Energy Rejection Filter (ERF), at selected size :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2\"\u003c\/li\u003e\n\u003cli\u003e130mm\u003c\/li\u003e\n\u003cli\u003e150mm\u003c\/li\u003e\n\u003cli\u003e200mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual \u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/antlia-filters-warranty?_pos=1\u0026amp;_psq=antlia+warran\u0026amp;_ss=e\u0026amp;_v=1.0\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan\u003eWarranty: 3-years\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003efor this item is not accepted once it has been disassembled.\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Antlia","offers":[{"title":"2\"","offer_id":45745460543717,"sku":"AF-ERF-2","price":120.0,"currency_code":"CAD","in_stock":true},{"title":"130mm","offer_id":45745460576485,"sku":"AF-ERF-130","price":1367.0,"currency_code":"CAD","in_stock":true},{"title":"150mm","offer_id":45745460609253,"sku":"AF-ERF-150","price":1781.0,"currency_code":"CAD","in_stock":true},{"title":"200mm","offer_id":45745460642021,"sku":"AF-ERF-200","price":3233.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ABUIABACGAAg8LfrrwYo2Oq7ygIw6Ac46Ac.jpg?v=1777043371","url":"https:\/\/istronomyplus.com\/products\/antlia-new-solar-discover-dualband-energy-rejection-filter-erf","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}