{"product_id":"chroma-3nm-h-alpha-filter-optimized-for-f-2-8-f-3-6","title":"Chroma 3nm H-Alpha Filter Optimized for f\/2.8-f\/3.6 (27065)","description":"\u003ch2\u003eChroma 3nm H-Alpha Filter Optimized for f\/2.8-f\/3.6\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eH-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma’s f\/3.0 filters are designed to minimize spectral shift and hold their shape better in an f\/3.0 beam.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm H-Alpha Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eChroma Lifetime Warranty\u003cbr\u003e\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\"  Threaded Filter","offer_id":43974528729317,"sku":"CHR-27065-125","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Threaded Filter","offer_id":43974528762085,"sku":"CHR-27065-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":43974528794853,"sku":"CHR-27065-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43974528827621,"sku":"CHR-27065-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":43974528860389,"sku":"CHR-27065-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square Unmounted","offer_id":43974528893157,"sku":"CHR-27065-50x50","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-h-alpha-filter-optimized-for-f2-8-f3-6-27065-astronomy-plus.webp?v=1690489381","url":"https:\/\/istronomyplus.com\/products\/chroma-3nm-h-alpha-filter-optimized-for-f-2-8-f-3-6","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}