{"product_id":"chroma-3nm-sii-filter-optimized-for-f-2-8-f-3-6-27067","title":"Chroma 3nm SII Filter Optimized for f\/2.8-f\/3.6 (27067)","description":"\u003ch2\u003eChroma 3nm SII Filter Optimized for f\/2.8-f\/3.6\u003c\/h2\u003e\n\u003cp\u003eSII filters isolate the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma’s f\/3.0 filters are designed to minimize spectral shift and hold their shape better in an f\/3.0 beam.\u003cbr\u003e\u003cbr\u003e\u003c\/p\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 SII 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\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" Threaded Filter","offer_id":43974657573093,"sku":"CHR-27067-125","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Threaded Filter","offer_id":43974657605861,"sku":"CHR-27067-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":43974657638629,"sku":"CHR-27067-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43974657671397,"sku":"CHR-27067-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":43974657704165,"sku":"CHR-27067-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square Unmounted","offer_id":43974657736933,"sku":"CHR-27067-50x50","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-sii-filter-optimized-for-f2-8-f3-6-27067-astronomy-plus.webp?v=1690489387","url":"https:\/\/istronomyplus.com\/products\/chroma-3nm-sii-filter-optimized-for-f-2-8-f-3-6-27067","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}