{"product_id":"chroma-3nm-oiii-filter-optimized-for-f-2-8-f-3-6-used-27066-u","title":"Chroma 3nm OIII Filter Optimized for f\/2.8-f\/3.6 OLDER MODEL - USED (27066-U)","description":"\u003ch2\u003eChroma 3nm OIII Filter Optimized for f\/2.8-f\/3.6 - USED (OLDER MODEL)\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eChroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. 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\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 OIII Filter f\/3 optimized 2\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Chroma","offers":[{"title":"2\" Threaded Filter","offer_id":48129080131813,"sku":"CHR-27066-2-U","price":999.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma.webp?v=1765050460","url":"https:\/\/istronomyplus.com\/products\/chroma-3nm-oiii-filter-optimized-for-f-2-8-f-3-6-used-27066-u","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}