{"product_id":"lumicon-oxygen-iii-oiii-filter-2-48mm-made-in-usa-pre-owned","title":"Lumicon Oxygen III (OIII) Filter - 2\" (48mm) - Made in USA (Pre-owned)","description":"\u003cp\u003e\u003cstrong\u003eIn Good Condition!\u003c\/strong\u003e Original Livermore, California-made Lumicon filter. Inspected by our technicians. Includes the original Lumicon case with its individual transmission test label (the foam liner in the case shows its age).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMeasured transmission on this filter:\u003c\/strong\u003e OIII 496nm: 92% | OIII 501nm: 95% | H-Beta 486nm: 1.3%\u003c\/p\u003e\n\u003cp\u003eThe Lumicon 2\" OIII narrow band-pass filter isolates just the two doubly ionized oxygen lines (496nm and 501nm) emitted by diffuse, planetary and extremely faint nebulae, so these objects stand out against a darkened sky background. It gives near-photographic views of the Veil, Ring, Dumbbell and Orion nebulae, among many other objects, and performs well under both light-polluted and dark skies.\u003c\/p\u003e\n\u003cp\u003eEach Lumicon Oxygen III filter was individually inspected and labelled with the measured light transmission of the two OIII emission lines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Oxygen III (OIII) narrowband visual nebula filter\u003c\/li\u003e\n\u003cli\u003eSize: 2\" mounted, standard 48mm filter thread\u003c\/li\u003e\n\u003cli\u003ePasses: OIII lines at 496nm and 501nm\u003c\/li\u003e\n\u003cli\u003eMade in USA (Lumicon, Livermore, CA)\u003c\/li\u003e\n\u003cli\u003eIncludes: filter and original plastic case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePre-owned item. Includes our 30-day warranty.\u003c\/p\u003e","brand":"Lumicon","offers":[{"title":"Default Title","offer_id":67594759667825,"sku":"USED093001","price":249.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/lumicon-2in-oiii-filter-used-1.jpg?v=1790796000","url":"https:\/\/khanscope.com\/products\/lumicon-oxygen-iii-oiii-filter-2-48mm-made-in-usa-pre-owned","provider":"Khan Scope Centre","version":"1.0","type":"link"}