{"product_id":"lumicon-oxygen-iii-oiii-filter-sct-rear-cell-preowned","title":"Lumicon Oxygen III (OIII) Filter - SCT Rear Cell - (Preowned)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cem\u003eThis filter is used, in good condition.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eAbout the Lumicon Oxygen III (OIII) Filter - SCT...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe renowned, original \u003cb\u003eLumicon OIII Filter\u003c\/b\u003e narrow bandpass filter (11nm) isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black background of space and the delicate photons of OIII light needed for near-photographic views of the Veil, Ring, Dumbbell and Orion nebulae, among other objects.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSee for yourself -- it''s truly amazing what the \u003cb\u003eLumicon OIII Filter\u003c\/b\u003e allows you to see! Lumicon tests every filter individually on a Perkin-Elmer Double-Beam spectrophotometer, inscribing on the filter its percentage of transmission for each of the primary lines. Do not settle for cheap, foreign-made imitations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eLumicon Oxygen III (OIII) Filter - SCT Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNarrow band pass filter (11nm) isolates just the two doubly ionized oxygen lines (496nm and 501nm) emitted by planetary and extremely faint nebulae.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduces near-photographic views of the Veil, Ring, Dumbbell, Orion, plus many other nebula.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eConsists of two elements, sandwiched coatings, and anti-reflection coatings on all surfaces to\n\u003cp\u003eprevent ghosting.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eLumicon tests every filter individually on a Perkin-Elmer Double-Beam spectrophotometer, inscribing on the filter its percentage of transmission for each of the primary lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eLumicon Oxygen III (OIII) Filter - SCT Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eFilter Type: OIII\u003c\/p\u003e\n\u003cp\u003eFilter Size: SCT rear cell\u003c\/p\u003e\n\u003cp\u003ePresentation: Round, threaded cell\u003c\/p\u003e\n\u003cp\u003eBandpass: 10-12nm\u003c\/p\u003e\n\u003cp\u003eOptimum Exit Pupil (Light Polluted Skies): 2-5mm\u003c\/p\u003e\n\u003cp\u003eOptimum Exit Pupil (Dark Skies): 3-7mm\u003c\/p\u003e\nLumicon Product Number: LF3050","brand":"Lumicon","offers":[{"title":"Default","offer_id":40252223979633,"sku":"USED91410","price":128.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/IMG_20230914_174624.jpg?v=1776459037","url":"https:\/\/khanscope.com\/en-fr\/products\/lumicon-oxygen-iii-oiii-filter-sct-rear-cell-preowned","provider":"Khan Scope Centre","version":"1.0","type":"link"}