{"product_id":"svbony-narrowband-filter-3nm-h-alpha-oiii-sv220-w9198","title":"SVBony SV220 3nm Narrowband Filter Ha \u0026 OIII","description":"\u003ch1\u003eNarrowband Filter 3nm H-Alpha \u0026amp; Oiii SV220\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-narrow 3nm (H-Alpha \u0026amp; OIII) bandwidth, ideal for photographing emission and planetary nebulae;\u003c\/li\u003e\n\u003cli\u003eMinimal halo coating design, effectively blocking excess light and reducing halos;\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePerfectly compatible with full-frame telescopes and cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9198b_20250828175857_7509.jpg?v=1757778172\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eMinimal Halo Coating Design\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis narrowband filter Adopts multi-layer minimal halo coating technology, it reduces glare and halo interference. It thereby enhances image contrast and color accuracy, presents sharp celestial details against a clean background, and improves the purity of deep-sky photography images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9198b-1_20250828175909_6166.jpg?v=1757778197\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9198b-3_20250828175937_5948.jpg?v=1757778242\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100.079%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 40.2255%;\"\u003e\u003cstrong\u003e2-inch Version\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 32.5635%;\"\u003e\u003cstrong\u003e1.25-inch Version\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eBandwidth \/ FWHM (H‑α \u0026amp; OIII)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003e~3 nm (ultra‑narrow)\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003e~3 nm ±1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eThread Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eM48 × 0.75\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eM28.5 × 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eBarrel \/ Filter Cell Outside Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eØ50.8 × 7 mm\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eØ31.75 × 7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eOptical Cut‑off \/ Transmission Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003e300 nm – 1050 nm\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003e300 nm – 1050 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eBlocking \/ Out‑of‑Band Suppression\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eAverage OD5 (0.001 %)\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eAverage OD5 (0.001 %)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003ePeak Transmission at Target Lines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003e≥85 % at H‑α \u0026amp; OIII\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003e≥85 % at H‑α \u0026amp; OIII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eCoating \/ Halo Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eMulti-layer, anti-reflection, minimal halo design\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eMulti-layer, anti-reflection, minimal halo design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eDesign Notes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eSuitable for full-frame sensors; minimal vignetting; optimized for light pollution control and enhanced nebula contrast\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eSame features apply; best performance with slower focal ratios (not ultra-fast optics)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"171\" data-end=\"303\"\u003e\n\u003cp data-start=\"173\" data-end=\"303\"\u003e\u003cstrong data-start=\"173\" data-end=\"226\"\u003eSVBONY SV220 3 nm Dual-Band H‑Alpha \u0026amp; OIII Filter\u003c\/strong\u003e\u003cbr data-start=\"226\" data-end=\"229\"\u003e– Available in either \u003cstrong data-start=\"253\" data-end=\"269\"\u003e2-inch (M48)\u003c\/strong\u003e or \u003cstrong data-start=\"273\" data-end=\"294\"\u003e1.25-inch (M28.5)\u003c\/strong\u003e format\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"304\" data-end=\"402\"\u003e\n\u003cp data-start=\"306\" data-end=\"402\"\u003e\u003cstrong data-start=\"306\" data-end=\"341\"\u003eProtective Plastic Storage Case\u003c\/strong\u003e\u003cbr data-start=\"341\" data-end=\"344\"\u003e– Foam-lined interior for secure storage and transport\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"403\" data-end=\"499\"\u003e\n\u003cp data-start=\"405\" data-end=\"499\"\u003e\u003cstrong data-start=\"405\" data-end=\"434\"\u003eMicrofiber Cleaning Cloth\u003c\/strong\u003e\u003cbr data-start=\"434\" data-end=\"437\"\u003e– For safe and scratch-free cleaning of the filter surface\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"500\" data-end=\"600\"\u003e\n\u003cp data-start=\"502\" data-end=\"600\"\u003e\u003cstrong data-start=\"502\" data-end=\"543\"\u003eUser Information Card or Basic Manual\u003c\/strong\u003e\u003cbr data-start=\"543\" data-end=\"546\"\u003e– Filter handling tips and specifications overview\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Svbony","offers":[{"title":"1.25\"","offer_id":47669861810405,"sku":"SVB-W9198A","price":167.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":47669861843173,"sku":"SVB-W9198B","price":347.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_8994f89f-3f71-4f1b-8045-ce116ed41fe3.jpg?v=1777043747","url":"https:\/\/istronomyplus.com\/products\/svbony-narrowband-filter-3nm-h-alpha-oiii-sv220-w9198","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}