{"product_id":"svbony-sv220-2-3nm-narrowband-filter-h-alpha-oiii-for-astrophotography","title":"SVBONY SV220  2\" 3nm Narrowband Filter – H-Alpha \u0026 OIII for Astrophotography","description":"\u003cp\u003e\u003cstrong\u003eUltra-Narrow 3nm Dual-Band Filter – Ideal for Emission and Planetary Nebulae\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe SVBONY SV220 2\" 3nm Narrowband Filter is designed for \u003cstrong\u003ehigh-contrast deep-sky astrophotography\u003c\/strong\u003e, targeting \u003cstrong\u003eH-Alpha (656.3nm) and OIII (500.7nm) emission lines\u003c\/strong\u003e with an \u003cstrong\u003eultra-narrow bandwidth of just 3nm\u003c\/strong\u003e. This filter uses \u003cstrong\u003emulti-layer minimal-halo coating technology\u003c\/strong\u003e to minimize glare and halos, significantly improving \u003cstrong\u003econtrast, color accuracy, and detail sharpness\u003c\/strong\u003e in your images. It effectively blocks unwanted wavelengths, such as light pollution and stray light, ensuring \u003cstrong\u003ecrisp, clean views of nebulae and galaxies\u003c\/strong\u003e even in urban environments.\u003c\/p\u003e\n\u003cp\u003eDesigned for \u003cstrong\u003efull-frame sensors\u003c\/strong\u003e, this filter reduces vignetting in ultra-wide-angle lenses and ensures \u003cstrong\u003euniform brightness from edge to edge\u003c\/strong\u003e, allowing you to capture the full beauty of deep-sky objects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Narrow 3nm Bandwidth\u003c\/strong\u003e: Perfect for capturing \u003cstrong\u003eemission and planetary nebulae\u003c\/strong\u003e with exceptional detail and contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal-Halo Coating\u003c\/strong\u003e: Reduces \u003cstrong\u003eglare and halos\u003c\/strong\u003e, enhancing image purity and color accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Frame Compatibility\u003c\/strong\u003e: Optimized for \u003cstrong\u003efull-frame telescopes and cameras\u003c\/strong\u003e, minimizing vignetting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard M48×0.75 Thread\u003c\/strong\u003e: Fits most \u003cstrong\u003e2\" astrophotography setups\u003c\/strong\u003e with a barrel size of \u003cstrong\u003eΦ50.8 × 7 mm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Transmission Rate\u003c\/strong\u003e: \u003cstrong\u003e≥85% average transmission\u003c\/strong\u003e for H-Alpha and OIII, ensuring bright and detailed images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocking Range\u003c\/strong\u003e: \u003cstrong\u003e300–1050nm\u003c\/strong\u003e with \u003cstrong\u003eOD5 blocking depth\u003c\/strong\u003e, effectively suppressing unwanted light.\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"relative left-1\/2 -translate-x-1\/2\"\u003e\n\u003cdiv data-rich-table-inner-html='\u0026lt;table\u0026gt;\n  \u0026lt;thead\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;th\u0026gt;Feature\u0026lt;\/th\u0026gt;\n      \u0026lt;th\u0026gt;Specification\u0026lt;\/th\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n  \u0026lt;\/thead\u0026gt;\n  \u0026lt;tbody\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Product Size\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;2\"\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Barrel Dimensions\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;Φ50.8 × 7 mm\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Thread Type\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;Single Thread \/ External Thread\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Thread Specification\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;M48 × 0.75 mm\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Material\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;6061T Aluminum Extrusion\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Substrate Thickness\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;2.0 mm\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Clear Aperture\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;44 mm\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Central Wavelengths\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;500.7 nm (OIII) \/ 656.3 nm (H-Alpha)\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Maximum Transmission\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;≥85% (OIII \u0026amp; H-Alpha average)\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Bandwidth (FWHM)\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;3 ± 1 nm (for both OIII and H-Alpha)\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Blocking Wavelength Range\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;300–1050 nm\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Blocking Depth\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;Average OD5\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Surface Quality\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;60\/40\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Surface Flatness\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;Transmitted Wavefront PV ≤ λ\/4\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Parallelism\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;30 arcseconds\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n    \u0026lt;tr\u0026gt;\n      \u0026lt;td\u0026gt;Net Weight\u0026lt;\/td\u0026gt;\n      \u0026lt;td\u0026gt;12.5 g\u0026lt;\/td\u0026gt;\n    \u0026lt;\/tr\u0026gt;\n  \u0026lt;\/tbody\u0026gt;\n\u0026lt;\/table\u0026gt;' data-rich-table-title=\"\" class=\"w-full pt-3\"\u003e\n\u003cdiv class=\"rounded-card-md border-default bg-card min-w-full overflow-hidden border\"\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Dimensions\u003c\/td\u003e\n\u003ctd\u003eΦ50.8 × 7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eSingle Thread \/ External Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Specification\u003c\/td\u003e\n\u003ctd\u003eM48 × 0.75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e6061T Aluminum Extrusion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd\u003e2.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Wavelengths\u003c\/td\u003e\n\u003ctd\u003e500.7 nm (OIII) \/ 656.3 nm (H-Alpha)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Transmission\u003c\/td\u003e\n\u003ctd\u003e≥85% (OIII \u0026amp; H-Alpha average)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e3 ± 1 nm (for both OIII and H-Alpha)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Wavelength Range\u003c\/td\u003e\n\u003ctd\u003e300–1050 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eAverage OD5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Flatness\u003c\/td\u003e\n\u003ctd\u003eTransmitted Wavefront PV ≤ λ\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallelism\u003c\/td\u003e\n\u003ctd\u003e30 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e12.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat’s in the Box?\u003c\/strong\u003e\u003cbr\u003e1x SVBONY SV220 2\" 3nm H-Alpha \u0026amp; OIII Narrowband Filter\u003cbr\u003e1x Protective Case\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Filter Holders\u003c\/strong\u003e (M48×0.75 thread)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFull-frame and APS-C cameras\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMost astronomical telescopes and imaging setups\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal for deep-sky objects\u003c\/strong\u003e such as the Orion Nebula, Eagle Nebula, and Horsehead Nebula\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose the SVBONY SV220 2\" 3nm Filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Contrast\u003c\/strong\u003e: The \u003cstrong\u003e3nm bandwidth\u003c\/strong\u003e isolates emission lines, enhancing nebula details and improving signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight Pollution Suppression\u003c\/strong\u003e: Blocks \u003cstrong\u003eurban skyglow and stray light\u003c\/strong\u003e, allowing for sharp images even in light-polluted areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal Halo Design\u003c\/strong\u003e: Reduces \u003cstrong\u003eglare and halos\u003c\/strong\u003e, ensuring clean and accurate colors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction\u003c\/strong\u003e: Made from \u003cstrong\u003ehigh-quality 6061T aluminum\u003c\/strong\u003e, ensuring long-lasting performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to Use\u003c\/strong\u003e: Simply screw it into your \u003cstrong\u003e2\" filter holder or telescope\u003c\/strong\u003e for instant results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAstrophotographers capturing \u003cstrong\u003eemission and planetary nebulae\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUsers in \u003cstrong\u003elight-polluted areas\u003c\/strong\u003e seeking high-contrast images\u003c\/li\u003e\n\u003cli\u003eSetups requiring \u003cstrong\u003efull-frame compatibility\u003c\/strong\u003e and minimal vignetting\u003c\/li\u003e\n\u003cli\u003eThose needing \u003cstrong\u003ehigh transmission and blocking depth\u003c\/strong\u003e for detailed deep-sky imaging\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"SVBONY UK","offers":[{"title":"Default Title","offer_id":58043757035852,"sku":"[W9198B]","price":249.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/4506\/6060\/files\/815477bf-4f7a-49bd-87bd-a9d90095e284.png?v=1783680655","url":"https:\/\/svbonyuk.com\/products\/svbony-sv220-2-3nm-narrowband-filter-h-alpha-oiii-for-astrophotography","provider":"SVBONY UK ","version":"1.0","type":"link"}