{"product_id":"svbony-sv240-multi-narrowband-filter-galaxy-nebula-nir-near-infrared-light-pollution-2-mounted-for-urban-astrophotography-w9191a","title":"SVBONY SV240 Multi-Narrowband Filter Galaxy \u0026 Nebula Near-infrared Light Pollution","description":"\u003ch1\u003eSVBONY SV240 Multi-Narrowband Filter Galaxy \u0026amp; Nebula Near-infrared Light Pollution \u003c\/h1\u003e\n\u003cp\u003eSVBONY SV240 multi-bandpass filter is designed for urban astrophotography; it can isolate the Ha; OIII; and H-Beta from the background light pollution efficiently; you can astrophotography in urban without a long struggle to suburbs; save your time and high efficiency; and it is suitable for photoing most galaxies; reflection nebulae; emission nebula; and star clusters; and so on. \u003c\/p\u003e\n\u003ch2\u003eCut-off Depth ≥ OD4\u003c\/h2\u003e\n\u003cp\u003eHighly efficient in blocking urban light pollution or other background light; use this multi-bandpass filter for astrophotography in urban without traveling long distances to the suburbs. The SV240 narrowband filter can block the influence of urban light pollution and other background lights efficiently. \u003c\/p\u003e\n\u003cp\u003eFWHM; 24nm; 20 nm; 115 nm; the wide wavelength and high transmittance of this multi-bandpass filters in Ha; OIII; H-Beta wavelength helps the colorful image photoing.\u003c\/p\u003e\n\u003ch1\u003eResistant of BORTLE 8\u003c\/h1\u003e\n\u003cp\u003eThe multilayer coating design for the remarkable performance in tacking light pollution and high transmittance in core wavelength. Astrophotography in urban comfortable. The strong ability to tacking light pollution up to BORTLE 8 allows it can be used in multiple cities, and no need to go to the suburbs. Time and labor saving.\u003c\/p\u003e\n\u003ch2\u003eWavelength Range of The Filter\u003c\/h2\u003e\n\u003cp\u003eThe wide range allows the filter to be used in multiple scenarios. Stronger resistance to light pollution. Near IR (NIR) is blocked up to 1100nm. High ability to process the wavelength from 300 to 1100nm. Effectively isolate the light pollution band.\u003c\/p\u003e\n\u003ch2\u003ePhotography All Kinds of Targets\u003c\/h2\u003e\n\u003cp\u003eThe wavelength can meet the astrophotography needs of most galaxies, reflection nebulae, emission nebula, star clusters, and other broad-spectrum targets. And the targets can be captured in a short time, which is widely used and high efficiency. \u003c\/p\u003e\n\u003cp\u003eIf you have different astrophotography systems, no need to prepare dedicated filters; one SV240 can meet your needs due to its high compatibility. Considering the high quantum efficiency (QE) characteristics of the latest cameras (such as IMX585 and IMX464) in the near-infrared region and also this region less susceptible to artificial light pollution, the SV240 multi-narrowband filter adds high transmission in the near-infrared (NIR) band. This spectrum design improves the image signal-to-noise ratio and contrast by capturing signal in visible bands and NIR regions while maintaining good colour balance and being easier to manage in post-processing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCut-off depth ≥OD4; highly efficient in blocking urban light pollution or other background light; use this multi-bandpass filter for astrophotography in urban without traveling long distances to the suburbs;\u003c\/li\u003e\n\u003cli\u003eCompatible with 99% astrophotography systems; if you have different astrophotography systems, no need to prepare dedicated filters, one SV240 can meet your needs due to its high compatibility;\u003c\/li\u003e\n\u003cli\u003ePhotoing more kinds of targets; SV240 multi-narrowband filter select Ha,OIII,H-Beta wavelength effectively can cover almost photoing needs;\u003c\/li\u003e\n\u003cli\u003eHigh transmittance; the \u0026gt;90% transmittance in core wavelength of Ha,OIII, H-Beta, more objects for your astrophotography by using this multi-bandpass filter;\u003c\/li\u003e\n\u003cli\u003eMulti-bandpass filters; without multiple filters' combination for colorful images; rich color in your lens;\u003c\/li\u003e\n\u003cli\u003eResistant of BORTLE 8; the multi-narrowband filters can be resistant from Bortle 1 to Bortle 8 cities, suitable for almost all urban;\u003c\/li\u003e\n\u003cli\u003e300-1100 mm working wavelength; the wider coverage of this multi-narrowband filter allows it to have a strong ability to tack light pollution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNote: \u003c\/span\u003e\u003c\/strong\u003eOptical filters that use infrared light often cause halos in the NIR region; which are exacerbated by the halos produced by the filter itself.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\" cellspacing=\"0\" cellpadding=\"0\" dir=\"ltr\" border=\"1\" style=\"table-layout: fixed; font-size: 10pt; font-family: Arial; width: 703px; border-collapse: collapse; border: medium;\" data-sheets-root=\"1\" data-sheets-baot=\"1\" height=\"527\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"100\" style=\"width: 266px;\"\u003e \u003ccol width=\"100\" style=\"width: 266px;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSV240\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eName\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 196px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003eMulti-Narrowband Filter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e2-inch or 1.25-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eWavelength Range\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e300-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 196px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003e24nm \u0026amp; 20nm \u0026amp; 115nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eBlocking\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 701px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003e\u0026gt;OD5@300-450nm；\u0026gt;OD4@560-620nm；\u0026gt;OD2\u0026gt;690-750nm； \u0026gt;OD3@940-1100nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003ePeak Transmittance\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 802px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003eT＞95%@486.1nm；T＞92%@495.9nm；T\u0026gt;85%@500.7nm；T\u0026gt;95%@656.3nm； Tavg\u0026gt;95%@830-870nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSurface Quality\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSurface Parallelism\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e1\/4λ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSingle Thread\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 196px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003e12.5g \/ 0.44oz \/0.027lb\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSVBONY SV240 Multi-Narrowband Filter Galaxy \u0026amp; Nebula Near-infrared Light Pollution \u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\"\u003eSVBony's Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"1.25-inch","offer_id":47762725765349,"sku":"SVB-W9191B","price":144.0,"currency_code":"CAD","in_stock":true},{"title":"2-inch","offer_id":47762725798117,"sku":"SVB-W9191A","price":167.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_34ea8596-d083-409d-9149-3b5a569d10cd.jpg?v=1777043470","url":"https:\/\/istronomyplus.com\/products\/svbony-sv240-multi-narrowband-filter-galaxy-nebula-nir-near-infrared-light-pollution-2-mounted-for-urban-astrophotography-w9191a","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}