{"product_id":"svbony-sv132-1-25-h-beta-25nm-light-pollution-filter","title":"SVBONY SV132 1.25'' H-Beta 25nm Light Pollution Filter (W9102A)","description":"\u003ch2\u003eSVBONY SV132 1.25'' H-Beta 25nm Light Pollution Filter\u003c\/h2\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eSV132 H-Beta eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies;Great used with a moderate to large aperture telescope and clear dark skies\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eOptical high precision double side polishing; Filter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces; Avoid halos\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003ePrecision double-sided optical coatings improve transmission and cut-off depth; Executes with a transmission of over 90% and completely rejects light pollution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eHigh value transmission of pass-band and optical density of off-band is assured through planetary rotation system, a homogenous and precise coating procedure; The high optical quality of SV132 filters guarantees no loss in sharpness or contrast\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eFilter with metal mount 1.25\" filter threads; Threaded to fit 1.25\" eyepieces and threaded diagonal barrels\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"a-list-item\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6372991326672431911273645_480x480.jpg?v=1686151004\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1. Each Svbony filter has an ultra hard, vacuum-deposited coating carefully designed to observe the Orion Horsehead Nebula and the California Nebula, which are difficult to capture. This eliminates the un-natural colored halos surrounding bright stars common with H-Beta filters of less sophisticated coating technology\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2. The 1.25'' Svbony H-Beta filters suitable for viewing bright nebulae, and matching with large-aperture telescopes to observe linear spectrum nebulae,such as the M42 Orion Nebula under severe light pollution, emission nebulae, planetary stars \u0026amp; supernova remnants\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e3. Suitable for viewing on the faint and elusive Horsehead Nebula and California Nebula\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"a-list-item\"\u003eTechnical Specifications \u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; width: 535px; box-sizing: border-box; border-spacing: 0px; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" width=\"128\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\" height=\"294\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 48pt;\" span=\"2\" width=\"64\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 15.75pt; box-sizing: border-box;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; width: 307.344px; box-sizing: border-box; text-align: center;\" class=\"xl63\" height=\"21\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003eW9102A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.75pt;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"21\"\u003eSize \u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e1.25''\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eThread Size\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eBlocking area\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eTransmittance\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e80% at 486nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 45.75pt;\" height=\"61\"\u003e\n\u003ctd style=\"height: 45.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"61\"\u003eTransmission Hg\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e0.1% at 435nm and 578nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eTransmission Na\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e0.1% at 589nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.75pt;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"21\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e25±3nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.75pt;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"21\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box \u003c\/h3\u003e\n\u003cp\u003e1.25'' H-Beta 25nm Light Pollution Filter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":44097115619557,"sku":"SVB-W9102A","price":72.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-sv132-1-25-h-beta-25nm-light-pollution-filter-w9102a-astronomy-plus-1.png?v=1690490612","url":"https:\/\/istronomyplus.com\/products\/svbony-sv132-1-25-h-beta-25nm-light-pollution-filter","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}