{"title":"Nebula Filters","description":null,"products":[{"product_id":"celestron-oxygen-iii-narrowband-filter-1-25-in","title":"Celestron Filtre à Bande Étroite Oxygène III - 1.25\"","description":"\u003c!-- more --\u003e\u003ch2\u003eCaractéristiques\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e Le filtre à bande étroite OIII 1-1\/4\" isole uniquement les deux lignes d'oxygène doublement ionisées (lignes 496 et 501 nm) émises par les nébuleuses planétaires et d'émission, tout en bloquant le reste du spectre global de la lumière\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003e Filtre à bande étroite Celestron Oxygen III - 1,25 po\u003c\/h2\u003e\n\u003cp\u003e Le filtre à bande étroite OIII 1-1\/4\" isole uniquement les deux lignes d'oxygène doublement ionisées (lignes 496 et 501 nm) émises par les nébuleuses planétaires et d'émission, tout en bloquant le reste du spectre global de la lumière. Le résultat est un contraste extrême entre le fond de ciel noir et les photons faibles de la lumière OIII nécessaires pour des vues détaillées des nébuleuses du voile, de l'anneau, de l'haltère, du croissant et d'Orion, entre autres objets.\u003c\/p\u003e \u003cp\u003eChaque filtre a un revêtement ultra dur déposé sous vide soigneusement conçu pour bloquer tout le spectre visuel allant de 400 à 700 nm. Cela élimine les halos colorés non naturels entourant les étoiles brillantes communes avec les filtres O III de technologie de revêtement moins sophistiquée.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149338909,"sku":"CEL-93623","price":132.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Oxygen-III-Narrowband-Filter-1-25-in-93623-1__27739.1594230265.1280.1280.jpg?v=1684337235"},{"product_id":"celestron-oxygen-iii-narrowband-filter-2-in","title":"Celestron Filtre à Bande Étroite Oxygène III - 2\"","description":"\u003c!-- more --\u003e\u003ch2\u003e Caractéristiques\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eLe filtre à bande étroite 2\" OIII isole les deux lignes d'oxygène doublement ionisées (lignes 496 et 501 nm)\u003c\/li\u003e\n\n\u003cli\u003eLe filtre a un revêtement ultra-dur déposé sous vide\u003c\/li\u003e\n\n\u003cli\u003eÉlimine les halos colorés non naturels entourant les étoiles brillantes\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eFiltre à bande étroite Celestron Oxygen III - 2 po\u003c\/h2\u003e \u003cp\u003eLe filtre à bande étroite 2\" OIII isole uniquement les deux lignes d'oxygène doublement ionisées (lignes 496 et 501 nm) émises par les nébuleuses planétaires et d'émission, tout en bloquant le reste du spectre global de la lumière. Le résultat est un contraste extrême entre le fond de ciel noir et les photons faibles de la lumière OIII nécessaires pour des vues détaillées des nébuleuses du voile, de l'anneau, de l'haltère, du croissant et d'Orion, entre autres objets.\u003c\/p\u003e\n\u003cp\u003e Chaque filtre a un revêtement ultra dur déposé sous vide soigneusement conçu pour bloquer tout le spectre visuel allant de 400 à 700 nm. Cela élimine les halos colorés non naturels entourant les étoiles brillantes communes avec les filtres O III de technologie de revêtement moins sophistiquée.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149371677,"sku":"CEL-93624","price":174.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Oxygen-III-Narrowband-Filter-2-in-93624-1__08282.1594230265.1280.1280.jpg?v=1684337236"},{"product_id":"explore-scientific-nebula-filter-h-beta-2-0","title":"Explore Scientific Filtre pour Nébuleuses H-Beta - 2.0\"","description":"\u003c!-- more --\u003eFiltre de nébuleuse Explore Scientific H-Beta - 2,0\"","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967202783517,"sku":"ES-310230","price":251.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-Nebula-Filter-H-Beta-2-0-inch-310230-1__02827.1594240363.1280.1280.jpg?v=1684338905"},{"product_id":"baader-visual-oiii-nebula-filter","title":"Baader Filtre Visuel de Nébuleuse OIII","description":"\u003c!-- more --\u003e \u003cp\u003eFournit les vues de contraste les plus élevées absolues de nombreuses nébuleuses diffuses et planétaires. Pour de nombreux objets, le Baader O-III révèle un niveau de détail complexe qui rivalise avec les meilleures photographies du ciel profond. Notre filtre préféré pour la majorité des nébuleuses, en particulier The Veil, Lagoon (M8), Swan (M17), Ring (M57) et Dumbell (M29). Avec une grande portée, vous pouvez même voir les célèbres \"Piliers de la Création\" à M16 (Eagle).\u003c\/p\u003e\n\u003cp\u003e Le Baader O-III isole parfaitement les deux lignes d'oxygène doublement ionisé (496 et 501 nm), à travers une bande passante très nette et optimalement étroite (largeur de 10 nm). Contrairement aux autres filtres O-III, le Baader O-III bloque complètement les longueurs d'onde plus longues et plus courtes (vous êtes-vous déjà demandé pourquoi certains filtres O-III apparaissent en ROUGE ?, au lieu de la couleur Teal correcte de 500 nm). Le résultat est le contraste le plus élevé pouvant être obtenu dans un filtre O-III.\u003c\/p\u003e \u003cp\u003eL'O-III bénéficie du substrat plat de précision poli optiquement et des revêtements avancés assistés par plasma DWDM. En conséquence, le Baader O-III ne dégradera pas la netteté de l'image et ne donnera pas d'images doubles. Pour éviter la détérioration due au nettoyage ou à l'exposition à l'humidité, certains autres filtres ont même recours à la prise en sandwich de leurs revêtements délicats entre deux couches de verre filtrant, ce qui peut entraîner des images floues ou doubles. Contrairement au mythe, les filtres de nébuleuse sont souvent utiles à des grossissements élevés, où la qualité de l'image compte. Les filtres Baader O-III peuvent prendre des grossissements élevés et les étoiles conservent leur netteté, même si le filtre est utilisé loin en avant du plan image (c'est-à-dire pour une utilisation en imagerie, ou en avant d'une diagonale en étoile ou d'une binoculaire). Combinez avec notre filtre UV\/IR pour le nec plus ultra en matière d'imagerie du ciel profond O-III.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"source=\" https:\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eCourbe de transmission typique\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv data-custom-tab\u003e\n\n\u003cp data-custom-tab-title\u003eCaractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003ch2\u003e1.25\"\u003c\/h2\u003e\n\n\u003ctable\u003e \u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFABRICANT\u003c\/th\u003e\n\n\u003ctd\u003ePlanétarium Baader\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUGS (#)\u003c\/th\u003e\n\n\u003ctd\u003e2458395\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009364\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,059\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eGAMME DE TRANSMISSION\u003c\/th\u003e\n\n\u003ctd\u003eO-III\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eÉPAISSEUR DU FILTRE (SANS CELLULE)\u003c\/th\u003e\n\n\u003ctd\u003e2 millimètres\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003cth\u003eHBW (demi-bande passante)\u003c\/th\u003e\n\n\u003ctd\u003e10nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCWL (LONGUEUR D'ONDE CENTRALE)\u003c\/th\u003e\n\n\u003ctd\u003e502 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eà revêtement diélectrique, plan poli optiquement\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTAILLE DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003e1 25 pouces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUTILISATION DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003eAmélioration du contraste, O-III, Planétaire\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFILTRE MONTÉ\u003c\/th\u003e\n\n\u003ctd\u003eMonté (LPFC 6mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n \u003ctr\u003e\n\n\u003cth\u003eTYPE DE FILTRE\u003c\/th\u003e\n\n\u003ctd\u003eBande étroite\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUNIQUE OU ENSEMBLE ?\u003c\/th\u003e\n\n\u003ctd\u003eFiltre unique\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFORME DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003erond\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003e2\"\u003c\/h2\u003e\n\n\u003ctable\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFABRICANT\u003c\/th\u003e\n\n\u003ctd\u003ePlanétarium Baader\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUGS (#)\u003c\/th\u003e\n\n\u003ctd\u003e2458396\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009357\u003c\/td\u003e\n\n \u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,065\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR\u003c\/th\u003e\n\n\u003ctd\u003eNoir\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eGAMME DE TRANSMISSION\u003c\/th\u003e\n\n\u003ctd\u003eO-III\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eÉPAISSEUR DU FILTRE (SANS CELLULE)\u003c\/th\u003e\n\n\u003ctd\u003e2 millimètres\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eHBW (demi-bande passante)\u003c\/th\u003e\n\n\u003ctd\u003e10nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCWL (LONGUEUR D'ONDE CENTRALE)\u003c\/th\u003e\n\n\u003ctd\u003e502 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003cth\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eà revêtement diélectrique, plan poli optiquement\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTAILLE DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003e2 pouces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUTILISATION DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003eAmélioration du contraste, O-III, Planétaire\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFILTRE MONTÉ\u003c\/th\u003e\n\n\u003ctd\u003eMonté (LPFC 6mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTYPE DE FILTRE\u003c\/th\u003e\n\n\u003ctd\u003eBande étroite\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUNIQUE OU ENSEMBLE ?\u003c\/th\u003e\n\n\u003ctd\u003eFiltre unique\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003cth\u003eFORME DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003erond\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967364133149,"sku":"BAA-2458395","price":153.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967364165917,"sku":"BAA-2458396","price":265.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Visual-OIII-Nebula-Filter-1__58361.1597110989.1280.1280.jpg?v=1684341152"},{"product_id":"optolong-uhc-filter","title":"Filtre UHC Optolong","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cspan\u003eOptolong UHC avec une bande passante plus étroite offre un contraste plus élevé. Ainsi, il est plus adapté à l'environnement urbain où vous souffrez d'une pollution lumineuse sévère.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e Introduction\u003c\/h3\u003e \u003cp\u003e\u003cspan\u003eLe filtre large bande UHC (Ultra High Contrast) est conçu pour améliorer la visibilité de divers objets du ciel profond. En réduisant sélectivement la transmission des longueurs d'onde des polluants lumineux, en particulier ceux produits par les éclairages artificiels, y compris les lampes à vapeur de mercure, les lampes à vapeur de sodium haute et basse pression et la lumière naturelle indésirable causée par l'émission d'oxygène neutre dans notre atmosphère (c'est-à-dire la lueur du ciel). Avec les lignes d'émission de nébuleuse principales hautement transparentes à OIII (496 nm et 500 nm), H-bêta (486 nm), NII (654 nm et 658 nm), H-alpha (656 nm) ainsi que SII (672 nm), le filtre convient pour améliorer le contraste et les détails à des fins visuelles et photographiques dans les zones sous-rurales à forte pollution lumineuse.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUtilisation principale et performances\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eConvient aux caméras CCD couleur et aux reflex numériques non modifiés.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUHC avec une bande passante plus étroite offre un contraste plus élevé que CLS. Ainsi, il est plus adapté à l'environnement urbain où vous souffrez d'une pollution lumineuse sévère.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eUHC a une bande passante rouge substantielle et offre de superbes vues pour des objets comme la nébuleuse d'Orion (M42).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eLe filtre de pollution lumineuse n'élimine pas les effets de la pollution lumineuse et n'augmente pas la luminosité de l'objet. Dans de nombreux cas, ils augmentent le contraste entre la nébuleuse et le ciel nocturne, sans éclaircir la nébuleuse.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e AVERTISSEMENT : Les filtres d'Optolong ne sont pas conçus pour l'observation du soleil. NE PAS REGARDER LE SOLEIL AVEC LE FILTRE OPTOLONG. Vous seriez AVEUGLE si vous ne respectez pas l'avertissement.\u003c\/p\u003e\n\u003ch3\u003e données techniques\u003c\/h3\u003e\n\u003cp\u003e \u003cspan\u003eSubstrat : verre optique\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eTav\u0026gt;95%\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003ePlage de blocage : 300-700 nm\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eProfondeur de blocage : OD3, blocage des lignes de pollution lumineuse \u0026gt; 99 %\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eQualité de surface : 60\/40 (Se référer à\u003c\/span\u003e \u003cspan\u003eMIL-O-13830A, MIL-C-48497A\u003c\/span\u003e \u003cspan\u003e)\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eFront d'onde transmis RMS :\u003c\/span\u003e \u003cspan\u003e¼\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003eλ\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eParallélisme : 30s\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\" Monté","offer_id":44967781695773,"sku":"OPT-10101","price":77.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44967781728541,"sku":"OPT-10102","price":119.0,"currency_code":"CAD","in_stock":true},{"title":"Clip pour Canon EOS APS-C","offer_id":44967781761309,"sku":"OPT-UHC-EOS-APSC","price":133.0,"currency_code":"CAD","in_stock":true},{"title":"Clip pour Canon EOS Plein Format","offer_id":44967781794077,"sku":"OPT-UHC-EOS-FF","price":161.0,"currency_code":"CAD","in_stock":true},{"title":"Clip pour Nikon Plein Format","offer_id":44967781826845,"sku":"OPT-UHC-NIKON-FF","price":161.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Optolong-UHC-2inch__75062.1612994619.1280.1280.jpg?v=1684345844"},{"product_id":"antlia-h-beta-and-oiii-visual-filter-1-25","title":"Antlia Filtre visuel H-beta et OIII - 1.25\"","description":"\u003c!-- more --\u003e\n \u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eLe filtre Antlia HB-OIII est conçu spécifiquement pour l'observation visuelle nocturne des nébuleuses à contraste élevé et l'astrophotographie du ciel profond. Sa transmission est de 90 % ou plus aux longueurs d'onde critiques (OIII 500,7 nm, OIII 495,9 nm et H-Beta 486,1 nm). Vous remarquerez une augmentation du contraste beaucoup plus élevée pour observer la nébuleuse planétaire, les restes de supernova, la nébuleuse en émission, la nébuleuse diffuse et les nébuleuses extrêmement faibles grâce au filtre Antlia HB-OIII.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eLorsqu'il est utilisé pour l'imagerie Astro Deep-sky, il améliore les détails des raies d'émission OIII et H-Beta avec des caméras astronomiques et des reflex numériques.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp data-mce-fragment=\"1\"\u003e \u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eApplication principale et performances :\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eLe filtre Antlia HB-OIII a été recouvert d'une suppression presque totale de la densité optique (OD)4 sur la longueur d'onde indésirable et la longueur d'onde de coupure du filtre est de 300 à 1 000 nm, ce qui répond aux exigences spectrales des appareils photo et améliore encore la suppression de la région IR. , par rapport aux filtres visuels avec une profondeur de coupure de OD3@350-750nm, il est plus efficace pour assombrir le fond du ciel et faciliter l'observation et la photographie du ciel profond des nébuleuses, des amas d'étoiles et des galaxies.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eLe filtre HB-OIII aide les objets faibles à devenir beaucoup plus visibles sur l'arrière-plan noirci et produit des vues quasi photographiques de la nébuleuse du Voile, de l'Haltère et d'Orion, parmi de nombreux autres objets, sous un ciel à la fois pollué par la lumière et sombre.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp data-mce-fragment=\"1\"\u003e \u003cspan data-mce-fragment=\"1\"\u003eÉtant donné que les yeux humains sont moins sensibles la nuit, des télescopes à grande ouverture sont recommandés pour recueillir la lumière et la canaliser vers les yeux de l'observateur.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45328145711389,"sku":"ANT-HB-OIII-1.25","price":141.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-Hbeta-OIII-Visual-Filter.png?v=1688578775"},{"product_id":"baader-c2-swan-band-comet-filter-15nm","title":"Baader C2 Swan-Band Comet Filter (15nm)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTargets C2 Swan Bands in comet gas tails\u003c\/li\u003e\n\u003cli\u003e15nm bandpass for high-contrast views\u003c\/li\u003e\n\u003cli\u003eO-III parallel transmission for nebula observation\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" mounted formats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eBaader C2 Swan-Band Comet Filter (15nm)\u003c\/h2\u003e\n\u003cp\u003eThe Baader C2 Swan-Band Comet Filter isolates faint cometary emissions within a narrow 15nm bandpass, dramatically increasing the contrast of gas tails against the skyglow. This specialized design targets the unique C2 Swan Bands, revealing delicate streamers and structures that are lost when using general-purpose nebula filters, and is available in both 1.25\" and 2\" mounted formats to fit any standard eyepiece or accessory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIsolating Comet Gas Tails: The 15nm C2 Swan-Band Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a comet's bright dust tail is simply reflected sunlight, its ion or gas tail glows with its own distinct light. The Baader C2 Swan-Band filter is engineered with a 15nm bandpass to isolate this specific emission from diatomic carbon (C2), which is ejected from the comet's nucleus. By blocking out interfering skyglow and light from the dust tail, the filter makes the faint, ethereal structure of the gas tail visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Dual-Purpose Filter: O-III Parallel Transmission\u003c\/h3\u003e\n\u003cp\u003eUnlike single-purpose comet filters, the Baader C2 Swan-Band filter is designed to be \"O-III parallel.\" This means its transmission window also passes the critical 501nm line from doubly-ionized oxygen (O-III), the same light emitted by planetary and other emission nebulae. This clever design allows the filter to serve a dual role in your accessory case, enhancing views of objects like the Dumbbell Nebula (M27) or the Orion Nebula (M42).\u003c\/p\u003e\n\u003cp\u003eWhile a dedicated, narrower O-III filter will provide the absolute highest contrast on nebulae, the C2 filter offers a significant boost over unfiltered views, making it a more useful tool than a filter you might only use once every few years for a bright comet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eC2 Swan-Band vs. UHC\/O-III Filters: Why Specialization Matters for Comets\u003c\/h3\u003e\n\u003cp\u003eAn observer's first instinct might be to use a standard UHC or O-III nebula filter on a comet, but this is often counterproductive. Those filters are designed to block the very wavelengths the comet's gas tail emits.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-III Filters:\u003c\/strong\u003e A typical O-III filter will completely block the C2 Swan Bands, effectively making the gas tail invisible while doing nothing to dim the dust tail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUHC \/ Broadband Filters:\u003c\/strong\u003e While better than nothing, a UHC filter's bandpass is too wide, allowing significant skyglow and light from the dust tail to pass through, which reduces contrast and hides faint detail.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Baader C2 Swan-Band filter is the correct tool for the job. It selectively passes the light from the gas tail while rejecting the light that obscures it, delivering a view that general-purpose filters cannot match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the Baader C2 Swan-Band filter do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader C2 Swan-Band filter is a narrow-band filter designed to increase the contrast of a comet's gas (ion) tail. It has a \u003cstrong\u003e15nm bandpass\u003c\/strong\u003e that selectively transmits light from diatomic carbon (C2), which is the primary emission from the gas tail, while blocking out light pollution and excessive glare from the comet's dust tail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader C2 Swan-Band filter for objects other than comets?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The filter is designed with \"O-III parallel\" transmission, meaning it also passes light from doubly-ionized oxygen. This makes it effective for enhancing contrast on many emission nebulae, particularly planetary nebulae like the Ring Nebula (M57) and larger structures like the Veil Nebula (NGC 6960).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this 15nm C2 filter compare to a standard O-III filter for viewing nebulae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA dedicated O-III filter will typically have a narrower bandpass (e.g., 7-12nm) and will provide higher contrast on O-III-rich objects. The Baader C2 filter's 15nm bandpass is wider to accommodate the Swan Bands, so while it provides a significant enhancement on nebulae, a specialized O-III filter will yield a darker sky background and more pronounced detail on those specific targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Baader C2 Swan-Band filter help me see the dust tail of a comet?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the opposite is true. The dust tail shines by reflecting sunlight, which is broadband white light. This filter is designed to \u003cstrong\u003eblock\u003c\/strong\u003e most of that light to make the faint, self-luminous gas tail stand out. It will dim the dust tail and coma significantly to improve the visibility of the ion tail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm observing a bright comet with my 10\" f\/5 Dobsonian. Will the Baader C2 filter really make a difference?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. In a 10\" telescope, a bright comet's coma and dust tail can be overwhelmingly bright, washing out the fainter gas tail. The Baader C2 filter will dim the coma and dust tail, darkening the background sky and allowing the delicate streamers, knots, and structure within the gas tail to become clearly visible. It often reveals a tail that was completely invisible without filtration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 2\" Baader C2 Swan-Band filter for imaging a planetary nebula like the Dumbbell Nebula (M27)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the filter can be used for imaging. Because it passes O-III, it can be effective for capturing detail in planetary nebulae. For serious tri-color imaging, dedicated narrowband filters (O-III, H-alpha, S-II) are superior, but for one-shot color or monochrome imaging, the C2 filter can help isolate nebular structure from a light-polluted sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e15nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Transmission\u003c\/td\u003e\n\u003ctd\u003eC2 Swan Bands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Transmission\u003c\/td\u003e\n\u003ctd\u003eO-III Parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" Mounted, 2\" Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter shape\u003c\/td\u003e\n\u003ctd\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set?\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eGas evolution of comets, O-III-paralel Imaging, Contrast Enhancement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e513 nm (for the C2 lines at 511 and 514nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003e≤ 505 – 520 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003edielectrically coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e2\" Mounted\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter size\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHBW (Halfbandwidth)\u003c\/td\u003e\n\u003ctd\u003e≤ 15nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader C2 Swan-Band Comet Filter (Selected Size)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Storage Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader_Planetarium_Filter_Problems_FAQ_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBaader Planetarium Filter Problems FAQ Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" Mounted","offer_id":51320832950557,"sku":"BAA-2961860","price":116.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":51320832983325,"sku":"BAA-2961863","price":232.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Swan-Band-Comet-Filter.jpg?v=1779478120"},{"product_id":"tele-vue-bandmate-nebustar-filter","title":"Tele Vue BandMate Nebustar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnique Narrowband Design:\u003c\/strong\u003e Transmits both Hβ and OIII emission lines in a single, targeted passband for maximum contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocks Red Wavelengths:\u003c\/strong\u003e Unlike standard UHC filters, it eliminates red light to prevent star bloat and produce sharper, natural-looking stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in Germany by Astronomik:\u003c\/strong\u003e All materials and manufacturing are German-sourced and produced by a world leader in astronomical filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividually Tested and Serialized:\u003c\/strong\u003e Every filter is optically tested by Tele Vue and spectrographically verified by Astronomik to ensure peak optical quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Application:\u003c\/strong\u003e Engineered as a superior general-purpose nebula filter for telescopes of any aperture or design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eTele Vue BandMate Nebustar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue BandMate Nebustar Filter, available in 1.25\" and 2\" formats, is a unique narrowband nebula filter that transmits key Hβ and OIII emission lines while completely blocking red wavelengths to eliminate star bloat. Manufactured in Germany for Tele Vue by Astronomik, each serialized filter passes a 5-point inspection process, including optical and spectrographic testing, to guarantee zero image degradation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHβ + OIII Transmission in 1 Filter\u003c\/h3\u003e\n\u003cp\u003eThe Nebustar's design captures the two most prominent non-red emission lines from nebulae—Oxygen-III and Hydrogen-beta—in a single, efficient passband. This dual-line transmission makes it a highly effective general-purpose tool, dramatically darkening the sky background and boosting contrast on a wide variety of targets.\u003c\/p\u003e\n\u003cp\u003eFrom the Veil Nebula (NGC 6960) to the Orion Nebula (M42), the filter reveals faint structures that are often lost to urban skyglow. It excels in telescopes of all apertures by isolating the nebula's light from the background, making faint details pop into view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 5-Point Quality Control Process for Zero Image Degradation\u003c\/h3\u003e\n\u003cp\u003eEvery BandMate Nebustar filter is held to a standard far exceeding typical production filters. Each unit is individually serialized and subjected to a comprehensive, multi-stage inspection process by both Astronomik in Germany and Tele Vue in the USA to ensure it will not alter the pristine views your telescope produces.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrographic Analysis:\u003c\/strong\u003e Astronomik verifies that the coating's transmission curve meets the exact design specification for the Hβ and OIII passband.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Testing:\u003c\/strong\u003e Tele Vue inspects each filter at high power to ensure it does not degrade image sharpness or introduce any optical aberrations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Testing:\u003c\/strong\u003e The filter housing is tested for proper threading and fit in standard 1.25\" or 2\" accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCosmetic Inspection:\u003c\/strong\u003e A detailed visual check is performed to screen for any pinholes, digs, or sleeks in the coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerialization:\u003c\/strong\u003e Each filter receives a unique serial number, creating a permanent record of its quality control passage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eNebustar vs. Standard UHC: Why Blocking Red Matters\u003c\/h3\u003e\n\u003cp\u003eThe critical distinction between the Nebustar and a traditional UHC (Ultra High Contrast) filter is its treatment of the red end of the spectrum. Standard UHC filters also pass the red Hydrogen-alpha line, which can cause bright, reddish stars to appear bloated and unnaturally colored, distracting from the nebula itself.\u003c\/p\u003e\n\u003cp\u003eBy specifically blocking all red wavelengths, the Nebustar produces a view with tighter, sharper, and more color-neutral stars. This creates a more aesthetically pleasing image where the subtle blues and greens of planetary and emission nebulae stand out against a dark background populated with pinpoint stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Tele Vue Nebustar different from a regular UHC filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is that the \u003cstrong\u003eTele Vue Nebustar blocks red wavelengths\u003c\/strong\u003e. Standard UHC filters pass red light (specifically H-alpha), which can cause bright stars to look bloated and reddish. The Nebustar's design provides enhanced nebulosity with sharper, more natural-looking stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Tele Vue Nebustar filter work well on the Orion Nebula (M42) in my 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The Nebustar is an excellent choice for the Orion Nebula (M42). It passes both the \u003cstrong\u003eHβ and OIII lines\u003c\/strong\u003e, which are strong in this object, allowing you to see fainter, intricate details in the nebula's wings and the Trapezium region while suppressing light pollution and sharpening surrounding stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue Nebustar a good filter for galaxies like Andromeda (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Nebustar is not recommended for galaxies. Galaxies are broadband objects, meaning they emit light across the entire visible spectrum. A narrowband filter like the Nebustar will block most of a galaxy's light, making it appear much dimmer. For galaxies, it's best to observe from a dark sky site without a filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does Tele Vue have Astronomik in Germany make the Nebustar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTele Vue partners with \u003cstrong\u003eAstronomik\u003c\/strong\u003e because they are a world leader in producing high-quality, dielectrically-coated astronomical filters with precise transmission characteristics. Every filter is made in Germany, then independently tested by Tele Vue in the USA to ensure it meets their rigorous standards for optical quality, guaranteeing it won't degrade the image from your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Tele Vue Nebustar filter for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for visual use, the Nebustar can be used for color imaging. However, because it blocks red light, it prevents the capture of H-alpha, which is a critical wavelength for many emission nebulae. For serious astrophotography, dedicated multi-band or single-band (H-alpha, OIII, SII) filters are generally preferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Tele Vue Nebustar perform on the Veil Nebula (NGC 6960) with a large refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Veil Nebula is a classic OIII target, and the Nebustar performs exceptionally well on it. In a refractor, the filter will make the delicate, filamentary structure of the Veil stand out dramatically against a blackened sky background. The sharp, pinpoint stars delivered by the filter will complement the high-quality optics of your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband Nebula Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePassband\u003c\/td\u003e\n\u003ctd\u003eHβ (Hydrogen-Beta) and OIII (Oxygen-III)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocked Wavelengths\u003c\/td\u003e\n\u003ctd\u003eIncludes all red wavelengths\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" (threaded for standard eyepieces\/accessories)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003eGeneral-purpose visual observation of nebulae\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAstronomik, Germany (for Tele Vue)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuality Control\u003c\/td\u003e\n\u003ctd\u003eIndividually tested (Optical, Spectrographic, Mechanical, Cosmetic) and Serialized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue BandMate Nebustar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (in selected size)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"1.25\" Mounted","offer_id":52661820653853,"sku":"TV-B2N-0125","price":204.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":52661820686621,"sku":"TV-B2N-0200","price":450.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-B2N-0200_Bandmate-Type-2-Nebustar_v1.jpg?v=1785439830"},{"product_id":"svbony-sv115-18nm-oiii-narrowband-filter","title":"SVBONY SV115 18nm OIII Narrowband Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2-inch diameter filter for standard eyepieces and accessories\u003c\/li\u003e\n\u003cli\u003e18nm bandpass isolates key Oxygen-III emission lines\u003c\/li\u003e\n\u003cli\u003e90% peak transmittance at 495.9nm and 500.7nm\u003c\/li\u003e\n\u003cli\u003eBlocks unwanted light pollution from 400-700nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV115 OIII Filter 2 inch 18nm\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV115 OIII Filter isolates nebula emissions by using an 18nm bandpass centered on the critical 495.9nm and 500.7nm Oxygen-III wavelengths. This 2-inch filter achieves 90% peak transmittance for these lines while blocking the surrounding light pollution spectrum from 400-700nm, dramatically increasing contrast for visual observation and imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIsolating Nebulae: The 18nm Oxygen-III Window\u003c\/h3\u003e\n\u003cp\u003eThis filter is engineered to pass only the light from doubly ionized oxygen, the signature emission of planetary and most emission nebulae. By rejecting nearly all other visible light across the 400-700nm spectrum, the SV115 darkens the sky background, making faint structures in objects like the Veil Nebula (NGC 6960) or the Dumbbell Nebula (M27) pop into view. The 18nm Full-Width at Half-Maximum (FWHM) is wide enough for bright visual views while still providing a significant contrast boost over broader UHC-style filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e90% Peak Transmittance for Brighter Details\u003c\/h3\u003e\n\u003cp\u003eHigh light transmission is critical, especially for a filter designed to reject most of the spectrum. The SV115's optical coatings deliver a 90% peak transmittance at the key 495.9nm and 500.7nm OIII lines, ensuring the targeted nebula signal reaches your eye or camera sensor with minimal loss. This efficiency means nebulae appear brighter and more detailed, which is particularly beneficial when observing from light-polluted locations or when using smaller aperture telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSV115 18nm OIII vs. Narrower Filters: The Visual Advantage\u003c\/h3\u003e\n\u003cp\u003eCompared to scientific-grade 7nm or 3nm OIII filters, the SV115's 18nm bandpass represents a deliberate trade-off optimized for visual use and versatile imaging. While narrower filters produce even higher contrast, they often dim the view and surrounding stars excessively, sometimes making it difficult to locate targets.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrighter Image:\u003c\/strong\u003e The 18nm window allows more photons through, resulting in a brighter, more engaging visual experience, especially in mid-size telescopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore Natural Star Fields:\u003c\/strong\u003e By not being excessively restrictive, the SV115 retains more starlight, providing a more context-rich view of the nebula within its stellar neighborhood.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLess Sensitive to Off-Band Stars:\u003c\/strong\u003e The slightly wider bandpass is more forgiving for imaging systems, reducing the appearance of halos around very bright, off-band stars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat types of celestial objects will the SVBONY SV115 18nm OIII filter improve most?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV115 OIII filter is specifically designed for \u003cstrong\u003eemission nebulae\u003c\/strong\u003e that are rich in doubly ionized oxygen. It provides the most dramatic improvement on planetary nebulae like the Ring Nebula (M57) and the Dumbbell Nebula (M27), as well as supernova remnants like the Veil Nebula (NGC 6960).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SV115 18nm OIII filter perform on the Orion Nebula (M42) from a city?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFrom a light-polluted site, the SV115 will be highly effective on the Orion Nebula (M42). It will darken the washed-out city sky, significantly boosting the contrast of the nebula's core and revealing the faint, wing-like structures that are normally invisible. The \u003cstrong\u003e18nm bandpass\u003c\/strong\u003e is an excellent compromise, cutting through skyglow while keeping the view bright enough to enjoy visually.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs an 18nm OIII filter like the SV115 good for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV115 is a capable filter for color camera astrophotography. While dedicated imagers often use narrower filters (e.g., 7nm), the \u003cstrong\u003e18nm bandpass\u003c\/strong\u003e is a great starting point for one-shot-color cameras, as it isolates the OIII signal effectively without being so restrictive that it requires extremely long sub-exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose an 18nm OIII filter over a narrower 7nm or 3nm version?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003e18nm bandpass\u003c\/strong\u003e is generally better for visual astronomy. Narrower filters can dim the view too much, making faint objects difficult to see at all. The 18nm width provides a strong contrast enhancement while maintaining a brighter image and showing more stars in the field of view, which helps with orientation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SV115 2-inch OIII filter work with my 8-inch f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. An 8-inch SCT is an excellent instrument for this filter. The 2-inch format allows you to use it with low-power, wide-field 2-inch eyepieces to frame large targets like the Veil Nebula (NGC 6960). The filter will dramatically increase contrast on these objects, which can be challenging in an SCT from suburban skies without filtration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the SVBONY SV115 OIII filter brighten nebulae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo filter can make an object brighter than it is without a filter in perfectly dark skies. Instead, the SV115 works by \u003cstrong\u003eselectively dimming the background skyglow\u003c\/strong\u003e far more than it dims the nebula. This process dramatically increases the contrast between the nebula and the sky, making the nebula much easier to see.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband OIII (Oxygen-III)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Wavelengths\u003c\/td\u003e\n\u003ctd\u003e495.9nm and 500.7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM (Bandpass)\u003c\/td\u003e\n\u003ctd\u003e18nm (±2nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmittance\u003c\/td\u003e\n\u003ctd\u003e90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Thickness\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV115 OIII Filter 2 inch 18nm\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Plastic Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"1.25\" Round Mounted","offer_id":52861235527965,"sku":"SV-F9186A","price":64.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":52861235560733,"sku":"SV-F9186B","price":78.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV115-OIII-Filter-2-inch-18nm-Reducing-Light-Polution-1_4a007e91-244a-45a6-8067-b680fa8db4dc.jpg?v=1788660107"},{"product_id":"svbony-sv132-25nm-h-beta-narrowband-filter","title":"SVBONY SV132 25nm H-Beta Narrowband Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTargets the 486nm Hydrogen-Beta emission line\u003c\/li\u003e\n\u003cli\u003e25nm bandpass for enhanced contrast\u003c\/li\u003e\n\u003cli\u003e80% peak transmittance at the H-Beta wavelength\u003c\/li\u003e\n\u003cli\u003eBlocks Mercury (Hg) and Sodium (Na) light pollution to 0.1%\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch barrel with M28.5*0.6 threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV132 H-Beta Filter 25nm 1.25inch\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV132 H-Beta Filter isolates a specific 25nm window around the 486nm H-Beta emission line, a critical tool for observing nebulae that are otherwise invisible. With 80% transmittance at its target wavelength and aggressive 0.1% blocking of common Mercury (Hg) and Sodium (Na) streetlight emissions, this 1.25-inch filter dramatically increases the contrast of famously difficult objects like the Horsehead Nebula (B33) and the California Nebula (NGC 1499).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 25nm Bandpass for Elusive Nebulae\u003c\/h3\u003e\n\u003cp\u003eCertain nebulae emit almost exclusively in the blue-green light of Hydrogen-Beta at 486nm. The SV132's 25nm FWHM (Full Width at Half Maximum) is engineered specifically for these targets. This bandpass is narrow enough to reject city glow and natural skyglow, yet wide enough to deliver a bright image in moderate to large-aperture telescopes under dark skies.\u003c\/p\u003e\n\u003cp\u003eWithout an H-Beta filter, objects like the Cocoon Nebula (IC 5146) are often completely lost against the background sky. By transmitting 80% of the nebula's specific light while dimming the surrounding stars and sky, the SV132 makes these challenging deep-sky targets achievable from your backyard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e1\/4 Wave Optics and 0.1% Light Pollution Blocking\u003c\/h3\u003e\n\u003cp\u003eThe SV132 is built on a double-side polished optical glass substrate with a surface accuracy of 1\/4 wave, ensuring it does not degrade the sharpness or clarity of your telescope's optics. Advanced coatings reject light pollution from Mercury (Hg) vapor lamps at 435nm and 578nm, and Sodium (Na) vapor lamps at 589nm, with just 0.1% transmission.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHomogeneous Coatings:\u003c\/strong\u003e A planetary rotation system during the coating process ensures uniformity across the entire filter surface, preventing hotspots or variations in the passband.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Views:\u003c\/strong\u003e By precisely blocking out the 400-700nm continuum spectrum outside the H-Beta line, the filter renders a darker sky background, making the faint structure within nebulae pop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimized Halos:\u003c\/strong\u003e The combination of a quality 1.85mm thick substrate and precise coatings eliminates distracting halos around bright stars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Specialist's Filter: When to Use the SV132 H-Beta\u003c\/h3\u003e\n\u003cp\u003eIt's critical to understand that the H-Beta filter is a specialized instrument, not a general-purpose \"nebula filter.\" While it is essential for H-Beta dominant objects, it will significantly dim or completely block the light from most other nebulae, galaxies, and star clusters which are brighter in other wavelengths like Oxygen-III or Hydrogen-Alpha.\u003c\/p\u003e\n\u003cp\u003eThe SV132's metal cell features standard M28.5*0.6 threads, making it compatible with any standard 1.25-inch eyepiece or accessory. For observers with 8-inch or larger telescopes seeking to hunt down the most elusive objects on their list, this filter is an indispensable tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat specific objects is the SVBONY SV132 H-Beta filter for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV132 H-Beta filter is designed for a select group of emission nebulae that are almost invisible without it. Its primary targets are the \u003cstrong\u003eHorsehead Nebula (Barnard 33)\u003c\/strong\u003e, the \u003cstrong\u003eCalifornia Nebula (NGC 1499)\u003c\/strong\u003e, and the \u003cstrong\u003eCocoon Nebula (IC 5146)\u003c\/strong\u003e. It can also help with parts of the Lambda Orionis cluster (Collinder 69).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SV132 H-Beta filter make the Orion Nebula (M42) look better?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it will make the Orion Nebula (M42) look significantly worse. M42 is extremely bright in Oxygen-III and Hydrogen-Alpha wavelengths, which the SV132 is designed to block. For targets like M42, M8 (the Lagoon Nebula), or M27 (the Dumbbell Nebula), a UHC or OIII filter is the correct choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the SV132 H-Beta different from a UHC or OIII filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThey target completely different wavelengths. The SV132 passes light at \u003cstrong\u003e486nm (H-Beta)\u003c\/strong\u003e. An OIII filter passes light around \u003cstrong\u003e500nm (Oxygen-III)\u003c\/strong\u003e, which is best for planetary nebulae. A UHC (Ultra High Contrast) filter has two passbands, one for H-Beta and one for OIII, making it a more general-purpose filter for most emission nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat telescope is best for the SVBONY SV132 25nm H-Beta filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter works best with moderate to large aperture telescopes, typically \u003cstrong\u003e8 inches (200mm) or larger\u003c\/strong\u003e. Because the target nebulae are inherently very faint, a larger aperture is needed to collect enough light for a satisfying view. It is most effective under dark skies, as severe light pollution can overwhelm even a narrowband filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the SVBONY SV132 have a 25nm bandpass?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e25nm bandpass (FWHM)\u003c\/strong\u003e is a balance between contrast and brightness. It is narrow enough to effectively block out most forms of light pollution and natural skyglow, which increases contrast. However, it's not so narrow that it makes the image too dim in amateur-sized telescopes, which can happen with ultra-narrow imaging filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 1.25\" SV132 H-Beta filter for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for visual use, it can be used for imaging with a color camera to enhance the H-Beta signal in certain targets. However, dedicated astrophotography filters typically have a much narrower bandpass (e.g., 3nm to 7nm) for maximum contrast and are often threaded for filter wheels or camera noses rather than eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Size\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (FWHM)\u003c\/td\u003e\n\u003ctd\u003e25±3nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter Wavelength\u003c\/td\u003e\n\u003ctd\u003e486nm (Hydrogen-Beta)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmittance\u003c\/td\u003e\n\u003ctd\u003e80% at 486nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury (Hg) Line Transmission\u003c\/td\u003e\n\u003ctd\u003e0.1% at 435nm \u0026amp; 578nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSodium (Na) Line Transmission\u003c\/td\u003e\n\u003ctd\u003e0.1% at 589nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV132 1.25\" H-Beta Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Plastic Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"1.25\" Round Mounted","offer_id":52861235659037,"sku":"SV-W9102A","price":66.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":52861235691805,"sku":"SV-W9102B","price":73.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV132-H-Beta-Filter-25nm-1-25inch-Light-Pollution-Filter-1_63fda3de-6ff9-4a65-9f77-87ce7c5656e7.jpg?v=1788660123"},{"product_id":"optolong-oiii-18nm-filter","title":"Optolong OIII 18nm Nebula Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e18nm Bandpass Centered on OIII Emission Lines (500nm)\u003c\/li\u003e\n\u003cli\u003eGreater than 80% Average Light Transmission (Tave)\u003c\/li\u003e\n\u003cli\u003eBlocks \u0026gt;99% of Major Light Pollution Lines\u003c\/li\u003e\n\u003cli\u003e1.85mm Thick Optical Glass Substrate\u003c\/li\u003e\n\u003cli\u003eλ\/4 Transmitted Wavefront and 60\/40 Surface Quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOptolong OIII 18nm Nebula Filter\u003c\/h2\u003e\n\u003cp\u003eThe Optolong OIII 18nm Nebula Filter isolates the critical 500nm emission lines from planetary nebulae and supernova remnants with its focused 18nm bandpass. By achieving over 80% average transmission at these key wavelengths while blocking more than 99% of light pollution within its 400-700nm range, this filter dramatically increases contrast. The optically flat λ\/4 wavefront ensures your telescope's resolution is preserved, delivering sharp, high-contrast views even from suburban skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIsolating Nebulae: The 18nm OIII Passband\u003c\/h3\u003e\n\u003cp\u003eThis filter is engineered to transmit a specific 18nm sliver of the blue-green spectrum, centered at 500nm. This window precisely captures the light from doubly ionized oxygen (OIII), the primary emission from targets like the Dumbbell Nebula (M27) and the Veil Nebula (NGC 6960). By isolating this light, the filter renders these faint structures visible against a darkened sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Contrast Views from Blocking \u0026gt;99% of Light Pollution\u003c\/h3\u003e\n\u003cp\u003eThe core function of the Optolong OIII filter is to improve contrast by aggressively rejecting unwanted light. It blocks over 99% of the primary wavelengths associated with mercury vapor, sodium vapor streetlights, and natural skyglow. This doesn't make the nebula brighter in absolute terms; it darkens the sky so severely that the nebula's faint details stand out in stark relief, transforming a washed-out view into a well-defined object.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision Optics: λ\/4 Wavefront and 60\/40 Surface Quality\u003c\/h3\u003e\n\u003cp\u003eA filter should only reveal detail, not degrade it. Optolong builds this filter on a 1.85mm optical glass substrate polished to a 60\/40 surface quality and a transmitted wavefront of λ\/4 or better. This level of optical precision ensures that the filter will not introduce aberrations or soften the image, preserving the sharpness delivered by your telescope's main optics. The multi-layer, ion-assisted coatings provide durability and resistance to scratching while ensuring wavelength stability regardless of temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e18nm vs. Narrower OIII Filters: The Visual Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile astrophotographers often use ultra-narrow 3nm or 7nm OIII filters, the 18nm bandpass of this Optolong filter is intentionally wider for visual astronomy. This wider window allows more photons to reach your eye, resulting in a significantly brighter and more comfortable view through the eyepiece.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrighter Image:\u003c\/strong\u003e The 18nm design prevents the image from becoming overly dim, which can happen with narrower filters, especially in telescopes under 8 inches of aperture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains Contrast:\u003c\/strong\u003e It still provides a dramatic contrast boost, making it an ideal middle ground between a broadband UHC filter and a specialized imaging filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter for More Objects:\u003c\/strong\u003e The increased brightness makes it effective on a wider range of emission nebulae, not just the very brightest planetary nebulae.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat objects work best with the Optolong 18nm OIII filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Optolong 18nm OIII filter excels on nebulae rich in ionized oxygen. It is most effective on \u003cstrong\u003eplanetary nebulae\u003c\/strong\u003e like the Ring Nebula (M57) and the Dumbbell Nebula (M27), and \u003cstrong\u003esupernova remnants\u003c\/strong\u003e such as the Veil Nebula complex (NGC 6960\/6992). It can also enhance portions of larger emission nebulae like the Lagoon Nebula (M8).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Optolong 18nm OIII filter make nebulae brighter from my city?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, a narrowband filter cannot make an object intrinsically brighter. Its purpose is to \u003cstrong\u003eincrease contrast\u003c\/strong\u003e. It works by blocking over 99% of common light pollution sources, which makes the sky background appear much darker. This allows the faint light from the nebula to stand out more clearly, making it easier to see, but the nebula's actual brightness remains unchanged.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Optolong 18nm OIII filter improve my view of the Dumbbell Nebula (M27) in my 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an 8\" Dobsonian, the Optolong 18nm OIII filter will make a dramatic difference on M27, especially from suburban skies. The sky background will darken significantly, causing the nebula's classic \"apple core\" shape to pop with well-defined edges. You may also begin to see the fainter lobes and internal structures that are often lost in the skyglow without a filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 18nm OIII filter too aggressive for viewing the Orion Nebula (M42) with a 4\" refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a very bright object like the Orion Nebula (M42), an 18nm OIII filter is an excellent choice. While M42 is bright enough to see without a filter, the OIII filter will isolate the intricate, wispy details in the nebula's core and wings, revealing structure that is normally overwhelmed by the nebula's own brightness. The 18nm bandpass is wide enough that the view in a 4\" scope will remain bright and engaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose an 18nm OIII filter instead of a narrower 7nm version for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 18nm bandpass is specifically optimized for the human eye. Narrower filters, like 7nm or 3nm versions, are designed for CCD\/CMOS sensors and can produce an image that is too dim for satisfying visual use, particularly in smaller telescopes. The 18nm filter provides a powerful contrast boost while maintaining enough image brightness for a comfortable and detailed view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Optolong 18nm OIII filter for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it is primarily designed for visual use, you can use the 18nm OIII for astrophotography, especially with one-shot color cameras from light-polluted areas. It provides a stronger signal and more natural star shapes than ultra-narrowband filters. However, for serious narrowband imaging from any location, a dedicated 7nm, 5nm, or 3nm OIII filter will provide higher contrast and better rejection of moonlight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e18nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Wavelength\u003c\/td\u003e\n\u003ctd\u003e500nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Material\u003c\/td\u003e\n\u003ctd\u003eOptical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAverage Transmission\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;80%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;99% of light pollution lines\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\u003eTransmitted Wavefront RMS\u003c\/td\u003e\n\u003ctd\u003eλ\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallelism\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" Mounted, 2\" Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOptolong OIII 18nm Nebula Filter (Selected Size)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Plastic Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/optolong-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOptolong 3-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\" Mounted","offer_id":52941926269213,"sku":"OPT-12701","price":111.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":52941926301981,"sku":"OPT-12702","price":151.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-narrowband-OIII-filter-is-designed-for-nebula-observation-allowing-18nm-bandwidth-of-light-centered-on-a-wavelength-of-500nm-through-1_d6a50468-3847-45e5-a0b6-0ecabb379087.jpg?v=1789592430"},{"product_id":"tele-vue-bandmate-oiii-filter","title":"Tele Vue BandMate OIII Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIsolates doubly ionized oxygen (OIII) emission lines\u003c\/li\u003e\n\u003cli\u003eDramatically increases contrast on planetary nebulae and supernova remnants\u003c\/li\u003e\n\u003cli\u003eManufactured by Astronomik in Germany for Tele Vue\u003c\/li\u003e\n\u003cli\u003eIndividually tested and serialized for optical quality\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" mounted formats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eTele Vue BandMate OIII Filter\u003c\/h2\u003e\n\u003cp\u003eAvailable in 1.25-inch and 2-inch formats, the Tele Vue BandMate OIII Filter isolates the critical OIII emission lines from planetary nebulae and supernova remnants, with each serialized filter undergoing rigorous German manufacturing and testing by Astronomik and Tele Vue to guarantee image integrity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOIII Narrowband: Isolating Planetary Nebulae and Supernova Remnants\u003c\/h3\u003e\n\u003cp\u003eThe BandMate OIII filter transmits a narrow band of light centered on the 501nm wavelengths emitted by doubly ionized oxygen. This is the dominant light produced by emission nebulae, particularly planetary nebulae and the delicate filaments of supernova remnants. By blocking nearly all other light, the filter dramatically darkens the sky background and boosts the contrast of these specific objects.\u003c\/p\u003e\n\u003cp\u003eTargets like the Dumbbell Nebula (M27), the Ring Nebula (M57), and the Veil Nebula (NGC 6960) transform from faint smudges into detailed structures. This filter is an essential tool for visual observers looking to pull the most detail out of these challenging deep-sky objects, especially from light-polluted locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGerman-Made Optics with Rigorous Tele Vue Testing\u003c\/h3\u003e\n\u003cp\u003eTele Vue partners with Astronomik of Germany to produce the BandMate series, ensuring a level of quality control that exceeds industry standards. Each filter undergoes a multi-stage inspection process before it is approved for sale, guaranteeing that it will not degrade the pristine images produced by Tele Vue optics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrographic Analysis:\u003c\/strong\u003e Astronomik tests each filter on a spectrograph to confirm the coating precisely matches its design specification for OIII transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Power Optical Test:\u003c\/strong\u003e Tele Vue individually tests each filter at high power to ensure it introduces no image degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical \u0026amp; Cosmetic Inspection:\u003c\/strong\u003e Every filter is checked for proper threading and fit, and examined for cosmetic flaws like pinholes or sleeks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerialization:\u003c\/strong\u003e Each filter is serialized, providing a traceable record of its quality control passage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Tele Vue BandMate OIII filter improve my view of the Veil Nebula (NGC 6960) in a 10\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 10\" scope, the Tele Vue BandMate OIII will make the faint, filamentary structure of the Veil Nebula (NGC 6960) stand out dramatically against a much darker sky background. The filter isolates the specific light emitted by the nebula, revealing intricate details that are normally washed out by skyglow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Tele Vue BandMate OIII filter to see the Ring Nebula (M57) from my light-polluted suburban backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Tele Vue BandMate OIII filter is exceptionally effective in light-polluted conditions. It blocks the wavelengths associated with common streetlights and general skyglow, while selectively passing the light from the Ring Nebula (M57). This significantly increases contrast, making the nebula's shape and central star easier to observe even from suburban skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Tele Vue BandMate OIII different from other OIII filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the rigorous, dual-company quality control. Every Tele Vue BandMate OIII is made by \u003cstrong\u003eAstronomik in Germany\u003c\/strong\u003e and then independently tested by \u003cstrong\u003eTele Vue in the USA\u003c\/strong\u003e. This includes spectrographic analysis, high-power optical testing, and cosmetic inspection, with each filter being serialized. This is how Tele Vue keeps every BandMate filter consistent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue BandMate OIII filter useful for galaxies or star clusters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is not recommended for broadband targets like galaxies and star clusters. These objects emit light across the entire visible spectrum. The Tele Vue BandMate OIII will block most of that light, making these objects extremely dim or invisible. It is a specialized filter designed specifically for emission nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich size Tele Vue BandMate OIII filter, 1.25\" or 2\", should I choose?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose the size that matches your eyepieces. If you primarily use \u003cstrong\u003e1.25\" eyepieces\u003c\/strong\u003e for high-magnification views of planetary nebulae, the 1.25\" filter is ideal. If you use \u003cstrong\u003e2\" wide-field eyepieces\u003c\/strong\u003e to view large supernova remnants like the Veil Nebula, the 2\" filter is necessary to avoid vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWho manufactures the Tele Vue BandMate OIII filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Tele Vue BandMate OIII filter is manufactured for Tele Vue by \u003cstrong\u003eAstronomik in Germany\u003c\/strong\u003e, a renowned producer of high-quality astronomical filters. All materials are sourced from Germany, and each filter is co-inspected by both companies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband, OIII (doubly ionized oxygen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAstronomik, Germany, for Tele Vue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Targets\u003c\/td\u003e\n\u003ctd\u003ePlanetary nebulae, supernova remnants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuality Control\u003c\/td\u003e\n\u003ctd\u003eOptical, spectrographic, mechanical and cosmetic testing; serialized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue BandMate OIII Filter (1.25\" or 2\", as selected)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"2\" Mounted","offer_id":53005139443997,"sku":"TV-B2O-0200","price":364.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Mounted","offer_id":53005139476765,"sku":"TV-B2O-0125","price":200.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Tele-Vue-BandMate-OIII-Filter-1_fb5ca95c-903f-4c20-afb0-fa9f523adf06.jpg?v=1790041570"},{"product_id":"tele-vue-bandmate-h-beta-filter","title":"Tele Vue BandMate H-Beta Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFilter Type: Hydrogen-Beta (Hβ) Narrowband\u003c\/li\u003e\n\u003cli\u003eAvailable Sizes: 1.25\" and 2\" Mounted\u003c\/li\u003e\n\u003cli\u003ePrimary Targets: Horsehead Nebula, California Nebula\u003c\/li\u003e\n\u003cli\u003eManufacturing: Made in Germany by Astronomik for Tele Vue\u003c\/li\u003e\n\u003cli\u003eQuality Control: Individually serialized and spectrograph-tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eTele Vue BandMate H-Beta Filter\u003c\/h2\u003e\n\u003cp\u003eAvailable in both 1.25\" and 2\" formats, the Tele Vue BandMate H-Beta Filter is a specialized narrowband filter manufactured by Astronomik in Germany to isolate the critical hydrogen-beta emission line. This filter is the key to observing notoriously difficult targets like the Horsehead Nebula (Barnard 33) and California Nebula (NGC 1499), which are very hard to see without it, even from a dark site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIsolating H-Beta: Unveiling the Horsehead \u0026amp; California Nebulae\u003c\/h3\u003e\n\u003cp\u003eThe H-Beta filter is a highly specialized tool designed for a single purpose: to pass the aqua-colored hydrogen-beta emission line common to a select few, but scientifically significant, nebulae. By aggressively blocking all other wavelengths, it dramatically increases the contrast of these faint objects, making them detectable.\u003c\/p\u003e\n\u003cp\u003eThis filter is particularly effective on large, diffuse targets that can fill the field of view of a wide-angle eyepiece. Unlike general-purpose \"light pollution\" filters, the H-Beta is an indispensable key for unlocking specific deep-sky challenges that are impossible without it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Two-Stage, Serialized Inspection Standard\u003c\/h3\u003e\n\u003cp\u003eTo meet Tele Vue's stringent requirements, every BandMate filter undergoes a rigorous, multi-stage quality control process. Each filter is produced for Tele Vue by Astronomik in Germany, using German-sourced materials, and is individually serialized to track its inspection results.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrographic Test:\u003c\/strong\u003e Astronomik tests each filter on a spectrograph to guarantee the coating's transmission curve meets the precise H-Beta specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Test:\u003c\/strong\u003e Tele Vue performs a second, independent test at high power to ensure the filter introduces no degradation to the image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical \u0026amp; Cosmetic Inspection:\u003c\/strong\u003e Each filter is inspected for mechanical fit and cosmetic defects like pinholes or sleeks, ensuring flawless build quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eH-Beta vs. OIII: Targeting Different Nebulae\u003c\/h3\u003e\n\u003cp\u003eBeginning observers often wonder whether to start with an H-Beta or an OIII filter. While both are narrowband filters, they target completely different classes of celestial objects, making them complementary tools rather than competitors.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTele Vue H-Beta Filter:\u003c\/strong\u003e This is a specialist's filter for hydrogen-emitting targets. Its primary use is for the Horsehead Nebula, California Nebula, and a few others. It is not a general-purpose nebula filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOIII Filter:\u003c\/strong\u003e An Oxygen-III filter is more versatile, enhancing contrast on a much wider variety of objects, including most planetary nebulae like the Dumbbell Nebula (M27) and supernova remnants like the Veil Nebula (NGC 6960).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor most observers, an OIII filter is the better first choice. The H-Beta is the logical next step for those specifically seeking to conquer the famous, yet challenging, targets that require it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Tele Vue BandMate H-Beta filter essential for certain nebulae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Tele Vue BandMate H-Beta filter isolates the specific 486nm wavelength of light emitted by ionized hydrogen. Objects like the \u003cstrong\u003eHorsehead Nebula\u003c\/strong\u003e and \u003cstrong\u003eCalifornia Nebula\u003c\/strong\u003e radiate strongly at this wavelength but are extremely faint visually. This filter darkens the sky background significantly, allowing the faint structure of these specific nebulae to become visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Tele Vue H-Beta filter help me see the Horsehead Nebula (Barnard 33) from my suburban backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt helps, but a suburban sky makes it very hard. The Horsehead Nebula is famously difficult even from a dark site; the H-Beta filter provides the contrast that can make it detectable there, on a dark, moonless night. For best results, use it with a larger aperture telescope (8\" or more) and a low-power, wide-field eyepiece to frame the object against the brighter nebula IC 434.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a wide-angle 2\" eyepiece. Is the Tele Vue H-Beta filter effective for the California Nebula (NGC 1499)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The California Nebula is a very large object that requires a wide true field of view to see in its entirety. The Tele Vue H-Beta filter is designed to perform well even with wide-angle eyepieces, maintaining image quality across the field while providing the critical contrast needed to trace the nebula's faint outline.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Tele Vue H-Beta filter tested by both Astronomik and Tele Vue?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis dual-testing protocol ensures uncompromising quality. \u003cstrong\u003eAstronomik\u003c\/strong\u003e, the manufacturer, uses a spectrograph to verify that the filter's transmission curve is precisely centered on the H-Beta line. \u003cstrong\u003eTele Vue\u003c\/strong\u003e then conducts its own high-power optical tests to confirm the filter will not degrade the sharp images their eyepieces and telescopes produce. Each filter is also serialized for quality tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eShould I buy a Tele Vue H-Beta filter or an OIII filter first?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most observers, an \u003cstrong\u003eOIII filter\u003c\/strong\u003e is the better first choice as it enhances a much wider range of objects, particularly planetary nebulae and supernova remnants. The \u003cstrong\u003eH-Beta filter\u003c\/strong\u003e is a more specialized tool for a limited list of targets. It is an essential second filter for dedicated observers wanting to log challenging objects like the Horsehead Nebula.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue BandMate H-Beta filter threaded for standard eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Tele Vue BandMate H-Beta filter is available in both 1.25\" and 2\" sizes, and each version is threaded to screw directly into the barrel of any standard eyepiece or accessory of the corresponding size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband, Hydrogen-beta (Hβ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAstronomik, Germany (for Tele Vue)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Targets\u003c\/td\u003e\n\u003ctd\u003eHorsehead Nebula, California Nebula, and other hydrogen-emitting nebulae\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuality Control\u003c\/td\u003e\n\u003ctd\u003eOptically, spectrographically, mechanically, and cosmetically tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerialization\u003c\/td\u003e\n\u003ctd\u003eYes, each filter is individually serialized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue BandMate H-Beta Filter (1.25\" or 2\", as selected)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"2\" Mounted","offer_id":53005139542301,"sku":"TV-B2H-0200","price":364.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Mounted","offer_id":53005139575069,"sku":"TV-B2H-0125","price":200.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Tele-Vue-BandMate-H-Beta-Filter-1_386ced24-0148-45dd-875e-9c232743e6fb.jpg?v=1790041579"}],"url":"https:\/\/davidastro.com\/fr-int\/collections\/nebula-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}