{"title":"Filtres à bande étroite Antlia 3nm Pro","description":"\u003cp\u003eLes filtres à bande étroite Antlia 3nm Pro isolent une seule raie d'émission avec une bande passante de 3nm, pour une imagerie très contrastée des nébuleuses en monochrome, même sous un ciel pollué ou une Lune brillante. La gamme couvre H-alpha, OIII et SII pour la palette SHO, plus des filtres H-bêta et NII pour des cibles spécialisées.\u003c\/p\u003e\u003cp\u003eLes versions Highspeed des filtres H-alpha, OIII et SII sont conçues pour les optiques rapides de f\/2.6 à f\/3.6, où un filtre standard se décalerait hors de la raie.\u003c\/p\u003e","products":[{"product_id":"antlia-3nm-narrowband-h-alpha-pro-filter","title":"Antlia Filtre à bande étroite H-alpha Pro de 3nm","description":"\u003cul\u003e\n\n   \u003cli\u003eLongueur d'onde centrale H-alpha de 656,3 nm\u003c\/li\u003e\n\n\u003cli\u003e Petit FHWM de 3 nm\u003c\/li\u003e\n\n\u003cli\u003e Transmission de crête élevée \u0026gt; 88 %\u003c\/li\u003e\n\n\u003cli\u003e Halos minimisés sur les étoiles brillantes\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description\u003c\/li\u003e\n\n\u003cli\u003e Caractéristiques\u003c\/li\u003e\n\n\u003cli\u003e Dans la boite\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\"\u003e\n\n\u003cp\u003e Présentation du filtre Antlia 3 nm H-Alpha Pro, le summum de la précision pour l'astrophotographie à bande étroite. Conçu pour présenter un demi-maximum pleine largeur (FWHM) de seulement 3 nm, ce filtre améliore considérablement le contraste des cibles d'émission en réduisant considérablement les signaux de fond indésirables. Conçu pour les astrophotographes souhaitant capturer des structures détaillées dans les nébuleuses, l'Antlia H-Alpha 3 nm Pro atteint une transmission impressionnante de 88 % sur la ligne hydrogène-alpha de 656,3 nm, vous garantissant de capturer le signal maximum pour des images vives et bien définies.\u003c\/p\u003e\n\n \u003cp\u003eL'Antlia 3 nm H-Alpha Pro est optimisé à la fois pour les rapports focales longs et les systèmes optiques rapides, maintenant une transmission élevée avec une perte de signal minimale, même dans des configurations aussi rapides que f\/3. Cette adaptabilité est renforcée par les données blue-shift qui confirment la compatibilité avec les systèmes à grande vitesse comme Hyperstar et RASA sans sacrifier la qualité. Son blocage hors bande exceptionnel, évalué à OD5 (0,001 %), offre un rapport signal\/bruit exceptionnel et minimise efficacement les interférences provenant d'autres longueurs d'onde, améliorant ainsi la netteté de chaque capture.\u003c\/p\u003e\n\n\u003ch3\u003e Caractéristiques\u003c\/h3\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eProfil spectral raide\u003c\/strong\u003e : minimise les halos autour des étoiles brillantes, améliorant ainsi la clarté et les détails.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eConception à substrat unique\u003c\/strong\u003e : élimine les reflets internes, garantissant des images pures et nettes.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eApplication polyvalente\u003c\/strong\u003e : idéal pour capturer les nébuleuses à émission H-alpha, les nébuleuses planétaires, les nébuleuses de Wolf-Rayet et les restes de supernova. Il fonctionne superbement dans les zones polluées par la lumière et dans les sites sombres, étendant ainsi les possibilités d'imagerie même lorsque la lune est levée.\u003c\/li\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eNoircissement des bords\u003c\/strong\u003e : tous les filtres sont noircis pour éliminer les reflets internes de la lumière parasite, améliorant ainsi la qualité de l'image.\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003ePrécision optique\u003c\/strong\u003e : Construit sur un substrat optique Schott avec une qualité de surface de 60\/40 (rayure\/creusage), un front d'onde transmis de Lambda\/4 ou mieux et un parallélisme inférieur à 30 secondes d'arc, il répond à des normes strictes en matière de performances optiques.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e Cependant, il est important de noter que le filtre Antlia 3 nm H-Alpha Pro est spécifiquement conçu pour les objets du ciel profond qui émettent dans la raie hydrogène-alpha et ne conviendra pas aux objets sans émissions H-alpha.\u003c\/p\u003e\n\n\u003cp\u003e Avec sa conception supérieure et ses avancées technologiques, le filtre Antlia 3 nm H-Alpha Pro est un outil indispensable pour les astrophotographes cherchant à repousser les limites de ce qui est visible dans le ciel nocturne. \u003c\/p\u003e\n\n\u003cdiv class=\"warning\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Clause de non-responsabilité\" width=\"25px\"\u003e\n \u003cp\u003eCe filtre ne convient pas à l'observation ou à l'imagerie solaire. Les filtres H-alpha conçus pour les applications solaires sont nettement plus étroits et spécialement conçus pour gérer la lumière intense du soleil. Tenter d'utiliser ce filtre d'astrophotographie du ciel profond pour observer ou imager le soleil peut entraîner de graves dommages à votre équipement et présenter un risque sérieux de blessure aux yeux ou de cécité. Assurez-vous toujours que vous utilisez le bon type de filtre pour l’observation solaire afin de vous protéger ainsi que votre équipement. \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ctable class=\"specifications\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Substrat de base\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Substrat optique Schott\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Épaisseur du filtre\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e 2 mm +\/-0,05 mm\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e FWHM (Pleine largeur à moitié maximum)\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e 3 nm\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e CWL (longueur d'onde centrale)\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e 656,3nmnm\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Transmission de pointe\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e ＞88%\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Blocage\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e \u0026gt; 5 OD (0,001 % de blocage hors bande) à 300-1000 nm\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Qualité de surface\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e S\/D (rayer\/creuser) = 60\/40 (voir MIL-O-13830)\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Front d'onde transmis\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Lambda\/4 ou mieux.\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Parallélisme\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Moins de 30 secondes d'arc\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Substrat\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e Simple \/ Non collé \u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Filtre\u003c\/li\u003e\n\n\u003cli\u003e Boîtier de filtre\u003c\/li\u003e\n\n\u003cli\u003e Graphique de transmission \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"1.25\" Monté","offer_id":44968069824797,"sku":"ANT-HA-3NM-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm non monté","offer_id":44968069857565,"sku":"ANT-HA-3NM-RD31","price":391.0,"currency_code":"CAD","in_stock":true},{"title":"36mm non monté","offer_id":44968069890333,"sku":"ANT-HA-3NM-RD36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44968069923101,"sku":"ANT-HA-3NM-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm non monté","offer_id":44968069955869,"sku":"ANT-HA-3NM-RD50","price":696.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-Ha-Pro__26276.1670360748.1280.1280.jpg?v=1770824812"},{"product_id":"antlia-3nm-narrowband-oiii-pro-filter","title":"Antlia Filtre à bande étroite OIII Pro de 3nm","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cspan\u003eLe filtre à bande étroite Antlia OIII Pro optimise le FWHM (pleine largeur moitié maximum) à 3 nm\u003c\/span\u003e\u003cins cite=\"mailto:Ted%20Dobosz\" datetime=\"2021-01-06T13:06\"\u003e \u003c\/ins\u003e\u003cspan\u003epasse-bande\u003c\/span\u003e \u003cspan\u003e.\u003c\/span\u003e \u003cspan\u003eAu fur et à mesure que la bande passante se rétrécit, les filtres à bande étroite 3 nm Pro améliorent le contraste des cibles d'émission en réduisant le signal de fond indésirable.\u003c\/span\u003e \u003cspan\u003eFiltres\u003c\/span\u003e \u003cspan\u003eAntlia\u003c\/span\u003e \u003cspan\u003eOIII\u003c\/span\u003e \u003cspan\u003e3nm Pro\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003esont\u003c\/span\u003e \u003cspan\u003econçus pour fournir\u003c\/span\u003e une transmission \u003cspan\u003ede 85\u003c\/span\u003e \u003cspan\u003e% sur la ligne de 500,7 nm, ce qui vous fournit le signal maximal et des structures de nébuleuses bien définies.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eLes filtres à bande étroite conventionnels plus larges entraînent une forte perte de transmission en raison de la forte longueur d'onde centrale (CWL)\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003edécalage\u003c\/span\u003e \u003cspan\u003e.\u003c\/span\u003e \u003cspan\u003eNous garantissons T\u0026gt;\u003c\/span\u003e \u003cspan\u003e85\u003c\/span\u003e \u003cspan\u003e% dans la plage de 1 nm de la bande passante centrale, ce qui signifie que le filtre à bande étroite Pro 3 nm peut garantir une transmission élevée pour travailler avec des rapports de focale longs et des systèmes optiques rapides.\u003c\/span\u003e \u003cspan\u003eBleu\u003c\/span\u003e \u003cspan\u003e_\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003eles données de décalage montrent que les filtres Antlia 3nm Pro peuvent être utilisés avec presque tous les systèmes aussi rapidement que f\/3 avec un minimum\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003eperte de signal d'émission et répond aux exigences des optiques rapides comme Hyperstar et RASA.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eLa spécification de blocage hors bande est notée OD\u003c\/span\u003e \u003cspan\u003e5\u003c\/span\u003e \u003cspan\u003e(0.\u003c\/span\u003e \u003cspan\u003e00\u003c\/span\u003e \u003cspan\u003e1%) qui offre un excellent\u003c\/span\u003e \u003cspan\u003eSNR (\u003c\/span\u003e \u003cspan\u003erapport signal sur bruit\u003c\/span\u003e \u003cspan\u003e)\u003c\/span\u003e \u003cspan\u003eet une coupure efficace\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003ehors débit pour minimiser les interférences provenant d'autres longueurs d'onde.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003eCoupe nette améliorée\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003eLes filtres astrophotographie 3nm Pro sont conçus pour minimiser les halos autour des étoiles brillantes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eApplications et performances :\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eHaute transmittance et plus petite bande passante\u003c\/span\u003e \u003cspan\u003epour maximiser\u003c\/span\u003e \u003cspan\u003ele contraste\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eLe profil spectral raide minimise les halos autour des étoiles brillantes\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUn substrat unique pour éliminer les réflexions internes\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eObjets à bande étroite : nébuleuses à émission OIII, planètes, nébuleuses Wolf Rayet et restes de supernova\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUtilisation dans les zones légèrement polluées et les sites sombres\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eÉtendre\u003c\/span\u003e \u003cspan\u003es\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003etemps d'imagerie lorsque la lune est levée\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eLes filtres Pro à bande étroite Antlia peuvent être utilisés\u003c\/span\u003e \u003cspan\u003ejusqu'aux\u003c\/span\u003e \u003cspan\u003esystèmes\u003c\/span\u003e \u003cspan\u003eF\/3\u003c\/span\u003e \u003cspan\u003eavec une légère perte de signal\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eTous les filtres à bande étroite A\u003c\/span\u003e \u003cspan\u003entlia\u003c\/span\u003e \u003cspan\u003esont noircis pour\u003c\/span\u003e \u003cspan\u003eéliminer les reflets internes\u003c\/span\u003e \u003cspan\u003ede la lumière parasite\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUne fiabilité optique supérieure réduit\u003c\/span\u003e \u003cspan\u003ele post-traitement de l'image\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eCe filtre n'est pas adapté aux objets du ciel profond qui ne contiennent pas d'émissions OIII.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eSpécifications techniques\u003c\/span\u003e \u003cspan\u003e:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eSubstrat de base :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003esubstrat optique\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eEpaisseur du filtre :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003e2mm+\/-0.05mm pour\u003c\/span\u003e \u003cspan\u003e2''\u003c\/span\u003e \u003cspan\u003emonté\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eFWHM (pleine largeur à mi-hauteur) :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003e3 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eCWL (longueur d'onde centrale)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e : 500,7 nm\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTransmission maximale :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003e\u0026gt; 85 %\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eBlocage :\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u0026gt; 5 OD (0,001 % de blocage hors bande) à 300-1 000 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eQualité de surface :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003eS\/D (rayures\/creusées)= 60\/40 (Se référer à MIL-O-13830)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eFront d'onde transmis :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003eLambda\/4 ou mieux.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eParallélisme :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003emoins de 30 secondes d'arc\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eSubstrat simple \/ non collé\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eGarantie : 3 ans contre le délaminage\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Monté","offer_id":44968070054173,"sku":"ANT-OIII-3NM-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm non monté","offer_id":44968070086941,"sku":"ANT-OIII-3NM-RD31","price":391.0,"currency_code":"CAD","in_stock":true},{"title":"36mm non monté","offer_id":44968070119709,"sku":"ANT-OIII-3NM-RD36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44968070152477,"sku":"ANT-OIII-3NM-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm non monté","offer_id":44968070185245,"sku":"ANT-OIII-3NM-RD50","price":696.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-OIII-Pro__82794.1670360959.1280.1280.jpg?v=1684348664"},{"product_id":"antlia-3nm-narrowband-sii-pro-filter","title":"Antlia Filtre à bande étroite SII Pro de 3nm","description":"\u003c!-- more --\u003e \u003cp\u003eLe filtre à bande étroite \u003cspan\u003eAntlia\u003c\/span\u003e \u003cspan\u003eSII\u003c\/span\u003e \u003cspan\u003ePro optimise le FWHM (pleine largeur moitié maximum) à une bande passante de 3 nm. Au fur et à mesure que la bande passante se rétrécit, les\u003c\/span\u003e filtres \u003cspan\u003eà bande étroite\u003c\/span\u003e \u003cspan\u003e3 nm\u003c\/span\u003e \u003cspan\u003ePro\u003c\/span\u003e \u003cspan\u003eaméliorent le contraste des cibles d'émission en réduisant le signal de fond indésirable.\u003c\/span\u003e Le filtre \u003cspan\u003eAntlia SII\u003c\/span\u003e \u003cspan\u003e3 nm Pro\u003c\/span\u003e \u003cspan\u003eest conçu pour fournir une transmission de 88 % sur la ligne 671,6 nm,\u003c\/span\u003e \u003cspan\u003ece qui\u003c\/span\u003e \u003cspan\u003evous fournit le signal maximal et des structures de nébuleuses bien définies\u003c\/span\u003e \u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eLes filtres à bande étroite conventionnels plus larges entraînent une forte perte de transmission en raison du fort décalage de la longueur d'onde centrale (CWL)\u003c\/span\u003e \u003cspan\u003e.\u003c\/span\u003e \u003cspan\u003eNous garantissons T\u0026gt; 88 % dans une plage de 1 nm de la bande passante centrale\u003c\/span\u003e \u003cspan\u003e,\u003c\/span\u003e \u003cspan\u003ece qui signifie que le filtre à bande étroite Pro 3 nm peut garantir une transmission élevée pour\u003c\/span\u003e fonctionnant à \u003cspan\u003ela\u003c\/span\u003e \u003cspan\u003efois\u003c\/span\u003e \u003cspan\u003eavec des rapports de focale longs et des systèmes optiques\u003c\/span\u003e \u003cspan\u003erapides\u003c\/span\u003e \u003cspan\u003e.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e \u003cspan\u003eet répond aux exigences des optiques rapides comme Hyperstar et RASA.\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eLa spécification de blocage hors bande est notée OD\u003c\/span\u003e \u003cspan\u003e5\u003c\/span\u003e \u003cspan\u003e(0,\u003c\/span\u003e \u003cspan\u003e00\u003c\/span\u003e \u003cspan\u003e1%) qui offre un excellent\u003c\/span\u003e \u003cspan\u003eSNR (\u003c\/span\u003e \u003cspan\u003erapport signal sur bruit\u003c\/span\u003e \u003cspan\u003e)\u003c\/span\u003e \u003cspan\u003eet un taux de coupure efficace pour minimiser les interférences provenant d'autres longueurs d'onde.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e Les filtres astrophotographie 3nm Pro \u003cspan\u003eaméliorés\u003c\/span\u003e \u003cspan\u003eà coupure nette\u003c\/span\u003e \u003cspan\u003esont conçus pour minimiser les halos autour des étoiles brillantes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eApplications et performances :\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eHaute transmittance et plus petite bande passante\u003c\/span\u003e \u003cspan\u003epour maximiser\u003c\/span\u003e \u003cspan\u003ele contraste\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eLe profil spectral raide minimise les halos autour des étoiles brillantes\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUn substrat unique pour éliminer les réflexions internes\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eObjets à bande étroite : nébuleuses à émission SII, planètes, nébuleuses Wolf-Rayet et restes de supernova\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUtilisation dans les zones légèrement polluées et les sites sombres\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eProlonger le temps d'imagerie lorsque la lune est levée\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cspan\u003eTous les filtres Pro à bande étroite Antlia peuvent être utilisés\u003c\/span\u003e \u003cspan\u003ejusqu'à\u003c\/span\u003e \u003cspan\u003eF\/3 avec une légère perte de signal\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eTous les filtres à bande étroite Antlia sont noircis pour éliminer les reflets internes de la lumière parasite\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eUne fiabilité optique supérieure réduit le post-traitement de l'image\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eCe filtre n'est pas adapté aux objets du ciel profond qui ne contiennent pas\u003c\/span\u003e d'émissions \u003cspan\u003eSII\u003c\/span\u003e \u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eSpécifications techniques\u003c\/span\u003e \u003cspan\u003e:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eSubstrat de base :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003eSubstrat optique Schott\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eÉpaisseur du filtre :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003e2\u003c\/span\u003e \u003cspan\u003emm +\/- 0,05 mm pour Dia36 mm non monté\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eFWHM (pleine largeur à mi-hauteur) :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003e3 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eCWL (longueur d'onde centrale)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e : 671,6 nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eTransmission maximale :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003e\u0026gt; 88 %\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eBlocage :\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e \u0026gt; 5 OD (0,001 % de blocage hors bande) à 300-1 000 nm\u003c\/span\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003e\u003cspan\u003eQualité de surface :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003eS\/D (rayures\/creusées)= 60\/40 (Se référer à MIL-O-13830)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eFront d'onde transmis :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003eLambda\/4 ou mieux.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eParallélisme :\u003c\/span\u003e\u003c\/strong\u003e \u003cspan\u003emoins de 30 secondes d'arc\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eSubstrat simple \/ non collé\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eGarantie : 3 ans contre le délaminage\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Monté","offer_id":44968070218013,"sku":"ANT-SII-3NM-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm non monté","offer_id":44968070250781,"sku":"ANT-SII-3NM-RD31","price":391.0,"currency_code":"CAD","in_stock":true},{"title":"36mm non monté","offer_id":44968070283549,"sku":"ANT-SII-3NM-RD36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44968070316317,"sku":"ANT-SII-3NM-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm non monté","offer_id":44968070349085,"sku":"ANT-SII-3NM-RD50","price":696.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-SII-Pro__65220.1670361127.1280.1280.jpg?v=1684348641"},{"product_id":"antlia-3nm-narrowband-h-alpha-pro-highspeed-filter","title":"Antlia 3nm Narrowband H-alpha Pro Highspeed Filter - f\/2.6 to f\/3.6","description":"\u003cul\u003e\n\u003cli\u003ePre-shifted 656.3nm H-alpha Central Wavelength for High-Speed Systems\u003c\/li\u003e\n\u003cli\u003eOptimized 3nm FHWM for f\/2.6–f\/3.6\u003c\/li\u003e\n\u003cli\u003eHigh \u0026gt;90% Peak Transmission\u003c\/li\u003e\n\u003cli\u003eEnhanced SNR for Fast Optical Systems\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm H-Alpha Pro Highspeed Filter, specifically engineered for ultra-fast optical systems. This enhanced version is pre-shifted to compensate for the natural blue shift that occurs in fast focal ratio telescopes. By offsetting the central wavelength toward the red end of the spectrum, the filter maintains optimal signal capture in systems operating between f\/2.6 and f\/3.6, delivering significantly improved signal-to-noise ratio compared to standard 3nm filters.\u003c\/p\u003e\n\u003cp\u003eIn high-speed imaging systems, the converging light cone increases the angle of incidence (AOI), causing interference filters to shift toward shorter wavelengths. At f\/2.6, this shift can reach up to 2.2nm. The Antlia 3nm Pro Highspeed filter is precisely pre-shifted by 1.2nm to counteract this effect, ensuring maximum transmission at the critical 656.3nm hydrogen-alpha emission line during real-world use. With peak transmission exceeding 90% and a true 3nm bandwidth, this filter maximizes contrast while preserving faint nebular detail.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Shifted Spectral Design\u003c\/strong\u003e: Compensates for blue shift in fast systems, maintaining optimal signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Optimization\u003c\/strong\u003e: Designed specifically for focal ratios between f\/2.6 and f\/3.6 with minimal signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Sharp Cut-Off\u003c\/strong\u003e: Advanced coating design minimizes halos around bright stars while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Blocking\u003c\/strong\u003e: OD5 (0.001%) out-of-band blocking across 300–1000nm ensures excellent signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Construction\u003c\/strong\u003e: Non-glued optical substrate eliminates internal reflections for cleaner images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for imaging emission nebulae, planetary nebulae, Wolf-Rayet nebulae, and supernova remnants in both light-polluted and dark-sky locations. Extends productive imaging time even under moonlit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All unmounted Highspeed filters feature blackened edges to suppress stray light reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Manufactured with strict quality standards to reduce post-processing and enhance reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that the Antlia 3nm H-Alpha Pro Highspeed filter is specifically optimized for fast focal ratio systems. While it can function in slower systems, it is purpose-built to deliver maximum performance in high-speed optical configurations.\u003c\/p\u003e\n\u003cp\u003eFor astrophotographers using RASA, Hyperstar, and other fast imaging platforms, the Antlia 3nm H-Alpha Pro Highspeed Filter provides the precision engineering required to fully exploit the capabilities of modern ultra-fast telescopes.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. H-alpha filters designed for solar applications are significantly narrower and specifically engineered to handle the intense light from the sun. Attempting to use this deep sky astrophotography filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e657.5nm (Pre-shifted for high-speed systems)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD (0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":50935097098525,"sku":"ANT-HA-3NM-HS-1.25","price":375.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":50935097131293,"sku":"ANT-HA-3NM-HS-RD31","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":50935097164061,"sku":"ANT-HA-3NM-HS-RD36","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":50935097196829,"sku":"ANT-HA-3NM-HS-2","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":50935097229597,"sku":"ANT-HA-3NM-HS-RD50","price":721.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-Ha-Pro__26276.1670360748.1280.1280.jpg?v=1770824812"},{"product_id":"antlia-3nm-narrowband-oiii-pro-highspeed-filter-f-2-6-to-f-3-6","title":"Antlia 3nm Narrowband OIII Pro Highspeed Filter - f\/2.6 to f\/3.6","description":"\u003cul\u003e\n  \u003cli\u003ePre-shifted 500.7nm OIII Central Wavelength for High-Speed Systems\u003c\/li\u003e\n  \u003cli\u003eOptimized 3nm FHWM for f\/2.6–f\/3.6\u003c\/li\u003e\n  \u003cli\u003eHigh \u0026gt;90% Peak Transmission\u003c\/li\u003e\n  \u003cli\u003eEnhanced SNR for Fast Optical Systems\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm OIII Pro Highspeed Filter, specifically engineered for ultra-fast optical systems. This enhanced version is pre-shifted to compensate for the natural blue shift that occurs in fast focal ratio telescopes. By offsetting the central wavelength toward the red end of the spectrum, the filter maintains optimal signal capture in systems operating between f\/2.6 and f\/3.6, delivering significantly improved signal-to-noise ratio compared to standard 3nm filters.\u003c\/p\u003e\n\u003cp\u003eIn high-speed imaging systems, the converging light cone increases the angle of incidence (AOI), causing interference filters to shift toward shorter wavelengths. At f\/2.6, this shift can reach up to 2.2nm. The Antlia 3nm Pro Highspeed filter is precisely pre-shifted to counteract this effect, ensuring maximum transmission at the critical 500.7nm oxygen-III emission line during real-world use. With peak transmission exceeding 90% and a true 3nm bandwidth, this filter maximizes contrast while preserving delicate nebular structures.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Shifted Spectral Design\u003c\/strong\u003e: Compensates for blue shift in fast systems, maintaining optimal signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Optimization\u003c\/strong\u003e: Designed specifically for focal ratios between f\/2.6 and f\/3.6 with minimal signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Sharp Cut-Off\u003c\/strong\u003e: Advanced coating design minimizes halos around bright stars while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Blocking\u003c\/strong\u003e: OD5 (0.001%) out-of-band blocking across 300–1000nm ensures excellent signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Construction\u003c\/strong\u003e: Non-glued optical substrate eliminates internal reflections for cleaner images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for imaging planetary nebulae, supernova remnants, and emission nebulae rich in OIII signal in both light-polluted and dark-sky locations. Extends productive imaging time even under moonlit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All unmounted Highspeed filters feature blackened edges to suppress stray light reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Manufactured with strict quality standards to reduce post-processing and enhance reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that the Antlia 3nm OIII Pro Highspeed filter is specifically optimized for fast focal ratio systems. While it can function in slower systems, it is purpose-built to deliver maximum performance in high-speed optical configurations.\u003c\/p\u003e\n\u003cp\u003eFor astrophotographers using RASA, Hyperstar, and other fast imaging platforms, the Antlia 3nm OIII Pro Highspeed Filter provides the precision engineering required to fully exploit the capabilities of modern ultra-fast telescopes.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. OIII filters designed for deep sky applications are not engineered to handle the intense light from the sun. Attempting to use this filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ePre-shifted for 500.7nm OIII (optimized for high-speed systems)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD (0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":50935159292189,"sku":"ANT-OIII-3NM-HS-1.25","price":375.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":50935159324957,"sku":"ANT-OIII-3NM-HS-RD31","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":50935159357725,"sku":"ANT-OIII-3NM-HS-RD36","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":50935159390493,"sku":"ANT-OIII-3NM-HS-2","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":50935159423261,"sku":"ANT-OIII-3NM-HS-RD50","price":721.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"},{"product_id":"antlia-3nm-narrowband-sii-pro-highspeed-filter-f-2-6-to-f-3-6","title":"Antlia 3nm Narrowband SII Pro Highspeed Filter - f\/2.6 to f\/3.6","description":"\u003cul\u003e\n  \u003cli\u003ePre-shifted 500.7nm OIII Central Wavelength for High-Speed Systems\u003c\/li\u003e\n  \u003cli\u003eOptimized 3nm FHWM for f\/2.6–f\/3.6\u003c\/li\u003e\n  \u003cli\u003eHigh \u0026gt;90% Peak Transmission\u003c\/li\u003e\n  \u003cli\u003eEnhanced SNR for Fast Optical Systems\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm OIII Pro Highspeed Filter, specifically engineered for ultra-fast optical systems. This enhanced version is pre-shifted to compensate for the natural blue shift that occurs in fast focal ratio telescopes. By offsetting the central wavelength toward the red end of the spectrum, the filter maintains optimal signal capture in systems operating between f\/2.6 and f\/3.6, delivering significantly improved signal-to-noise ratio compared to standard 3nm filters.\u003c\/p\u003e\n\u003cp\u003eIn high-speed imaging systems, the converging light cone increases the angle of incidence (AOI), causing interference filters to shift toward shorter wavelengths. At f\/2.6, this shift can reach up to 2.2nm. The Antlia 3nm Pro Highspeed filter is precisely pre-shifted to counteract this effect, ensuring maximum transmission at the critical 500.7nm oxygen-III emission line during real-world use. With peak transmission exceeding 90% and a true 3nm bandwidth, this filter maximizes contrast while preserving delicate nebular structures.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Shifted Spectral Design\u003c\/strong\u003e: Compensates for blue shift in fast systems, maintaining optimal signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Optimization\u003c\/strong\u003e: Designed specifically for focal ratios between f\/2.6 and f\/3.6 with minimal signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Sharp Cut-Off\u003c\/strong\u003e: Advanced coating design minimizes halos around bright stars while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Blocking\u003c\/strong\u003e: OD5 (0.001%) out-of-band blocking across 300–1000nm ensures excellent signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Construction\u003c\/strong\u003e: Non-glued optical substrate eliminates internal reflections for cleaner images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for imaging planetary nebulae, supernova remnants, and emission nebulae rich in OIII signal in both light-polluted and dark-sky locations. Extends productive imaging time even under moonlit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All unmounted Highspeed filters feature blackened edges to suppress stray light reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Manufactured with strict quality standards to reduce post-processing and enhance reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that the Antlia 3nm OIII Pro Highspeed filter is specifically optimized for fast focal ratio systems. While it can function in slower systems, it is purpose-built to deliver maximum performance in high-speed optical configurations.\u003c\/p\u003e\n\u003cp\u003eFor astrophotographers using RASA, Hyperstar, and other fast imaging platforms, the Antlia 3nm OIII Pro Highspeed Filter provides the precision engineering required to fully exploit the capabilities of modern ultra-fast telescopes.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. OIII filters designed for deep sky applications are not engineered to handle the intense light from the sun. Attempting to use this filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ePre-shifted for 500.7nm OIII (optimized for high-speed systems)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD (0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":50935297147165,"sku":"ANT-SII-3NM-HS-1.25","price":375.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":50935297179933,"sku":"ANT-SII-3NM-HS-RD31","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":50935297212701,"sku":"ANT-SII-3NM-HS-RD36","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":50935297245469,"sku":"ANT-SII-3NM-HS-2","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":50935297278237,"sku":"ANT-SII-3NM-HS-RD50","price":721.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/antlia-3nm-pro-narrowband-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}