{"title":"Filtres d'observation","description":"\u003cdiv\u003e\n  \u003cp\u003e\n    Visual filters are designed for the eye rather than a sensor, and the difference matters. Human night vision is most sensitive around 500 nm, so a visual nebula filter is tuned to pass what your dark-adapted eye can actually detect, while an imaging filter is tuned to what silicon records. David Astro carries visual filters in Canada, held in Canadian stock.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    Aperture determines how much filtering you can afford to lose light to. Tell us your telescope and targets and we will recommend accordingly.\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- more --\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eFilters Designed for the Eye\u003c\/h2\u003e\n  \u003cp\u003e\n    A visual filter must balance contrast gain against absolute brightness, because the eye needs a certain amount of light before it detects anything at all.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eScotopic sensitivity:\u003c\/strong\u003e Dark-adapted vision peaks near 500 nm, close to the OIII emission line, which is why OIII filters have such a dramatic visual effect on planetary nebulae.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUHC-type filters:\u003c\/strong\u003e Pass the main nebula emission lines together, giving broad contrast gain with less light loss than a single-line filter.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAperture and brightness trade:\u003c\/strong\u003e The narrower the filter, the more aperture you need behind it. An OIII filter in a small telescope leaves very little to see.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBroadband filters:\u003c\/strong\u003e Milder light pollution rejection that keeps star fields looking natural, appropriate for clusters and galaxies where narrow filters do not help.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBarrel sizes:\u003c\/strong\u003e 1.25 inch and 2 inch, matched to your eyepiece set and diagonal.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDifference from imaging filters:\u003c\/strong\u003e Imaging narrowband filters are far narrower and would leave a visual observer with almost nothing to see.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eWhy Choose David Astro for Visual Filters\u003c\/h2\u003e\n  \u003cp\u003e\n    A filter that suits a sensor may show you nothing at the eyepiece, and vice versa.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVisual and imaging distinguished clearly:\u003c\/strong\u003e We will not sell you a 3 nm imaging filter for visual observing, because at the eyepiece it removes almost all the light.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAperture matched:\u003c\/strong\u003e We recommend filter strength against your telescope's aperture, since narrow filters need light behind them.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTarget honesty:\u003c\/strong\u003e Galaxies and clusters gain nothing from nebula filters, and we will say so rather than sell one anyway.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAuthorized dealer:\u003c\/strong\u003e Genuine filters with verified coatings and manufacturer warranty, in Canadian stock.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShips from Canada:\u003c\/strong\u003e No duties or brokerage fees for Canadian buyers.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eVisual Filters in Canada — Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003e\u003cstrong\u003eCan I use imaging filters visually?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eTechnically yes, practically no. Imaging narrowband filters are far too narrow for the eye and leave almost nothing visible. Visual filters are deliberately wider for this reason.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eWhich filter first?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eA UHC-type filter. It improves the widest range of emission targets and dims the view less than an OIII, which matters below about 10 inches of aperture.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eWhy do OIII filters work so well visually?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eBecause the OIII line at 500.7 nm sits very close to the peak sensitivity of dark-adapted human vision, so the light it passes is the light your eye detects best.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eWill a filter help me see galaxies?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eNo. Galaxy light is broadband, so a filter removes it along with the skyglow. Dark skies and aperture are the only things that help with galaxies.\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eImproving contrast at the eyepiece?\u003c\/h2\u003e\n  \u003cp\u003eTell us your aperture and targets and we will recommend a filter. Held in Canada, shipped fast.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"celestron-moon-filter-set-1-25","title":"Celestron Ensemble de Filtres Moon - 1.25\"","description":"\u003c!-- more --\u003e\u003ch2\u003e Caractéristiques\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eQuatre excellents filtres lunaires dans un seul kit - tout ce dont vous aurez besoin pour une vue optimale de la surface lunaire\u003c\/li\u003e\n\n\u003cli\u003eTrois filtres à densité neutre (ND) avec différents niveaux de transmission de la lumière (13 %, 25 % et 50 %) vous permettent de choisir le filtre parfait pour vos conditions d'observation\u003c\/li\u003e\n\n\u003cli\u003eLe filtre Moon \u0026amp; Sky Glow offre des vues à contraste élevé de la surface lunaire et améliore l'observation des objets du ciel profond à partir d'un ciel légèrement pollué\u003c\/li\u003e\n\n\u003cli\u003eLes cellules filtrantes en aluminium fournissent un boîtier rigide et durable pour le verre filtrant et sont filetées en haut et en bas pour l'empilage\u003c\/li\u003e\n\n \u003cli\u003eLe kit comprend un étui de transport en plastique avec carte de la lune et légende pour identifier les caractéristiques lunaires les plus populaires.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eEnsemble de filtres Celestron Moon, 1,25\"\u003c\/h2\u003e\n\u003cp\u003e Notre Lune est l'objet le plus populaire à observer avec un télescope. C'est une cible évidente, facile à localiser et pleine de caractéristiques géographiques passionnantes à explorer. Les filtres lunaires améliorent la vision lunaire en réduisant l'éblouissement lumineux de la Lune, en améliorant le contraste et en facilitant l'observation des détails faibles. Les astronomes amateurs qualifient les filtres lunaires de \"lunettes de soleil pour la lune\" car ils offrent une vue plus confortable et réduisent la fatigue oculaire.\u003c\/p\u003e\n\u003cp\u003e Cet ensemble de filtres lunaires contient tous les filtres dont vous aurez besoin pour observer la Lune au cours de ses différentes phases. L'ensemble vous permet de choisir le meilleur filtre à utiliser avec différentes combinaisons d'oculaires et de télescopes. Utilisez le filtre le plus sombre avec des télescopes à plus grande ouverture et des oculaires à faible grossissement. Utilisez les filtres plus légers avec des télescopes plus petits et des oculaires à grossissement plus élevé.\u003c\/p\u003e \u003cp\u003eCe kit est essentiel pour ceux qui cherchent à passer à l'étape suivante dans l'exploration de la pleine capacité lunaire de leur télescope, ou pour les observateurs lunaires chevronnés qui utilisent une variété de télescopes et d'oculaires pour observer la Lune.\u003c\/p\u003e\n\u003cp\u003e Dans ce kit, vous recevrez :\u003c\/p\u003e\n\u003cul\u003e\n\n \u003cli\u003e\n\n\u003cstrong\u003eTrois filtres à densité neutre (ND) : ND96-0,9 13 % T, ND96-0,6 25 % T et ND96-0,3 50 % T —\u003c\/strong\u003e Ces filtres atténuent de manière égale l'ensemble du spectre visuel de 400 à 700 nm. Le filtre ND96-0.9 transmet 13 % de la lumière entrante, le ND96-0.6 transmet 25 % et le ND96-0.3 transmet 50 %. Ils ne donnent aucune couleur à la Lune, mais réduisent la luminosité lunaire. Avec plusieurs filtres ND au choix, vous pouvez trouver le bon niveau de transmission lumineuse pour la Lune en fonction de sa phase, de l'ouverture de votre télescope et du grossissement de votre oculaire. Les filtres ND peuvent également être utilisés pour réduire l'éblouissement de Vénus afin de mieux voir ses phases de croissant et pour aider à assombrir les vues diurnes lumineuses lors de l'utilisation d'un télescope terrestre.\u003c\/li\u003e\n\n \u003cli\u003e\n\n\u003cstrong\u003eUn filtre Moon \u0026amp; Sky Glow -\u003c\/strong\u003e Ce filtre réduit sélectivement la transmission de la lumière à différentes longueurs d'onde et améliore considérablement le contraste pour l'observation des caractéristiques lunaires subtiles. Ce filtre donne une couleur violette très claire à la Lune. Pour ceux qui vivent dans un ciel pollué par la lumière, le filtre Moon \u0026amp; Sky Glow améliore le contraste lors de la visualisation d'objets du ciel profond car le filtre bloque certaines longueurs d'onde associées aux formes courantes de pollution lumineuse, par exemple les lampadaires au sodium basse pression (LPS). Voici le graphique de transmission pour le filtre Moon \u0026amp; Sky Glow :\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/Graph_large.jpg?v=1559258503\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eUn étui de transport en plastique durable -\u003c\/strong\u003e L'ensemble de filtres Moon est livré avec un étui en plastique doublé de mousse pour ranger les quatre filtres lorsqu'ils ne sont pas utilisés et les protéger pendant le transport.\u003c\/li\u003e\n\n \u003cli\u003e\n\n\u003cstrong\u003eCarte et légende de la Lune -\u003c\/strong\u003e Familiarisez-vous avec la Lune, notre monde voisin, à l'aide de notre carte portable de la Lune. La carte de la Lune est accompagnée d'une légende mettant en évidence 17 caractéristiques clés à explorer, notamment la mer de la tranquillité, Tycho, Platon, Copernic et bien d'autres.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eLogement\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e Chaque filtre est logé dans une cellule en aluminium, fournissant un cadre rigide et durable pour le verre filtrant. Les filtres s'enfilent sur les oculaires Celestron 1,25\" et la plupart des autres oculaires 1,25\" avec un filetage de filtre standard. Les filtres ont des filetages en haut et en bas pour s'empiler avec d'autres filtres pour encore plus d'options de filtration légère.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e \u003cstrong\u003eExplorer la Lune\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eVotre ensemble de filtres lunaires comprend également un téléchargement gratuit du \u003cspan\u003e\u003ca href=\"https:\/\/www.celestron.com\/blogs\/celestron-in-the-community\/lunar-landscapes-the-photography-of-robert-reeves\"\u003elivre électronique de Robert Reeves, Paysages lunaires\u003c\/a\u003e ,\u003c\/span\u003e qui donne des détails fascinants sur la taille des cratères, la formation des marias, l'histoire naturelle de la Lune, et plus encore.\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\u003ctable\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTaille du filtre :\u003c\/td\u003e\n\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLogement de cellule :\u003c\/td\u003e\n\n\u003ctd\u003eAluminium\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFils de filtre empilables :\u003c\/td\u003e\n\n\u003ctd\u003eOui\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePoids du filtre individuel : \u003c\/td\u003e\n\n\u003ctd\u003e0,21 oz (6 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre 1 :\u003c\/td\u003e\n\n\u003ctd\u003eND96-0.9 13% de transmission lumineuse\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre 2 :\u003c\/td\u003e\n\n\u003ctd\u003eND96-0.6 25% de transmission lumineuse\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre 3 :\u003c\/td\u003e\n\n\u003ctd\u003eND96-0.3 50% de transmission lumineuse\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre 4 :\u003c\/td\u003e\n\n\u003ctd\u003eMoon and Sky Glow, violet clair\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePoids total avec filtres et boîtier\u003c\/td\u003e\n\n\u003ctd\u003e2,61 oz (74 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e \u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967145603357,"sku":"CEL-94315","price":83.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Celestron-Moon-Filter-Set-1-25-inch-94315-1__78612.1594229182.1280.1280.jpg?v=1684337125"},{"product_id":"celestron-lunar-and-planetary-filter-set-1-25","title":"Celestron Ensemble de Filtres Lunaires et Planétaires - 1.25\"","description":"\u003c!-- more --\u003e\u003ch2\u003e Caractéristiques\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eUn joli jeu de filtres planétaires de 1,25\" pour débutants pour n'importe quel télescope.\u003c\/li\u003e\n\n\u003cli\u003eDécouvrez les caractéristiques de la Lune et des planètes sous un tout nouveau jour.\u003c\/li\u003e\n\n\u003cli\u003eLa cellule en aluminium est filetée en haut et en bas pour l'empilage.\u003c\/li\u003e\n\n\u003cli\u003eComprend Wratten #12 Deep Yellow, #21 Orange, #80A Light Blue et un filtre à densité neutre #ND-96-0.3 avec 50% de transmission.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eEnsemble de filtres lunaires et planétaires Celestron, 1,25\"\u003c\/h2\u003e \u003cp\u003eDes filtres colorés peuvent être utilisés pour faire ressortir des détails sur la surface d'une planète ou sa structure nuageuse. Tous les filtres planétaires inclus dans l'ensemble de filtres lunaires et planétaires Celestron peuvent être utilisés sur n'importe quel oculaire de 1,25\" avec les filetages de filtre appropriés, ils sont donc très polyvalents. Vissez-en un sur l'oculaire de votre choix et faites-le glisser dans le porte-oculaire.\u003c\/p\u003e\n\u003cp\u003e Cet ensemble de filtres Celestron comprend les couleurs suivantes :\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e12 Deep Yellow - Un bon filtre à usage général pour les télescopes à petite ouverture (moins de 4,5\"), le #12 Yellow améliorera le contraste des caractéristiques sur la Lune. Il vous aidera également à voir les ceintures équatoriales sur Jupiter et Saturne, les nuages ​​et les calottes glaciaires polaires sur Mars et les détails sombres sur Uranus et Neptune.\u003c\/li\u003e\n\n\u003cli\u003e21 Orange - Renforce les frontières le long des plaines de Mars en raison de la réduction des transmissions bleu\/vert. Utilisez sur Jupiter et Saturne pour améliorer les détails dans les ceintures et les régions polaires.\u003c\/li\u003e\n\n \u003cli\u003e80A Bleu - Améliore le contraste des ceintures nuageuses sur Jupiter et des calottes glaciaires polaires sur Saturne. Il peut également être utilisé pour augmenter le contraste sur la Lune si le changement de couleur ne vous dérange pas.\u003c\/li\u003e\n\n\u003cli\u003eDensité neutre ND-96-0.3 - Un excellent filtre pour la Lune et à empiler avec d'autres filtres planétaires pour augmenter la densité sans changer la couleur. Un filtre de densité neutre est également utile lors de la séparation de systèmes d'étoiles binaires (étoiles doubles). Utilisez chaque fois que vous souhaitez réduire la luminosité sans affecter les caractéristiques de couleur d'un objet.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e \u003cp\u003eChaque filtre Celestron 1,25 \"a une ouverture claire de 26 mm et est monté dans une cellule en aluminium anodisé noir qui est filetée des deux côtés. Les doubles filetages permettent à l'utilisateur d'empiler différents filtres ensemble pour créer une couleur personnalisée ou affecter le pourcentage de transmission. Revêtements spéciaux sur chaque filtre protège contre les reflets, les images fantômes et les rayures Un étui en plastique est inclus pour garder vos filtres en sécurité lorsqu'ils ne sont pas utilisés.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149207837,"sku":"CEL-94119-10","price":76.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Lunar-and-Planetary-Filter-Set-1-25-inch-94119-10-1__26681.1594230264.1280.1280.jpg?v=1684337236"},{"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":"celestron-moon-filter-1-25","title":"Celestron Filtre Lunaire - 1.25\"","description":"\u003c!-- more --\u003e\u003ch2\u003e Caractéristiques\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eRéduisez l'éblouissement et augmentez le contraste de la Lune avec le filtre lunaire Celestron 1,25\"\u003c\/li\u003e\n\n\u003cli\u003eÉgalement utile pour les planètes très brillantes ainsi que pour l'observation terrestre sur le sable ou la neige\u003c\/li\u003e\n\n\u003cli\u003eS'enfile sur la plupart des oculaires de 1,25\" en quelques secondes\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eFiltre lunaire Celestron 1,25\"\u003c\/h2\u003e \u003cp\u003eLa Lune a la particularité d'être l'objet céleste le plus souvent vu à travers les télescopes d'arrière-cour. C'est sans aucun doute beau et mystérieux, et c'est l'une de ces constantes dans nos vies qui nous relie à tous les autres êtres de notre planète. Peu importe qui nous sommes, où nous vivons ou voyageons, nous regardons tous la même lune.\u003c\/p\u003e \u003cp\u003eIl est difficile de regarder la Lune à travers un télescope et de voir tous les détails en raison de sa luminosité. Nos yeux ne sont pas prêts pour le faisceau de lumière brillant émis par l'oculaire, et ils \"s'arrêtent\", tout comme ils le feraient lorsque vous sortez au soleil par une belle journée d'été. Lorsque nous sommes au soleil, nous portent souvent des lunettes de soleil. Elles nous aident à détendre nos yeux, nous protègent de l'éblouissement et nous aident à voir les choses plus clairement. Lorsque les astronomes amateurs observent la Lune, nous utilisons un filtre lunaire. Un filtre lunaire Celestron offre des avantages similaires à ceux des lunettes de soleil. .notre œil se détend et s'ouvre pour nous permettre de voir plus de détails, ce qui est particulièrement important lorsque l'on observe la Lune lorsqu'elle est presque pleine.\u003c\/p\u003e \u003cp\u003eLe filtre lunaire Celestron se visse simplement sur le canon d'insertion de la plupart des oculaires de 1,25\". Il ne faut qu'une seconde ou deux pour transformer votre oculaire ordinaire en un oculaire adapté aux observations lunaires. Un filtre lunaire est également utile lors de l'observation de Vénus ou de scènes terrestres lumineuses. filtre n'est pas adapté à la visualisation du Soleil.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149502749,"sku":"CEL-94119-A","price":18.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-1-25-inch-Moon-Filter-94119-A-1__47885.1594231057.1280.1280.jpg?v=1684337244"},{"product_id":"celestron-neutral-density-moon-filter-1-25","title":"Celestron Filtre Lunaire à Densité Neutre - 1.25\"","description":"\u003c!-- more --\u003e\u003ch2\u003e Caractéristiques\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eRéduit la luminosité et réduit l'éblouissement, augmentant la clarté de la Lune, de Vénus et des étoiles doubles brillantes\u003c\/li\u003e\n\n\u003cli\u003e13% de transmission lumineuse\u003c\/li\u003e\n\n\u003cli\u003eFournit une image en vraie couleur\u003c\/li\u003e\n\n\u003cli\u003eS'enfile sur n'importe quel oculaire Celestron 1,25\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eFiltre lunaire à densité neutre Celestron - 1,25\"\u003c\/h2\u003e \u003cp\u003eLe filtre lunaire à densité neutre se fixe à un oculaire de 1,25\" pour réduire la quantité de lumière entrant dans l'oculaire de 87 %. La Lune est l'un des objets les plus visibles dans le ciel, mais vous ne devriez pas être privé de ses caractéristiques en raison de la luminosité. . Ce filtre ne permet qu'à 13 % de la lumière du télescope d'atteindre l'oculaire, ce qui le rend beaucoup plus confortable à voir. Contrairement aux filtres de couleur, le filtre Neutral Density Moon affecte toutes les couleurs du spectre visible de manière uniforme, assombrissant l'image sans changer la couleur Certains filtres Moon sont des filtres verts #58, et bien qu'ils fonctionnent bien pour réduire l'éblouissement, ils ajoutent également une teinte verte non naturelle à la surface de la Lune. Le filtre Lune à densité neutre donne une image en vraie couleur.\u003c\/p\u003e \u003cp\u003eCe filtre est également idéal pour aider à réduire l'éblouissement et à augmenter le contraste lors de la visualisation de planètes brillantes comme Vénus ou Jupiter, ou même pour assombrir les étoiles brillantes lors de la séparation d'étoiles doubles proches. Le filtre est en verre avec une cellule en aluminium qui se fixe aux oculaires de 1,25\" et est fileté des deux côtés pour pouvoir être empilé avec des filtres de couleur.\u003c\/p\u003e\n\u003cdiv data-custom-tab\u003e\n\n\u003cp data-custom-tab-title\u003eCaractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDiamètre de la taille\u003c\/td\u003e\n\n\u003ctd\u003e31,75 mm (1,25\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLogement de cellule\u003c\/td\u003e\n\n\u003ctd\u003eBoîtier de cellule en aluminium\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre empilable\u003c\/td\u003e\n\n\u003ctd\u003eOui\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTransmission lumineuse\u003c\/td\u003e\n\n \u003ctd\u003e13%\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions Filtre uniquement\u003c\/td\u003e\n\n\u003ctd\u003e31 mm x 11,5 mm (1,22\" x 0,45\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions Boîtier uniquement\u003c\/td\u003e\n\n\u003ctd\u003e54,5 mm x 43 mm x 18 mm (2,14\" x 1,7\" x 0,7\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions Conditionnement\u003c\/td\u003e\n\n\u003ctd\u003e60 mm x 50 mm x 23 mm (2,36\" x 2\" x 0,9\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre de poids uniquement\u003c\/td\u003e\n\n\u003ctd\u003e0,21 oz (6 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBoîtier de poids uniquement\u003c\/td\u003e\n\n\u003ctd\u003e0,5 oz (14 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003ctd\u003ePoids total du colis\u003c\/td\u003e\n\n\u003ctd\u003e0,88 oz (25 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149568285,"sku":"CEL-94105","price":28.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Neutral-Density-Moon-Filter-1-25-inch-94105-1__04155.1594230267.1280.1280.jpg?v=1684337250"},{"product_id":"celestron-variable-polarizing-filter-1-25","title":"Celestron Filtre Polarisant Variable - 1.25\"","description":"\u003c!-- more --\u003e\u003ch2\u003eCaractéristiques\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eUn moyen personnalisable de réduire la luminosité et l'éblouissement sur les objets célestes les plus brillants comme la Lune, Vénus et les étoiles doubles brillantes\u003c\/li\u003e\n\n\u003cli\u003eAjustez le niveau de transmission de la lumière de 1 à 40 % pour obtenir la meilleure vue possible pour votre cible spécifique et les conditions de visualisation actuelles\u003c\/li\u003e\n\n\u003cli\u003eSimple à utiliser : il suffit de tourner la bague inférieure du filtre pour régler la luminosité.\u003c\/li\u003e\n\n\u003cli\u003eSe visse sur n'importe quel oculaire Celestron 1,25\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eFiltre polarisant variable Celestron - 1,25\"\u003c\/h2\u003e \u003cp\u003eLorsque vous souhaitez réduire de manière sélective la luminosité des objets célestes pour une vue personnalisée, le filtre polarisant variable est le choix parfait. Contrairement aux filtres lunaires et aux filtres à densité neutre classiques, le niveau de luminosité peut être réduit à seulement 1 % ou jusqu'à 40 %. Pour effectuer le réglage, tournez simplement la bague inférieure du filtre et l'image devient plus lumineuse ou plus sombre.\u003c\/p\u003e\n\u003cp\u003e Ce filtre ne modifie pas la couleur de l'objet que vous observez, ce qui en fait un excellent choix pour l'astroimagerie, en particulier lors de l'imagerie de la surface de la Lune. En réduisant la luminosité, les détails lunaires deviennent plus prononcés et définis. Ce filtre peut également être utilisé pour assombrir le fond de ciel bleu lors de la recherche de planètes comme Vénus ou Jupiter à la lumière du jour, faisant ressortir la planète de l'arrière-plan.\u003c\/p\u003e\n\u003cp\u003e Le filtre polarisant variable se visse sur n'importe quel oculaire Celestron de 1,25\". Enfin, le filtre peut être fileté des deux côtés afin que vous puissiez l'empiler avec d'autres filtres, tels que la couleur ou la densité neutre, si nécessaire.\u003c\/p\u003e \u003cdiv data-custom-tab\u003e\n\n\u003cp data-custom-tab-title\u003eCaractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDiamètre de la taille\u003c\/td\u003e\n\n\u003ctd\u003e31,75 mm (1,25\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLogement de cellule\u003c\/td\u003e\n\n\u003ctd\u003eBoîtier de cellule en aluminium\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre empilable\u003c\/td\u003e\n\n\u003ctd\u003eOui\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTransmission lumineuse\u003c\/td\u003e\n\n\u003ctd\u003eRéglable pour petits et grands télescopes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions Filtre uniquement\u003c\/td\u003e\n\n\u003ctd\u003e31,4 mm x 22,4 mm (1,23\" x 0,88\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003ctd\u003eDimensions Boîtier uniquement\u003c\/td\u003e\n\n\u003ctd\u003e68 mm x 28 mm (2,67\" x 1,1\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions Conditionnement\u003c\/td\u003e\n\n\u003ctd\u003e72 mm x 71 mm x 33 mm (2,83\" x 2,8\" x 1,3\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFiltre de poids uniquement\u003c\/td\u003e\n\n\u003ctd\u003e0,56 oz (16 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBoîtier de poids uniquement\u003c\/td\u003e\n\n\u003ctd\u003e0,91 oz (26 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePoids total du colis\u003c\/td\u003e\n\n\u003ctd\u003e1,7 oz (50 g)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967149601053,"sku":"CEL-94107","price":60.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Variable-Polarizing-Filter-1-25-inch-94107-1__57811.1594229204.1280.1280.jpg?v=1684337258"},{"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":"explore-scientific-neutral-density-filter-nd-0-9-1-25","title":"Explore Scientific Filtre à Densité Neutre ND 0.9 - 1.25\"","description":"\u003c!-- more --\u003e Explore Scientific Filtre à densité neutre ND 0,9 - 1,25\"","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967202816285,"sku":"ES-310245","price":69.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-Neutral-Density-Filter-1-25-inch-ND-0-9-310245-1__86920.1594240363.1280.1280.jpg?v=1684338909"},{"product_id":"chroma-jovian-methane-filter","title":"Chroma Filtre Jovian Methane","description":"\u003c!-- more --\u003e\u003cp\u003e Filtre à bande d'absorption du méthane. Ce filtre améliore le contraste lors de l'imagerie d'objets contenant des niveaux importants de méthane. Les composants riches en méthane, comme dans l'atmosphère des planètes joviennes, apparaîtront plus sombres.\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eFiltres conçus pour être utilisés avec CCD et pour f\/4.0 ou moins\u003c\/li\u003e\n\n\u003cli\u003ePas de reflets entraînant des distorsions d'image ou des \"réflexions arrière\"\u003c\/li\u003e\n\n\u003cli\u003eFront d'onde transmis supérieur à 0,25 onde\/pouce\u003c\/li\u003e\n\n\u003cli\u003eRevêtements de pulvérisation durables\u003c\/li\u003e\n\n \u003cli\u003eParallélisme : \u0026lt; 30 secondes d'arc\u003c\/li\u003e\n\n\u003cli\u003eÉpaisseur : 3,0 +\/-0,05 mm\u003c\/li\u003e\n\n\u003cli\u003eLes revêtements extrêmement durables résistent aux changements d'humidité et aux flux de température extrêmes et restent spectralement précis\u003c\/li\u003e\n\n\u003cli\u003een adhérence CWL et passe-bande\u003c\/li\u003e\n\n\u003cli\u003eCapable de fabriquer de grands filtres pour de grands détecteurs : 50 mm x 50 mm, 65 mm jusqu'à 76,2 mm et carré de 101,6 mm\u003c\/li\u003e\n\n\u003cli\u003eTous les filtres fabriqués au Vermont\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eChroma fabrique des filtres d'astronomie de la plus haute qualité avec des revêtements durs pulvérisés durables utilisant des substrats uniques du meilleur verre, éliminant ainsi le besoin de stratifications. Tous les revêtements de filtre primaires sont appliqués sur la surface avant et les revêtements anti-reflets sur la surface arrière pour éviter les images fantômes et maximiser la transmission.\u003c\/p\u003e \u003cp\u003eTrès précis et exacts, les bandes passantes de ces filtres restent spectralement stables et ne dérivent pas en réponse aux fluctuations extrêmes de température ou aux changements d'humidité. Tous les filtres peuvent être utilisés avec des ouvertures de f\/4 ou moins. Ils fournissent des services de revêtement personnalisés pour les applications d'imagerie plus exigeantes nécessitant des ouvertures plus grandes telles que f\/3 ou f\/2. Ils peuvent également fournir des tailles plus grandes et des bandes passantes uniques sur demande.\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967248363805,"sku":"CT-27012-1.25M","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm rond non monté","offer_id":44967248396573,"sku":"CT-27012-31D","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm rond non monté","offer_id":44967248429341,"sku":"CT-27012-36D","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967248462109,"sku":"CT-27012-2M","price":707.0,"currency_code":"CAD","in_stock":true},{"title":"50mm rond non monté","offer_id":44967248494877,"sku":"CT-27012-50D","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Carré Non Monté","offer_id":44967248527645,"sku":"CT-27012-50X50","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Transmission-Curve-of-Chroma-Jovian-Methane-Filter__29695.1596071520.1280.1280.jpg?v=1684339724"},{"product_id":"baader-methane-filter-889nm-8nm-1-25","title":"Baader Filtre Méthane 889nm - 8nm 1.25\"","description":"\u003c!-- more --\u003e \u003cul\u003e\n\n\u003cli\u003eSubstrat Schott RG 830 avec revêtement diélectrique super empilé\u003c\/li\u003e\n\n\u003cli\u003ePour la transmission pure de la bande de méthane, l'imagerie planétaire\u003c\/li\u003e\n\n\u003cli\u003eBords de revêtement scellés anti-vieillissement\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv data-custom-tab\u003e\n\n\u003cp data-custom-tab-title\u003eCaractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\u003ctable\u003e\n\n\u003ccolgroup\u003e\n\n\u003ccol width=\"25%\"\u003e\n\n\u003ccol\u003e\n\n\n\u003c\/colgroup\u003e\n\n\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\u003e2458295\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825023285\u003c\/td\u003e\n\n \u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,06\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\u003eméthane\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\u003e8nm\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\u003e889 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 \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\u003eCCD, Planétaire, Spécialité\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 \u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967357776157,"sku":"BAA-2458295","price":348.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Methane-Filter-889nm-8nm-1-25-inch-1__14885.1597110939.1280.1280.jpg?v=1684341026"},{"product_id":"baader-contrast-booster-filter","title":"Baader Filtre Contrast-Booster","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cspan\u003ePour l'observation solaire, utilisez uniquement en combinaison avec le film de sécurité Baader AstroSolar !\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n \u003cli\u003eÉlimine l'erreur de couleur des réfracteurs économiques.\u003c\/li\u003e\n\n\u003cli\u003eAffiche clairement la qualité réelle de l'objectif.\u003c\/li\u003e\n\n\u003cli\u003eSupprime la \"teinte\" bleuâtre (=manque de contraste) lors de l'observation lunaire, planétaire, solaire et terrestre.\u003c\/li\u003e\n\n\u003cli\u003eAccentue fortement les détails de surface sur Jupiter et Mars. Si vous n'avez jamais vu le GRS (Great Red Spot) sur Jupiter - avec ce filtre, vous le ferez.\u003c\/li\u003e\n\n\u003cli\u003ePlus de 95 % de transmission - fournit une image lumineuse et brillante par rapport aux filtres de couleur vert foncé habituels, utilisés pour faire ressortir les détails sur Jupiter. La définition des couleurs est conservée.\u003c\/li\u003e\n\n\u003cli\u003eLe nec plus ultra des filtres lunaires. La Lune (et le Soleil) apparaissent de couleur beaucoup plus naturelle (avec une légère teinte jaunâtre), par rapport aux filtres lunaires vert foncé à bas prix habituels, généralement proposés pour les télescopes débutants.\u003c\/li\u003e\n\n \u003cli\u003eSupprime complètement les fausses couleurs gênantes et les détails d'image maculés et délavés qui en résultent. Vous n'avez jamais vu la Lune ou le Soleil (avec le film de sécurité AstroSolar) aussi net dans un télescope achromatique économique.\u003c\/li\u003e\n\n\u003cli\u003eBloque la \"lumière parasite\" atmosphérique (skyglow). Le fond du ciel se transforme en noir absolu.\u003c\/li\u003e\n\n\u003cli\u003eS'adapte aux filetages de filtre standard de 1¼\" et 2\". Planéoptiquement poli, adapté pour être utilisé devant une visionneuse binoculaire, ou pour une projection d'image a-focale lors d'une imagerie numérique (bien devant le plan focal).\u003c\/li\u003e\n\n\u003cli\u003eAucune détérioration de la résolution avec des grossissements de 200x et plus - comme avec le verre \"brut poli\" (poli à la flamme).\u003c\/li\u003e\n\n\u003cli\u003eSubstrat (verre en fusion) Verre dopé au néodyme.\u003c\/li\u003e\n\n\u003cli\u003eRevêtement \/ face arrière : revêtement multicouche dur 7 couches, avec 0,25 % de réflexion.\u003c\/li\u003e\n\n\u003cli\u003eRevêtement \/ face avant : bloqueur passe-long diélectrique 23 couches. \u003c\/li\u003e\n\n\u003cli\u003eRevêtements durcis par faisceau d'ions sur les deux faces, absolument résistants aux rayures - peuvent être nettoyés à tout moment sans crainte. Bords de revêtement scellés anti-vieillissement\u003c\/li\u003e\n\n\u003cli\u003eUne partie importante de la pollution lumineuse de la ville, ainsi que de l'Airglow atmosphérique, est supprimée de l'image télescopique.\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"\/fr-int\/pages\/why-baader-planetarium-filters\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePourquoi les filtres de planétarium Baader ?\u003c\/a\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e \u003cp\u003eBien plus qu'un simple filtre moins violet. Basé sur le populaire filtre Baader Moon \u0026amp; Skyglow, le Baader Contrast-Booster prend l'amélioration du contraste et la réduction du skyglow au niveau maximum possible à partir d'un filtre. Non seulement ce filtre offre une amélioration significative des contrastes planétaires et lunaires, mais il est également conçu pour éliminer totalement la brume bleue défocalisée dommageable présente dans les réfracteurs achromatiques. Fini le halo bleu ennuyeux et la brume obscurcissante qui entourent et maculent la résolution et le contraste. Les contrastes subtils et les couleurs sont amplifiés, tout en affichant la pleine résolution dont votre lunette est capable.\u003c\/p\u003e \u003cp\u003eLe Contrast-Booster combine une fusion spéciale exclusive de verre au néodyme avec un bloqueur passe-long diélectrique à 23 couches soigneusement conçu sur une face et un revêtement antireflet ultra-faible à 7 couches sur l'autre face. En filtrant agressivement les longueurs d'onde bleues défocalisées, une teinte jaune clair est conférée aux objets (nettement moins qu'un filtre jaune typique). Les revêtements spéciaux permettent une transmission de plus de 95 % sur les parties clés du spectre visible (y compris H-Alpha). Il en résulte un filtre qui conserve les couleurs et les contrastes de couleurs des sujets difficiles comme Jupiter, sans atténuation excessive de l'image. Les bandes nuageuses conservent leurs teintes rouges vermillon, mais deviennent maintenant plus frappantes en contraste. La Grande Tache Rouge devient enfin plus facile. Les planètes et les paysages lunaires se détachent sur un ciel noir de jais. Le Contrast-Booster est un must pour l'observation solaire (avec Baader Astro Solar).\u003c\/p\u003e \u003cp\u003eComme de nombreux utilisateurs l'ont trouvé, il s'agit d'un excellent filtre pour Mars ! Les vues de Mars avec tous les télescopes (y compris les réflecteurs et les apochromates) bénéficient de la filtration RVB et du blocage du bleu.\u003c\/p\u003e \u003cp\u003eCombiné avec le filtre Baader UV-IR-Cut, le Contrast-Booster constitue le filtre idéal pour l'imagerie numérique. Plutôt que d'ajouter le coût d'une filtration IR supplémentaire (uniquement nécessaire pour l'imagerie numérique), le Baader Contrast Booster a été optimisé pour une utilisation visuelle. Les imageurs numériques peuvent simplement ajouter notre filtre Baader UV-IR-Cut en cas de besoin. Les véritables surfaces finement polies 1\/4 d'onde garantissent la netteté et le contraste de l'image. Les filtres sont disponibles dans les tailles 1¼\" et 2\". Le substrat de base est une fusion spéciale de verre dopé au néodyme, conçu pour des caractéristiques de transmission spécifiques et fabriqué uniquement pour le planétarium Baader. En plus de ses caractéristiques spectrales uniques, le Contrast-Booster offre les caractéristiques optiques et mécaniques caractéristiques de Baader qui le distinguent et se traduisent par la meilleure netteté d'image, le contraste et la durabilité dans le monde réel ;\u003c\/p\u003e \u003cp\u003e\u003cem\u003e\"Le filtre amplificateur de contraste supprime certainement la lueur violette de mon réfracteur 6\" f\/8 à la fois sur les étoiles brillantes et sur la lune. Cela donne une teinte jaune \"chaude\" aux deux. Je me suis vite habitué à cela lors de l'observation de la lune et cela n'a posé aucun problème. J'ai essayé sur Mars. Malheureusement, je suis trop au nord (+53deg) pour échapper aux pires effets de l'atmosphère terrestre et voir varié de passable à terrible. Pourtant, cela rendait les marques sombres plus clairement visibles. La qualité du verre est superbe. Certains autres filtres que j'ai utilisés provoquent un adoucissement des détails; pas ainsi avec le Baader. Dans l'ensemble, un ajout très utile à mes outils d'observation ; et à un très bon prix.\"\u003c\/em\u003e \u003cstrong\u003ePat Abbott\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cem\u003e\"Je voulais juste vous faire savoir que le filtre Baader Contrast Booster est un EXCELLENT produit. De loin le meilleur filtre que j'ai utilisé sur Mars. J'attends avec impatience Jupiter et Saturne. Cela m'a aussi vraiment aidé avec l'imagerie de ma webcam de Mars.\"\u003c\/em\u003e \u003cstrong\u003eGordon Dayton\u003c\/strong\u003e \u003c\/p\u003e\n\u003ca href=\"#transmission-curve_0-1\" id=\"st-link-transmission-curve_0-1\" class=\"station-tabs-link\" role=\"tab\" aria-controls=\"st-transmission-curve_0-1\" aria-selected=\"false\" tabindex=\"-1\"\u003e\u003cspan\u003eCourbe de transmission\u003c\/span\u003e\u003c\/a\u003e\u003cdiv\u003e\n\n\u003cp\u003e\u003cimg alt=\"source=\" https:\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTransmissionskurve La ligne de transmission de Baader Contrast Booster\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg alt=\"source=\" https:\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTransmissionskurve mit UV\/IR Sperrfilter La ligne de transmission de Baader Contrast Booster, combinée avec le filtre de coupure UV\/IR pour CCD Astronomy\u003c\/strong\u003e\u003c\/p\u003e\n\n \u003cp\u003eLa courbe de transmission montre la transmission de la lumière en pourcentage par rapport à la longueur d'onde de la lumière en nanomètres. Notez la transmission élevée pour les observations visuelles de H-alpha (98%), H-beta (87%) et OIII (82%). Dans une ville polluée par la lumière, les lampadaires à vapeur de mercure et de sodium émettent à 435 nm et entre 570 et 590 nm. Ici, la transmission du filtre est comprise entre 0,3 et 3 %. Avec le filtre de coupure UV \/ IR Baader, Baader Contrast Booster est en outre un filtre optimal pour les images CCD des grandes villes et des zones métropolitaines polluées par la lumière (voir la deuxième courbe de filtre).\u003c\/p\u003e\n\n\n\u003c\/div\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\u003e2458360\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009517\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\u003eplusieurs bandes (voir image spectrale)\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\u003e1 millimètre\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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, Correction des couleurs, IR-Cut, 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\u003ePasse-bande\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\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\u003e2458365\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009500\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,067\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\u003eplusieurs bandes (voir image spectrale)\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\u003e1 millimètre\u003c\/td\u003e\n\n \u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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, Correction des couleurs, IR-Cut, 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\u003ePasse-bande\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\n\u003c\/div\u003e\n\n\n\u003c\/div\u003eSUPPORTZ\u003cp\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_contrast_booster.pdf?v=1684340670?v=1590139276\" target=\"_blank\"\u003eBooster de contraste Baader\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_testreview_baader_anti_fringing_filters_astronomy_technology_today.pdf?v=1684340675?v=1590139318\" target=\"_blank\"\u003eRevue de test - Filtres anti-fringing Baader - Astronomy Technology Today\u003c\/a\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967360135453,"sku":"BAA-2458360","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967360168221,"sku":"BAA-2458365","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Contrast-Booster-Filter-1__53178.1597110973.1280.1280.jpg?v=1684341355"},{"product_id":"baader-individual-color-filter-dark-blue-bright-blue-green-yellow-red-orange","title":"Baader Filtre de Couleur Individuel - Bleu Foncé, Bleu Vif, Vert, Jaune, Rouge, Orange","description":"\u003c!-- more --\u003e \u003cp\u003e\u003cstrong\u003e\"Moins est plus!\" Mieux vaut quelques filtres à hautes performances optiques produits pour les observations astronomiques que des montagnes entières de filtres de qualité médiocre.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\u003cspan\u003eEnsemble de filtres de couleur avec 6 couleurs pour l'amélioration du contraste des observations lunaires et planétaires.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003eFiltres inclus : filtre bleu foncé, filtre bleu clair, filtre vert, filtre jaune, filtre orange et filtre rouge\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003eLa plus grande ouverture libre de tous les filtres de couleur du marché pour éliminer tout vignettage.\u003c\/li\u003e\n\n\u003cli\u003eLa \"couronne de préhension\" usinée CNC offre une excellente maniabilité et un excellent confort.\u003c\/li\u003e\n\n\u003cli\u003eRevêtement AR à 7 couches des deux côtés avec seulement 0,25 % de réflexion résiduelle par surface. Il s'agit du revêtement le plus antireflet jamais réalisé avec des filtres de couleur.\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003eRevêtement scellé non vieillissant\u003c\/span\u003e\u003c\/li\u003e\n\n \u003cli\u003eLe critère le plus important pour tout type de filtrage de la lumière est la luminosité. Certaines plages spectrales à fort grossissement ne fonctionneront qu'à la transmission lumineuse la plus élevée.\u003c\/li\u003e\n\n\u003cli\u003eLe filtre passe-haut de cet ensemble de filtres offre une transmission de 98 % et ne produit aucune lumière parasite. Inégalé par d'autres marques. Cela se voit facilement par rapport aux filtres de couleur standard - les couleurs du filtre sont beaucoup plus éclatantes\u003c\/li\u003e\n\n\u003cli\u003eLa combinaison de notre filtre de coupure infrarouge (IR) 1¼\" et du filtre rouge RG 610 donne un filtre passe-haut à bande extrêmement étroite pour la photographie CCD des nébuleuses à émission rouge - à un prix ridiculement bas !\u003c\/li\u003e\n\n\u003cli\u003eUne large gamme d'adaptateurs permet l'utilisation de fils photo T-2 (Voir : Baader Astro T-2 System™).\u003c\/li\u003e\n\n\n\u003c\/ul\u003e \u003cp\u003ePas seulement un autre filtre coloré. Enfin, un ensemble d'outils sérieux pour l'observateur planétaire. Les filtres colorés Premium de Baader Planetarium apportent un nouveau niveau de qualité et de performance à l'amélioration du contraste planétaire. Disponible seul ou en ensemble complet de 6 filtres dans les tailles 1¼\" et 2\".\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e Liberté des images fantômes, même lorsqu'elles sont empilées. Les substrats sans stries sont polis parallèlement à 30 secondes pour éviter les erreurs de coin. Les multicouches dures à 7 couches les plus fines sur les deux faces présentent 0,25 % de réflexions résiduelles (les filtres Baader sont uniques, aucun autre filtre coloré n'intègre de multicouches antireflet). Les revêtements sont également différents pour chacun des filtres, afin d'adapter les performances du revêtement à la courbe de filtre de chaque couleur. Cela maximise la transmission et minimise les réflexions.\u003cbr\u003e \u003cbr\u003eLes transmissions extrêmement élevées se traduisent par un contraste et une isolation maximum des détails planétaires, même avec des télescopes plus petits. L'efficacité des trois filtres passe-haut (rouge, orange et jaune) culmine à 98 %, et l'efficacité des trois filtres passe-bande (vert, bleu, bleu foncé) atteint 70 %.\u003cbr\u003e\u003cbr\u003e Caractéristiques spectrales soigneusement conçues. Les filtres peuvent être empilés sans dégradation d'image ni image fantôme, afin de fournir des bandes passantes encore plus étroites. Ou combinez-le avec l'un des autres filtres Baader pour des possibilités intéressantes. Pour les traces spectrales réelles, voir Courbes de transmission du filtre de couleur.\u003cbr\u003e\u003cbr\u003e Aucune réduction de la netteté, même à des grossissements élevés ou lors de l'utilisation du filtre loin devant le plan focal (par exemple, imagerie numérique, ou devant une diagonale ou une binoculaire).\u003cbr\u003e\u003cbr\u003e En utilisant la taille 2\", un seul filtre est nécessaire pour la vision binoculaire. Seuls les filtres colorés Baader ont la qualité optique nécessaire pour une utilisation aussi loin en avant du plan focal.\u003c\/p\u003e\n\u003ch6\u003e \u003c\/h6\u003e\n\u003ca href=\"#baader-phantom-group-coating_0-1\" id=\"st-link-baader-phantom-group-coating_0-1\" class=\"station-tabs-link\" role=\"tab\" aria-controls=\"st-baader-phantom-group-coating_0-1\" aria-selected=\"false\" tabindex=\"-1\"\u003e\u003cspan\u003eBaader Phantom Group Coating™\u003c\/span\u003e\u003c\/a\u003e\u003cdiv\u003e\n\n\u003cp\u003eDéveloppé par Baader Planetarium, le revêtement est un revêtement à large bande à 7 couches avec une réflexion résiduelle extrêmement faible. Le terme \"Groupe\" indique que le système de couche anti-reflet le plus efficace respectif a été calculé pour chaque type de verre du filtre.\u003c\/p\u003e\n\n\u003cp\u003eCela signifie que les couches anti-reflet des différents filtres de couleur sont différentes. Ils sont calculés pour fournir le maximum pour les valeurs de transmission de couleur filtrées respectives.\u003c\/p\u003e\n\n \u003cp\u003eLes deux côtés du filtre sont recouverts d'un revêtement AR à 7 couches avec seulement 0,25 % de réflexion résiduelle par surface. C'est le maximum qui ait jamais été fourni pour les filtres de couleur. Les disques filtrants sont vissés dans les cadres en aluminium noirci et sont livrés dans un filtre. Chaque filtre est conçu pour de multiples applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"\/fr-int\/pages\/why-baader-planetarium-filters\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePourquoi les filtres de planétarium Baader ?\u003c\/a\u003e\u003c\/p\u003e\n\n\n\u003c\/div\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\u003eBleu foncé\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\u003e1.25\"=2458302 | 2\"= \u003cspan\u003e2458312\u003c\/span\u003e\n \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825025111 | \u003cspan\u003e4047825009708\u003c\/span\u003e\n\n\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 | \u003cspan\u003e0,066\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR\u003c\/th\u003e\n\n\u003ctd\u003eBleu foncé\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\u003e\u0026gt; 435 nm\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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 | \u003cspan\u003e2 pouces\u003c\/span\u003e\n\n\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\u003eCouleur, 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\u003ePasse-bande\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 \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\u003ch2\u003eVert\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\u003e1.25\"= \u003cspan\u003e2458304\u003c\/span\u003e | 2\"= \u003cspan\u003e2458314\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e\n\n\u003cspan\u003e4047825009777 |\u003c\/span\u003e 4047825009685\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n \u003ctd\u003e\n\n\u003cspan\u003e0,059 |\u003c\/span\u003e 0,066\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR\u003c\/th\u003e\n\n\u003ctd\u003eVert\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\u003e\u0026gt; 500 nm\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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 | 2 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\u003eCouleur, 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\u003ePasse-bande\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\u003ch2\u003eBleu clair\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 \u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eUGS (#)\u003c\/th\u003e\n\n\u003ctd\u003e1.25\"=2458303 | 2\"= \u003cspan\u003e2458313\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009791 | \u003cspan\u003e4047825009692\u003c\/span\u003e\n\n\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 | \u003cspan\u003e0,066\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR\u003c\/th\u003e\n\n\u003ctd\u003eBleu clair\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\u003e\u0026gt; 495 nm\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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 | \u003cspan\u003e2 pouces\u003c\/span\u003e\n\n\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\u003eCouleur, 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\u003ePasse-bande \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\u003ch2\u003eOrange\u003c\/h2\u003e\n\n\u003cp\u003e\u003c\/p\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\u003e1.25\"=2458306 | 2\"= \u003cspan\u003e2458316\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n \u003ctd\u003e4047825009746 | \u003cspan\u003e4047825009678\u003c\/span\u003e\n\n\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 | \u003cspan\u003e0,066\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR\u003c\/th\u003e\n\n\u003ctd\u003eOrange\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\u003e\u0026gt; 570 nm\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, plan poli optiquement\u003c\/td\u003e\n\n \u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTAILLE DU FILTRE\u003c\/th\u003e\n\n\u003ctd\u003e1 25 pouces | \u003cspan\u003e2 pouces\u003c\/span\u003e\n\n\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\u003eCouleur, 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\u003eLongue passe\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 \u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eRouge\u003c\/h2\u003e\n\n\u003cp\u003e\u003c\/p\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\u003e1.25\"=2458307 | 2\"= \u003cspan\u003e2458317\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009739 | \u003cspan\u003e4047825009661\u003c\/span\u003e\n\n\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 | \u003cspan\u003e0,066\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR \u003c\/th\u003e\n\n\u003ctd\u003eRouge\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\u003e\u0026gt; 610 nm\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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 | \u003cspan\u003e2 pouces\u003c\/span\u003e\n\n\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\u003eCouleur, 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\u003eLongue passe\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\u003ch2\u003eJaune\u003c\/h2\u003e\n\n\u003cp\u003e\u003c\/p\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\u003e1.25\"=2458301 | 2\"= \u003cspan\u003e2458311\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009814 | \u003cspan\u003e4047825009715\u003c\/span\u003e\n\n\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 | \u003cspan\u003e0,066\u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCOULEUR\u003c\/th\u003e\n\n\u003ctd\u003eJaune\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\u003e\u0026gt; 495 nm\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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 | \u003cspan\u003e2 pouces\u003c\/span\u003e\n\n\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\u003eCouleur, 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\u003eLongue passe\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\n\u003c\/div\u003e\n\n\n\u003c\/div\u003eSUPPORTZ\u003cp\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_color_filters.pdf?v=1684340680?v=1590482785\" target=\"_blank\"\u003eFiche technique des filtres de couleur Baader\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po \/ Bleu brillant","offer_id":44967360561437,"sku":"BAA-2458303","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ Bleu brillant","offer_id":44967360594205,"sku":"BAA-2458313","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ Bleu foncé","offer_id":44967360626973,"sku":"BAA-2458302","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ Bleu foncé","offer_id":44967360659741,"sku":"BAA-2458312","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ Vert","offer_id":44967360692509,"sku":"BAA-2458304","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ Vert","offer_id":44967360725277,"sku":"BAA-2458314","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ Orange","offer_id":44967360758045,"sku":"BAA-2458306","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ Orange","offer_id":44967360790813,"sku":"BAA-2458316","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ Rouge","offer_id":44967360823581,"sku":"BAA-2458307","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ Rouge","offer_id":44967360856349,"sku":"BAA-2458317","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ Jaune","offer_id":44967360889117,"sku":"BAA-2458301","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ Jaune","offer_id":44967360921885,"sku":"BAA-2458311","price":110.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Individual-Color-Filters-1__91240.1597110976.1280.1280.jpg?v=1684341060"},{"product_id":"baader-color-filter-set-6-colors","title":"Baader Ensemble de Filtres de Couleur - 6 Couleurs","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cstrong\u003e\"Moins est plus!\" Mieux vaut quelques filtres à hautes performances optiques produits pour les observations astronomiques que des montagnes entières de filtres de qualité médiocre.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n \u003cli\u003e\u003cspan\u003eEnsemble de filtres de couleur avec 6 couleurs pour l'amélioration du contraste des observations lunaires et planétaires.\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003eFiltres inclus : filtre bleu foncé, filtre bleu clair, filtre vert, filtre jaune, filtre orange et filtre rouge\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003eLa plus grande ouverture libre de tous les filtres de couleur du marché pour éliminer tout vignettage.\u003c\/li\u003e\n\n\u003cli\u003eLa \"couronne de préhension\" usinée CNC offre une excellente maniabilité et un excellent confort.\u003c\/li\u003e\n\n\u003cli\u003eRevêtement AR à 7 couches des deux côtés avec seulement 0,25 % de réflexion résiduelle par surface. Il s'agit du revêtement le plus antireflet jamais réalisé avec des filtres de couleur.\u003c\/li\u003e\n\n\u003cli\u003e\u003cspan\u003eRevêtement scellé non vieillissant\u003c\/span\u003e\u003c\/li\u003e\n\n\u003cli\u003eLe critère le plus important pour tout type de filtrage de la lumière est la luminosité. Certaines plages spectrales à fort grossissement ne fonctionneront qu'à la transmission lumineuse la plus élevée.\u003c\/li\u003e\n\n \u003cli\u003eLe filtre passe-haut de cet ensemble de filtres offre une transmission de 98 % et ne produit aucune lumière parasite. Inégalé par d'autres marques. Cela se voit facilement par rapport aux filtres de couleur standard - les couleurs du filtre sont beaucoup plus éclatantes\u003c\/li\u003e\n\n\u003cli\u003eLa combinaison de notre filtre de coupure infrarouge (IR) 1¼\" et du filtre rouge RG 610 donne un filtre passe-haut à bande extrêmement étroite pour la photographie CCD des nébuleuses à émission rouge - à un prix ridiculement bas !\u003c\/li\u003e\n\n\u003cli\u003eUne large gamme d'adaptateurs permet l'utilisation de fils photo T-2 (Voir : Baader Astro T-2 System™).\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003ePas seulement un autre filtre coloré. Enfin, un ensemble d'outils sérieux pour l'observateur planétaire. Les filtres colorés Premium de Baader Planetarium apportent un nouveau niveau de qualité et de performance à l'amélioration du contraste planétaire. Disponible seul ou en ensemble complet de 6 filtres dans les tailles 1¼\" et 2\".\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003eLiberté des images fantômes, même lorsqu'elles sont empilées. Les substrats sans stries sont polis parallèlement à 30 secondes pour éviter les erreurs de coin. Les multicouches dures à 7 couches les plus fines sur les deux faces présentent 0,25 % de réflexions résiduelles (les filtres Baader sont uniques, aucun autre filtre coloré n'intègre de multicouches antireflet). Les revêtements sont également différents pour chacun des filtres, afin d'adapter les performances du revêtement à la courbe de filtre de chaque couleur. Cela maximise la transmission et minimise les réflexions.\u003cbr\u003e\u003cbr\u003e Les transmissions extrêmement élevées se traduisent par un contraste et une isolation maximum des détails planétaires, même avec des télescopes plus petits. L'efficacité des trois filtres passe-haut (rouge, orange et jaune) culmine à 98 %, et l'efficacité des trois filtres passe-bande (vert, bleu, bleu foncé) atteint 70 %.\u003cbr\u003e \u003cbr\u003eCaractéristiques spectrales soigneusement conçues. Les filtres peuvent être empilés sans dégradation d'image ni image fantôme, afin de fournir des bandes passantes encore plus étroites. Ou combinez-le avec l'un des autres filtres Baader pour des possibilités intéressantes. Pour les traces spectrales réelles, voir Courbes de transmission du filtre de couleur.\u003cbr\u003e\u003cbr\u003e Aucune réduction de la netteté, même à des grossissements élevés ou lors de l'utilisation du filtre loin devant le plan focal (par exemple, imagerie numérique, ou devant une diagonale ou une binoculaire).\u003cbr\u003e\u003cbr\u003e En utilisant la taille 2\", un seul filtre est nécessaire pour la vision binoculaire. Seuls les filtres colorés Baader ont la qualité optique nécessaire pour une utilisation aussi loin en avant du plan focal.\u003c\/p\u003e\n\u003ch6\u003e\u003c\/h6\u003e \u003ca href=\"#baader-phantom-group-coating_0-1\" id=\"st-link-baader-phantom-group-coating_0-1\" class=\"station-tabs-link\" role=\"tab\" aria-controls=\"st-baader-phantom-group-coating_0-1\" aria-selected=\"false\" tabindex=\"-1\"\u003e\u003cspan\u003eBaader Phantom Group Coating™\u003c\/span\u003e\u003c\/a\u003e\u003cdiv\u003e\n\n \u003cp\u003eDéveloppé par Baader Planetarium, le revêtement est un revêtement à large bande à 7 couches avec une réflexion résiduelle extrêmement faible. Le terme \"Groupe\" indique que le système de couche anti-reflet le plus efficace respectif a été calculé pour chaque type de verre du filtre.\u003c\/p\u003e\n\n\u003cp\u003eCela signifie que les couches anti-reflet des différents filtres de couleur sont différentes. Ils sont calculés pour fournir le maximum pour les valeurs de transmission de couleur filtrées respectives.\u003c\/p\u003e\n\n\u003cp\u003eLes deux côtés du filtre sont recouverts d'un revêtement AR à 7 couches avec seulement 0,25 % de réflexion résiduelle par surface. C'est le maximum qui ait jamais été fourni pour les filtres de couleur. Les disques filtrants sont vissés dans les cadres en aluminium noirci et sont livrés dans un filtre. Chaque filtre est conçu pour de multiples applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"\/fr-int\/pages\/why-baader-planetarium-filters\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePourquoi les filtres de planétarium Baader ?\u003c\/a\u003e \u003c\/p\u003e\n\n\n\u003c\/div\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\n\n\u003ccolgroup\u003e\n\n\u003ccol width=\"25%\"\u003e\n\n\u003ccol\u003e\n\n\n\u003c\/colgroup\u003e\n\n\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\u003e2458300\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009821\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,354\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\u003eplusieurs bandes (voir image spectrale)\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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\u003eCouleur, 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 \u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTYPE DE FILTRE\u003c\/th\u003e\n\n\u003ctd\u003ePasse-bande, passe-haut\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\u003eEnsemble de filtres\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\n\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\u003e2458310\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN \u003c\/th\u003e\n\n\u003ctd\u003e4047825009722\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,396\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\u003eplusieurs bandes (voir image spectrale)\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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\u003eCouleur, 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\u003ePasse-bande, passe-haut\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\u003eEnsemble de filtres\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\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\n\n \u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_color_filters.pdf?v=1684340680?v=1590482785\" target=\"_blank\"\u003eFiche technique des filtres de couleur Baader\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967361839389,"sku":"BAA-2458300","price":401.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967361872157,"sku":"BAA-2458310","price":605.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Color-Filter-Set-6-Colors-1__26791.1597110981.1280.1280.jpg?v=1684341108"},{"product_id":"baader-moon-skyglow-filter","title":"Filtre Baader Moon \u0026amp; Skyglow","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eFiltre de contraste sélectif, pour tous les télescopes réflecteurs et réfracteurs\u003c\/li\u003e\n\n \u003cli\u003eFiltre les longueurs d'onde spécifiques, en particulier celles causées par l'éclairage public et surtout leur lumière diffusée qui éclaire le ciel nocturne\u003c\/li\u003e\n\n\u003cli\u003eLe blocage sélectif conserve les couleurs naturelles intactes, mais avec un RVB considérablement amélioré, ce qui entraîne des contrastes de couleurs plus importants.\u003c\/li\u003e\n\n\u003cli\u003e95% de transmission dans la gamme spectrale sélectionnée.\u003c\/li\u003e\n\n\u003cli\u003eConvient à tous les filetages de filtre standard et peut être combiné avec d'autres filtres, par exemple les filtres de couleur planétaires Baader polis optiquement. De cette façon, vous pouvez mieux voir les détails fins ou combiner plusieurs images avec un appareil photo monochrome pour obtenir des images en couleur.\u003c\/li\u003e\n\n\u003cli\u003eLe filtre est également optimisé pour l'astrophotographie grâce à son revêtement anti-UV\/IR complet. Lorsqu'elles sont utilisées avec des reflex numériques, les étoiles resteront beaucoup plus étroites, car les parties UV et IR non focalisées du spectre sont bloquées.\u003c\/li\u003e\n\n \u003cli\u003ePlaneoptically poli ; peut être utilisé devant une binoculaire ou pour la photographie afocale - loin de la mise au point sans perte de netteté !\u003c\/li\u003e\n\n\u003cli\u003eLe polissage optique fin et l'absence d'erreur de coin dans le verre garantissent une netteté parfaite lors d'un grossissement supérieur à 200x - tandis que les verres filtrants \"poli au feu\" beaucoup moins chers détruisent le front d'onde optique à des mags élevés\u003c\/li\u003e\n\n\u003cli\u003eVerre optique dopé au néodyme\u003c\/li\u003e\n\n\u003cli\u003eRevêtements avant\/arrière : revêtement BBAR dur à 7 couches \/ revêtement anti-UV\/IR diélectrique à 27 couches\u003c\/li\u003e\n\n\u003cli\u003eRevêtements durcis par faisceau d'ions ultra-durs et durables - peuvent être nettoyés à tout moment sans crainte. Bords de revêtement scellés anti-vieillissement.\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"\/fr-int\/pages\/why-baader-planetarium-filters\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePourquoi les filtres de planétarium Baader ?\u003c\/a\u003e\u003c\/li\u003e\n\n\n\u003c\/ul\u003e \u003cp\u003eLe filtre Baader Planetarium Moon \u0026amp; Skyglow (néodyme) apporte une approche tout à fait unique à l'amélioration du contraste planétaire et à la réduction de la pollution lumineuse. Sur la base de recherches antérieures chez Carl Zeiss, Baader a développé un filtre qui utilise du verre au néodyme qui filtre quelques longueurs d'onde spécifiques des lampadaires ainsi que la lueur du ciel de la Lune. Les caractéristiques spectrales uniques du néodyme renforcent également les contrastes de couleurs en isolant les régions rouge, verte et bleue (ce que l'on appelle l'amélioration RVB). Le résultat est un filtre qui laisse les couleurs naturelles pour la plupart intactes, mais considérablement améliorées.\u003cbr\u003e \u003cbr\u003eLes vues planétaires et lunaires sont améliorées dans tous les oscilloscopes, réflecteurs, réfracteurs (APO ou Achro). La grande tache rouge de Jupiter et les teintes rouges des bandes sont sensiblement améliorées et le contraste des caractéristiques de la surface martienne est renforcé. Le ciel d'arrière-plan est assombri et les détails subtils sont améliorés. La haute efficacité du filtre préserve la luminosité de l'image et de nombreuses galaxies, nébuleuses et amas d'étoiles globulaires sont améliorés en raison de la réduction de la lueur du ciel due à l'éclairage artificiel. Pour un examen pratique du filtre Moon \u0026amp; Skyglow, visitez la section d'examen des accessoires sur www.cloudynights.com.\u003cbr\u003e\u003cbr\u003e La haute qualité des filtres Baader Planetarium permet un empilement sans dégradation de l'image. Les propriétaires d'Achromat trouveront que la combinaison de Moon \u0026amp; Skyglow et du nouveau filtre Fringe Killer est idéale pour l'observation planétaire. Le débit lumineux élevé et la coloration naturelle permettront aux achromates de fonctionner davantage comme des apochromates. Une version intégrée est également disponible, le filtre Semi-APO.\u003cbr\u003e \u003cbr\u003eLe Moon \u0026amp; Skyglow est également optimisé pour les imageurs, en raison de son blocage IR complet (voir la courbe de filtre sur la fiche technique incluse dans le lien ci-dessous).\u003cbr\u003e\u003cbr\u003e Le substrat du filtre est une fusion spéciale de verre dopé au néodyme, conçu pour des caractéristiques de transmission spécifiques et fabriqué uniquement pour le planétarium Baader. En plus de ses caractéristiques spectrales uniques, contrairement à la plupart des filtres, les surfaces Baader Moon \u0026amp; Skyglow sont optiquement polies pour offrir la meilleure netteté et le meilleur contraste d'image possible.\u003cbr\u003e \u003cbr\u003eLes images ci-dessous montrent la grande amélioration du contraste sur Mars. L'image de gauche a été prise sans filtration, tandis que l'image de droite a été prise à travers un Moon \u0026amp; Skyglow. L'image Moon \u0026amp; Skyglow montre un contraste nettement plus élevé et des caractéristiques de surface à peine visibles sans le filtre. Les deux images ont été acquises à l'identique, sans aucun traitement d'image ni amélioration du contraste, et donnent une très bonne idée de l'amélioration du contraste planétaire visible visuellement. Le Moon \u0026amp; Skyglow ne quitte jamais nos propres télescopes lors de l'observation des planètes et de la lune.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"source=\" https:\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eImage reproduite avec l'aimable autorisation de Jeremy Summers. Prise en novembre 2005 avec un appareil photo numérique Meade LXD55 8\" SCT et Canon A510 en mode vidéo\u003c\/strong\u003e\u003cbr\u003e \u003cstrong\u003e(images brutes empilées avec Registax, aucun traitement pour l'une ou l'autre image).\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\u003e2458305A\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009753\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\u003eplusieurs bandes (voir image spectrale)\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\u003e1 millimètre\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003cth\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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\u003eCCD, Amélioration du contraste, Correction des couleurs, IR-Cut, Réduction de la pollution lumineuse, Lunaire, 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\u003ePasse-bande\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 \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\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\u003e2458334A\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,062\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\u003eplusieurs bandes (voir image spectrale)\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\u003e1 millimètre\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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\u003eCCD, Amélioration du contraste, Correction des couleurs, IR-Cut, Réduction de la pollution lumineuse, Lunaire, 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\u003ePasse-bande\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\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_neodymium_moon_and_skyglow_filter.pdf?v=1684340698?v=1590140455\" target=\"_blank\"\u003eBaader Filtre Neodymium Moon \u0026amp; Skyglow\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_testreview_neodymium_moon_and_skyglow_t_licha.pdf?v=1684340701?v=1590140455\" target=\"_blank\"\u003eRevue de test - Neodymium Moon and Skyglow - T. Licha\u003c\/a\u003e\u003c\/p\u003e\n\n \u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_testreview_baader_anti_fringing_filters_astronomy_technology_today.pdf?v=1684340675?v=1590139318\" target=\"_blank\"\u003eRevue de test - Filtres anti-fringing Baader - Astronomy Technology Today\u003c\/a\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967363707165,"sku":"BAA-2458305A","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967363739933,"sku":"BAA-2458334A","price":213.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Moon-Skyglowfilter-1-25-inch-1__79976.1597110984.1280.1280.jpg?v=1684341362"},{"product_id":"baader-neutral-density-filter-nd-0-6-0-9-1-8-3-0","title":"Baader Filtre de Densité Neutre - ND 0.6\/0.9\/1.8\/3.0","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003ePour réduire la luminosité et pendant l'observation lunaire et solaire. Convient pour l'observation solaire uniquement en tant que post-filtre supplémentaire !\u003c\/li\u003e\n\n\u003cli\u003eLe polissage optique fin n'entraîne aucune perte de netteté à des grossissements élevés, même avec une position de filtre loin devant le point focal.\u003c\/li\u003e\n\n\u003cli\u003eGroupe fantôme enduit. Pas de fantômes, de reflets ou de lumière parasite. \u003c\/li\u003e\n\n\u003cli\u003eLe filetage des deux côtés du verre permet une combinaison avec d'autres filtres (par exemple, les filtres de couleur Baader).\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eInformations importantes pour observer le soleil\u003c\/h3\u003e\n\u003cp\u003e Les filtres polarisants et à densité neutre nécessitent un filtrage supplémentaire en amont de la lunette ou de l'oculaire pour toute observation du soleil (par exemple, Baader Herschel Prism ou Baader Astro Solar Safety Film). L'utilisation sans les filtres solaires sûrs appropriés peut causer des dommages permanents à ces filtres et à la vue.\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\u003e0,6=2458343 | 0,9=2458344 | 1.8=2458345 | 3.0=2458346 \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009593\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\u003eDENSITÉ NEUTRE\u003c\/th\u003e\n\n\u003ctd\u003eND 0,6 | 0,9 | 1.8 | 3.0\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\u003espectre complet\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, plan poli optiquement \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eTRANSMISSION\u003c\/th\u003e\n\n\u003ctd\u003e25%\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFACTEUR D'AMORTISSEMENT\u003c\/th\u003e\n\n\u003ctd\u003e4x\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\u003eLunaire, planétaire, solaire\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\u003eDensité neutre\u003c\/td\u003e\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\u003ch2\u003e2\"\u003c\/h2\u003e\n\n\u003ctable\u003e\n\n\u003ccolgroup\u003e\n\n\u003ccol width=\"25%\"\u003e\n\n\u003ccol\u003e\n\n\n\u003c\/colgroup\u003e\n\n\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\u003e0,6=2458321 | 0,9=2458322 | 1.8=2458331 | 3.0=2458332\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009654\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,066\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eDENSITÉ NEUTRE\u003c\/th\u003e\n\n\u003ctd\u003eND 0,6 | 0,9 | 1.8 | 3.0\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\u003espectre complet\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, plan poli optiquement\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n \u003cth\u003eTRANSMISSION\u003c\/th\u003e\n\n\u003ctd\u003e25%\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFACTEUR D'AMORTISSEMENT\u003c\/th\u003e\n\n\u003ctd\u003e4x\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\u003eLunaire, planétaire, solaire\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\u003eDensité neutre\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\n\n\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po \/ ND 0,6","offer_id":44967363805469,"sku":"BAA-2458343","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ ND 0,6","offer_id":44967363838237,"sku":"BAA-2458321","price":118.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ ND 0,9","offer_id":44967363871005,"sku":"BAA-2458344","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ ND 0,9","offer_id":44967363903773,"sku":"BAA-2458322","price":118.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ ND 1.8","offer_id":44967363936541,"sku":"BAA-2458345","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ ND 1.8","offer_id":44967363969309,"sku":"BAA-2458331","price":118.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 1,25 po \/ ND 3.0","offer_id":44967364002077,"sku":"BAA-2458346","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\" \/ ND 3.0","offer_id":44967364034845,"sku":"BAA-2458332","price":118.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Neutral-Density-Filter-ND-1__33295.1597110986.1280.1280.jpg?v=1684341118"},{"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":"baader-polarizing-filter-single","title":"Baader Filtre Polarisant - Simple","description":"\u003c!-- more --\u003e\u003ch4\u003e Filtre Polarisant Baader\u003c\/h4\u003e\n\u003cp\u003e Se visse dans des oculaires\/filetages de 1¼ ou 2\". Utile dans les observations lunaires et solaires pour limiter la luminosité et augmenter le contraste.\u003c\/p\u003e\n\u003cp\u003e Le filtre peut également être utilisé avec un Baader Hershel Wedge pour fournir une luminosité variable réglable. Positionné entre le Baader Hershel Wedge et l'oculaire, la combinaison filtre\/oculaire peut ensuite être tournée pour régler la luminosité.\u003c\/p\u003e\n\u003ch4\u003e Informations importantes pour observer le soleil\u003c\/h4\u003e\n\u003cp\u003e \u003cspan\u003eLes filtres polarisants et à densité neutre nécessitent un filtrage supplémentaire en amont de la lunette ou de l'oculaire pour toute observation du soleil (par exemple, Baader Herschel Prism ou Baader Astro Solar Safety Film). L'utilisation sans les filtres solaires sûrs appropriés peut causer des dommages permanents à ces filtres et à la vue.\u003c\/span\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\u003e2408343\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825012449\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,06\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\u003espectre complet\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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\u003eLunaire, Planétaire, Solaire, Spécialité\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFILTRE MONTÉ\u003c\/th\u003e\n\n\u003ctd\u003eDouble montage (LPFC 6mm) - hauteur totale 15mm\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\u003eDensité neutre, polarisant\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\u003ch2\u003e2\"\u003cbr\u003e\n\n\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\u003e2408342\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825012456\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,081 \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\u003espectre complet\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, 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\u003eLunaire, Planétaire, Solaire, Spécialité\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFILTRE MONTÉ\u003c\/th\u003e\n\n \u003ctd\u003eDouble montage (LPFC 6mm) - hauteur totale 15mm\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\u003eDensité neutre, polarisant\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\u003ch6\u003e\u003c\/h6\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967364198685,"sku":"BAA-2408343","price":62.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967364231453,"sku":"BAA-2408342","price":105.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Polarizing-Filter-Single-1__55320.1597110991.1280.1280.jpg?v=1684341161"},{"product_id":"baader-polarizing-filter-double","title":"Baader Filtre Polarisant - Double","description":"\u003c!-- more --\u003e\u003ch4\u003e Baader Double Filtre Polarisant\u003c\/h4\u003e \u003cp\u003eSe visse dans des oculaires\/filetages de 1¼ ou 2\". Les deux filtres peuvent être tournés l'un par rapport à l'autre pour ajuster de manière variable le niveau de luminosité pour les observations lunaires. Le filtre double polarisant Baader peut également être utilisé pour les observations solaires en combinaison avec un filtre solaire objectif fabriqué d'Astro Solar Film.\u003c\/p\u003e\n\u003cp\u003e Les filtres polarisants doubles en 1¼ ou 2\" ne peuvent pas être séparés en deux parties, vous ne pouvez donc pas prendre une moitié comme un seul filtre, par exemple pour une cale Herschel. La raison en est la stabilité et la qualité : si les deux boîtiers pouvaient être séparés , ils peuvent bouger ou être inclinés l'un par rapport à l'autre, ce qui pourrait nuire à la qualité de l'image et provoquer des reflets.\u003c\/p\u003e\n\u003ch4\u003e Informations importantes pour observer le soleil\u003c\/h4\u003e\n\u003cp\u003e \u003cspan\u003eLes filtres polarisants et à densité neutre nécessitent un filtrage supplémentaire en amont de la lunette ou de l'oculaire pour toute observation du soleil (par exemple, Baader Herschel Prism ou Baader Astro Solar Safety Film). L'utilisation sans les filtres solaires sûrs appropriés peut causer des dommages permanents à ces filtres et à la vue.\u003c\/span\u003e\u003c\/p\u003e \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\u003e2408340\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825012463\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,042\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\u003espectre complet\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, plan poli optiquement\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCARACTÉRISTIQUES SPÉCIALES\u003c\/th\u003e\n\n\u003ctd\u003efiltre polarisant double pour un réglage continu de la luminosité\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\u003eLunaire, Planétaire, Solaire, Spécialité\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFILTRE MONTÉ\u003c\/th\u003e\n\n\u003ctd\u003eDouble montage (LPFC 6mm) - hauteur totale 15mm \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\u003eDensité neutre, polarisant\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\u003ch2\u003e2\"\u003c\/h2\u003e\n\n\u003ctable\u003e\n\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\u003e2408344\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN \u003c\/th\u003e\n\n\u003ctd\u003e4047825022714\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,078\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\u003espectre complet\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\u003eREVÊTEMENT AR\u003c\/th\u003e\n\n\u003ctd\u003eGroupe Phantom Coating®, plan poli optiquement\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCARACTÉRISTIQUES SPÉCIALES\u003c\/th\u003e\n\n\u003ctd\u003efiltre polarisant double pour un réglage continu de la luminosité\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\u003eLunaire, Planétaire, Solaire, Spécialité\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eFILTRE MONTÉ\u003c\/th\u003e\n\n\u003ctd\u003eDouble montage (LPFC 6mm) - hauteur totale 15mm\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\u003eDensité neutre, polarisant\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\u003ch6\u003e\u003c\/h6\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967364428061,"sku":"BAA-2408340","price":117.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967364460829,"sku":"BAA-2408344","price":169.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Polarizing-Filter-Double-1__41097.1597110992.1280.1280.jpg?v=1684341169"},{"product_id":"baader-u-venus-filter-350nm","title":"Baader Filtre U-Venus - 350nm","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eBaader U-Filter (Vénus et UV) 350nm.\u003c\/li\u003e\n\n \u003cli\u003ePic de transmission env. 80% à 350nm, bande passante 60nm (320-380nm), bloquant complètement toute la gamme spectrale de 200nm à 1120nm.\u003c\/li\u003e\n\n\u003cli\u003eMulticouche diélectrique sur verre Schott poli optiquement.\u003c\/li\u003e\n\n\u003cli\u003ePermet l'imagerie dans la région spectrale UV profonde. Une \"percée\" pour l'imagerie de la planète Vénus ! Permet aux astronomes amateurs de capturer les structures nuageuses de l'atmosphère vénusienne.\u003c\/li\u003e\n\n\u003cli\u003eUne application astro réussie de ce filtre nécessite un module de caméra d'imagerie chanceux sensible aux UV approprié (c'est-à-dire SKYRIS 274M) avec au moins un télescope de 5\" de diamètre (un télescope de 8\" de diamètre est recommandé).\u003c\/li\u003e\n\n\u003cli\u003eApplications non astronomiques possibles : par exemple vérifier les dommages de peinture sur les voitures ou l'état de santé des plantes et bien plus encore.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e \u003cp\u003eUn autre filtre unique et pionnier du Planétarium Baader. Pour la première fois, les amateurs peuvent désormais enregistrer des structures nuageuses sur Vénus. Le filtre Baader Venus permet aux amateurs d'imager avec succès dans l'UV profond, une région spectrale normalement inaccessible.\u003cbr\u003e \u003cbr\u003eLes dernières technologies de revêtement permettent au filtre Baader Venus de transmettre de 300 nm à 400 nm, avec une transmission maximale de 80 %. Le filtre bloque complètement le reste de la région de 200 nm à 1500 nm, grâce à l'utilisation d'un empilement de revêtement diélectrique complexe à 20 couches, au-dessus d'un substrat spécial UG-11 poli optiquement. Jusqu'à présent, les efforts d'amateur reposaient généralement sur des filtres de couleur violet foncé, ou des combinaisons avec des filtres d'interférence plus simples, qui n'offrent pas une transmission élevée et un rejet efficace en dehors de la région spectrale importante de 320 nm à 390 nm. Compte tenu des faibles transmissions de nombreuses optiques dans l'UV et de la sensibilité plus faible de certains CCD à cette longueur d'onde, une efficacité de filtre élevée et un rejet complet à des longueurs d'onde plus longues deviennent primordiaux pour enregistrer un bon contraste à des expositions raisonnables. La même qualité optique élevée et les mêmes caractéristiques que les autres filtres Baader garantissent le contraste le plus élevé et les images les plus nettes possibles. Fait intéressant, le Calcium K-Line solaire se trouve également dans la bande passante de ce filtre. Cela ouvre la possibilité passionnante d'enregistrer des structures d'éruption sur le disque solaire ou les bords.\u003c\/p\u003e \u003cp\u003eLe filtre Baader U est devenu le choix des imageurs UV explorant le monde UV de l'imagerie paysagère, florale et même médico-légale. Le dernier filtre 2 \"a maintenant une transmission encore plus élevée et un blocage hors bande amélioré. En utilisant notre bague d'adaptation de filtre DSLR-2 plus la bague de filtre appropriée (HDT-Rings), les imageurs UV peuvent facilement monter le filtre U sur leur caméra lentille.\u003cbr\u003e\u003cbr\u003e Voici quelques sites UV utiles et intéressants avec de belles images de fleurs et des informations sur l'imagerie UV. De là, vous pouvez également accéder à de nombreux autres sites UV :\u003cbr\u003e\u003cbr\u003e \u003ca href=\"http:\/\/www.naturfotograf.com\/uvstart.html#top\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ehttp:\/\/www.naturfotograf.com\/uvstart.html#top\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e \u003ca href=\"http:\/\/www.beyondvisible.com\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ehttp:\/\/www.beyondvisible.com\/\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e \u003ca href=\"http:\/\/www.beyondvisible.com\/BV6i-links.html\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ehttp:\/\/www.beyondvisible.com\/BV6i-links.html\u003c\/a\u003e\u003cbr\u003e \u003cbr\u003e\u003cstrong\u003eVeuillez noter :\u003c\/strong\u003e le filtre Baader Venus est uniquement applicable pour l'imagerie de Vénus avec des caméras Webcam, numériques et CCD (l'observation visuelle est impossible, en raison de l'insensibilité de l'œil aux UV). Pour une imagerie réussie de Vénus, nous recommandons l'utilisation d'une caméra CCD astro sensible aux UV (c'est-à-dire SBIG ST-2000XM) et d'au moins un télescope de 5\", ou une webcam et un télescope de 8\".\u003c\/p\u003e\n\u003cp\u003e \u003ca title=\"En savoir plus sur le filtre Baader Venus u et les applications non astronomiques\" href=\"\/fr-int\/pages\/baader-venus-u-filter-non-astro-applications\"\u003eEn savoir plus sur le filtre Baader Venus U-Venus et les applications non astro\u003c\/a\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\u003e2458292 \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825022240\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,058\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\u003eUV\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\u003e60nm\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\u003e350 nm\u003c\/td\u003e\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\u003eSpécialité, UV-Pass\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 \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\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\u003e2458291\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCODE EAN\u003c\/th\u003e\n\n\u003ctd\u003e4047825009838\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003ePOIDS (KG)\u003c\/th\u003e\n\n\u003ctd\u003e0,061\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\u003eUV \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\u003e60nm\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\u003e350 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\u003eSpécialité, UV-Pass \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\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"moretab\" data-title=\"Downloads \u0026amp; Support\"\u003e\n\n \u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_faq_problems_with_filters_can_have_the_strangest_causes.pdf?v=1684340622?v=1590138683\" target=\"_blank\"\u003eFAQ - Les problèmes avec les filtres peuvent avoir les causes les plus étranges\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/6\/assets\/description_image_baader_u_filter_for_terrestrial_photography.pdf?v=1684340722?v=1590482523\" target=\"_blank\"\u003eBaader U-Filter pour la photographie terrestre\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cdiv\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Monté rond de 1,25 po","offer_id":44967365476637,"sku":"BAA-2458292","price":348.0,"currency_code":"CAD","in_stock":true},{"title":"Monté rond de 2\"","offer_id":44967365509405,"sku":"BAA-2458291","price":487.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-U-Venus-Filter-350nm-1__53498.1597110999.1280.1280.jpg?v=1684341185"},{"product_id":"zwo-ch4-methane-filter-20nm-1-25","title":"ZWO Filtre méthane CH4 - 20nm 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eRévèle les détails de haute altitude sur Jupiter et Saturne\u003c\/li\u003e\n\u003cli\u003eBande passante de 20nm centrée sur la raie d'absorption du méthane\u003c\/li\u003e\n\u003cli\u003eMonture filetée standard 1.25\" (31.75mm)\u003c\/li\u003e\n\u003cli\u003eRéduit les effets de la turbulence atmosphérique\u003c\/li\u003e\n\u003cli\u003eGarantie ZWO de 2 ans\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\u003eCaractéristiques\u003c\/li\u003e\n\u003cli\u003eDans la boîte\u003c\/li\u003e\n\u003cli\u003eTéléchargements\u003c\/li\u003e\n\u003cli\u003eGarantie\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\u003eZWO Filtre bande méthane CH4 20nm - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eLe filtre méthane ZWO CH4 isole une bande passante précise de 20nm dans le proche infrarouge, qui cible les fortes raies d'absorption du méthane dans l'atmosphère des géantes gazeuses. Logé dans une monture filetée standard 1.25\" (31.75mm), ce filtre est spécialement conçu pour révéler les nuages de haute altitude et les systèmes orageux de Jupiter et de Saturne, totalement invisibles en lumière 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\u003eIsoler les détails planétaires avec une bande passante de 20nm\u003c\/h3\u003e\n\u003cp\u003eLa FWHM (largeur à mi-hauteur) de 20nm est précisément calée sur la bande d'absorption du méthane (CH4). Lorsque vous imagez Jupiter, les régions riches en méthane absorbent cette longueur d'onde et apparaissent sombres, tandis que les structures de haute altitude comme la Grande Tache rouge ou les zones équatoriales brillantes la réfléchissent fortement, ce qui crée un contraste spectaculaire. Vous pouvez ainsi résoudre la stratification atmosphérique et les structures orageuses, autrement noyées dans les couches nuageuses plus basses et plus brillantes de la planète.\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\u003eUne imagerie moins sensible à la turbulence avec un filtre 1.25\"\u003c\/h3\u003e\n\u003cp\u003eComme ce filtre travaille dans le proche infrarouge, il tire parti d'un principe clé de l'optique atmosphérique : les grandes longueurs d'onde sont moins sensibles aux déformations dues à la turbulence de l'air (« seeing »). Par turbulence atmosphérique moyenne ou forte, le filtre ZWO CH4 peut fournir une image plus stable et plus nette qu'un filtre de luminance ou couleur classique. Cette stabilité est essentielle pour capter les fins détails planétaires, ce qui fait de ce filtre 1.25\" un outil indispensable pour les passionnés d'imagerie planétaire.\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\u003eCompatibilité et utilisation avec les caméras monochromes\u003c\/h3\u003e\n\u003cp\u003eCe filtre spécialisé est conçu pour les caméras monochromes ayant une bonne sensibilité dans le proche infrarouge. Il peut être utilisé avec certaines caméras couleur sensibles à l'IR, mais les meilleurs résultats s'obtiennent avec un capteur monochrome, sur lequel vous pouvez optimiser la pose pour cette longueur d'onde précise. La monture filetée standard 1.25\" s'adapte à toute roue à filtres, tout tiroir à filtres ou tout coulant 1.25\" standard, pour s'intégrer sans effort à votre train optique existant.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiletage standard :\u003c\/strong\u003e la monture 1.25\" est filetée pour se visser directement sur les accessoires astronomiques standard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimisé pour capteur monochrome :\u003c\/strong\u003e offre un contraste et des détails maximaux avec une caméra planétaire monochrome sensible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eÉtui de protection :\u003c\/strong\u003e livré avec un étui en plastique robuste qui garde le filtre protégé et propre lorsqu'il n'est pas utilisé.\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\"\u003eComment le filtre ZWO CH4 va-t-il changer mes images de la Grande Tache rouge de Jupiter ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLa Grande Tache rouge (GTR) est une tempête de haute altitude. Avec le \u003cstrong\u003efiltre ZWO CH4\u003c\/strong\u003e, la GTR apparaît exceptionnellement brillante par rapport aux bandes atmosphériques environnantes, plus sombres et riches en méthane. Son contraste et sa visibilité augmentent fortement, ce qui vous permet de capter sa structure même lorsqu'elle paraît délavée en lumière visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eQuelle caméra me faut-il pour utiliser le filtre ZWO CH4 20nm avec mon télescope ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIl vous faut une caméra d'imagerie ayant une bonne sensibilité dans le proche infrarouge (vers 890nm, là où le méthane absorbe). Les \u003cstrong\u003ecaméras planétaires monochromes\u003c\/strong\u003e sont le choix idéal, car elles ont généralement une sensibilité IR supérieure à celle des caméras couleur. Les reflex numériques standard ne sont généralement pas assez sensibles à cette longueur d'onde sans modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003ePuis-je utiliser le filtre ZWO CH4 en observation visuelle ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNon, ce filtre est conçu uniquement pour l'imagerie. L'œil humain n'est pas sensible aux longueurs d'onde du proche infrarouge transmises par le filtre ZWO CH4 : vous ne verriez rien à travers en visuel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eComment le filtre ZWO CH4 aide-t-il par forte turbulence atmosphérique ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLe filtre laisse passer la lumière du proche infrarouge. Ces grandes longueurs d'onde sont moins déformées par la turbulence de l'atmosphère terrestre (« seeing ») que les longueurs d'onde plus courtes du visible. Il en résulte une image plus stable sur le capteur, ce qui se traduit souvent par des images finales plus nettes les nuits où l'air est agité.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCe filtre ZWO CH4 1.25\" est-il compatible avec ma roue à filtres actuelle ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOui. Le filtre ZWO CH4 est logé dans une \u003cstrong\u003emonture filetée standard 1.25\" (31.75mm)\u003c\/strong\u003e. Il se visse dans toute roue à filtres, tout tiroir à filtres ou tout accessoire conçu pour recevoir des filtres astronomiques 1.25\" standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eLe filtre ZWO CH4 est-il utile pour d'autres planètes que Jupiter et Saturne ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eS'il est surtout efficace sur Jupiter et Saturne grâce à la forte présence de méthane dans leur atmosphère, il peut aussi servir à étudier l'atmosphère d'Uranus et de Neptune. Ces géantes de glace sont toutefois beaucoup plus faibles et plus petites, et demandent de plus grands télescopes et des poses plus longues pour obtenir de bons résultats.\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\u003eRéférence (SKU)\u003c\/td\u003e\n\u003ctd\u003eZWO-CH4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType de filtre\u003c\/td\u003e\n\u003ctd\u003eBande CH4 (méthane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBande passante (FWHM)\u003c\/td\u003e\n\u003ctd\u003e20nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTaille\u003c\/td\u003e\n\u003ctd\u003e31.75mm (1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat\u003c\/td\u003e\n\u003ctd\u003eMonture ronde filetée\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUtilisation prévue\u003c\/td\u003e\n\u003ctd\u003eImagerie planétaire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGarantie\u003c\/td\u003e\n\u003ctd\u003e2 ans\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\"\u003eFiltre méthane ZWO CH4 20nm en monture 1.25\"\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\"\u003eÉtui de filtre en plastique\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:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTélécharger les logiciels ZWO\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\/fr\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eGarantie limitée ZWO de 2 ans\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44967386022173,"sku":"ZWO-CH4","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ZWO-20nm-CH4-Methane-Filter-1-25-inch-1__16094.1596910046.1280.1280.jpg?v=1684341754"},{"product_id":"lumicon-neutral-density-filter","title":"Lumicon Filtre de Densité Neutre","description":"\u003c!-- more --\u003e\u003ch2\u003e ND13\u003c\/h2\u003e\n\u003cp\u003e Le filtre Lumicon Neutral Density 13 atténuera l'éblouissement de la pleine lune et permettra plus de détails planétaires que jamais ! Le Lumicon ND13 transmet 13 % de toute la lumière incidente, tout en bloquant 87 %. Pour l'observation lunaire avec des télescopes de 8\" (200 mm) et plus.\u003c\/p\u003e\n\u003cp\u003e Les filtres à densité neutre Lumicon sont fabriqués à partir de verre optique de haute qualité et permettent un contraste maximal lors de la visualisation des détails planétaires et lunaires. Meulage de précision individuel, hautement poli avec des revêtements de transmission de lumière maximale des deux côtés.\u003c\/p\u003e\n\u003ch2\u003e ND25\u003c\/h2\u003e \u003cp\u003eLe filtre Lumicon Neutral Density 25 peut augmenter le contraste pour extraire plus de détails sur la lune pleine ou gibbeuse trop brillante et diviser ces étoiles doubles faibles! Lumicon ND25 transmet 25 % de toute la lumière incidente, tout en bloquant 75 %. Pour l'observation lunaire et planétaire avec des télescopes de 5\" (125 mm) et plus.\u003c\/p\u003e\n\u003cp\u003e Les filtres à densité neutre Lumicon sont fabriqués à partir de verre optique renommé Schott et Hoya et permettent un contraste maximal lors de la visualisation des détails planétaires et lunaires. Meulage de précision individuel, hautement poli avec des revêtements de transmission de lumière maximale des deux côtés.\u003c\/p\u003e\n\u003ch2\u003e ND50\u003c\/h2\u003e\n\u003cp\u003e Le filtre Lumicon Neutral Density 50 aidera à révéler les détails subtils du système solaire ! Lumicon ND50 transmet 50 % de toute la lumière incidente, tout en bloquant 50 %. Parfait pour l'observation lunaire et planétaire et la séparation des étoiles doubles.\u003c\/p\u003e\n\u003cp\u003e Les filtres à densité neutre Lumicon sont fabriqués à partir de verre optique de haute qualité et permettent un contraste et des détails maximum. Meulage de précision individuel, hautement poli avec des revêtements de transmission de lumière maximale des deux côtés.\u003c\/p\u003e","brand":"Lumicon","offers":[{"title":"1.25\" \/ 13","offer_id":44967494484253,"sku":"LUM-LF1080","price":82.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" \/ 25","offer_id":44967494517021,"sku":"LUM-LF1085","price":82.0,"currency_code":"CAD","in_stock":false},{"title":"1.25\" \/ 50","offer_id":44967494549789,"sku":"LUM-LF1090","price":82.0,"currency_code":"CAD","in_stock":false},{"title":"2\" \/ 13","offer_id":44967494582557,"sku":"LUM-LF2080","price":85.0,"currency_code":"CAD","in_stock":false},{"title":"2\" \/ 25","offer_id":44967494615325,"sku":"LUM-LF2085","price":85.0,"currency_code":"CAD","in_stock":false},{"title":"2\" \/ 50","offer_id":44967494648093,"sku":"LUM-LF2090","price":85.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lumicon-Neutral-Density-Filter-ND13-1-25-inch__27867.1597638221.1280.1280.jpg?v=1684342951"},{"product_id":"lunt-polarizing-filter","title":"Lunt Filtre Polarisant","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eUn filtre polarisant aidera à contrôler la luminosité de l'image du soleil lors de l'utilisation visuelle d'un Lunt White Light Wedge.\u003c\/li\u003e\n\n\u003cli\u003eChoisissez un filtre polarisant de 1,25″ ou 2″, selon la taille qui correspond au canon de votre oculaire.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e \u003cp\u003e\u003cspan\u003eLorsque vous effectuez un travail visuel avec Lunt White Light Wedges, nous vous recommandons d'ajouter un filtre polarisant pour une visualisation plus confortable. Nous proposons des filtres polarisants de 1,25″ et 2″. Choisissez celui qui correspond à la taille du corps de votre White Light Wedge. Vissez simplement le filtre sur le canon de votre oculaire, puis ajustez la luminosité de la scène en faisant tourner le filtre le plus haut.\u003c\/span\u003e\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"1.25\"","offer_id":44967534756125,"sku":"LSS-PF-1.25","price":36.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":44967534788893,"sku":"LSS-PF-2","price":45.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Polarizing-Filter__02772.1598228937.1280.1280.jpg?v=1684343613"},{"product_id":"apm-nd-3-0-filter-1-25","title":"APM Filtre ND 3.0 - 1.25\"","description":"\u003c!-- more --\u003e \u003cb\u003eFiltre Gris ND 3,0 (1000x) 0,1% 1,25''\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e \u003cb\u003eApplications\u003cbr\u003e\u003cbr\u003e\u003c\/b\u003e Ce filtre sera utilisé dans un Herschel Wedge, pour réduire la lumière transmise à une quantité utilisable. De plus, vous avez besoin d'un deuxième filtre gris ou d'un filtre polaire ou d'un filtre Solar Continuum.\u003cbr\u003e\u003cbr\u003e \u003cb\u003eAdaptation\u003cbr\u003e\u003cbr\u003e\u003c\/b\u003e Les filtres sont simplement vissés dans le filetage de filtre de 1,25\" de l'oculaire ou de l'adaptateur de caméra. Le filtre est également disponible en 2\".\u003cbr\u003e\u003cbr\u003e \u003cb\u003eTransmission\u003cbr\u003e\u003cbr\u003e\u003c\/b\u003e Plus le pourcentage de transmission lumineuse est faible, plus le filtre est puissant. Par exemple un filtre à 0,1% laissera passer 1\/1000 de la lumière, tandis que le reste sera bloqué.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e \u003cb\u003e\u003cu\u003eLa livraison contient :\u003c\/u\u003e\u003cbr\u003e\u003c\/b\u003e\u003cul\u003e\n\n\u003cli\u003eFiltre Gris ND3.0 1.25\" \u003c\/li\u003e\n\n\u003cli\u003eBoite en plastique\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\n\u003cp data-custom-tab-title\u003eCaractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv\u003e\u003cb\u003eMatériau du boîtier :\u003c\/b\u003e\u003c\/div\u003e\n\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv\u003e\u003cb\u003eType de filtre :\u003c\/b\u003e\u003c\/div\u003e\n\n\u003cdiv\u003eFiltre gris ND3.0\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv\u003e\u003cb\u003eFil de filtre :\u003c\/b\u003e\u003c\/div\u003e\n\n\u003cdiv\u003e1,25\" \/ 28,5 mm Filetage des deux côtés\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv\u003e\u003cb\u003eDensité:\u003c\/b\u003e\u003c\/div\u003e\n\n\u003cdiv\u003eND 3.0\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n \u003cdiv\u003e\n\n\u003cdiv\u003e\u003cb\u003eFil de connexion :\u003c\/b\u003e\u003c\/div\u003e\n\n\u003cdiv\u003eM 28,5 mm des deux côtés\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967663927581,"sku":"APM-ND3.0-125","price":29.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/APM-ND-3-0-Filter-1-25-inch-1__99441.1600124038.1280.1280.jpg?v=1684345451"},{"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-u-venus-filter-1-25","title":"Antlia Filtre U-Venus - 1.25\"","description":"\u003c!-- more --\u003e \nLe filtre Antlia Venus-U est conçu pour imager la structure nuageuse de Vénus et Jupiter avec des caméras CCD sur un télescope. Les détails des nuages ​​se reflètent principalement dans la bande ultraviolette qui ne peut normalement pas être visualisée à l'aide de filtres à large bande. Le filtre Venus-U utilise la dernière technologie de revêtement d'interférence diélectrique pour atteindre une efficacité de transmission élevée et une isolation exceptionnelle des bandes passantes UV critiques. Le filtre bloque efficacement les fréquences dommageables au contraste au-delà de 400 nm qui submergent généralement les détails des nuages ​​ultraviolets sur les capteurs de la caméra. Comme les filtres Antlia LRGB de la plus haute qualité, le filtre U-Venus minimise les halos autour des étoiles brillantes et augmente le contraste.\u003cbr\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eRecommandations pour l'utilisation de ce filtre :\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e 1. Lorsque le filtre U-Venus est utilisé avec une caméra planétaire, il est recommandé de retirer toute fenêtre de protection UV-IR devant une caméra planétaire couleur car ce filtre peut atténuer la transmission de la bande ultraviolette critique qui contient les détails des nuages.\u003c\/p\u003e\n\n \u003cp\u003e2. Plus la fréquence dans la bande UV est basse, plus l'exposition sera longue pour obtenir un signal suffisant dans votre image. La sensibilité de la plupart des capteurs diminue également rapidement aux longueurs d’onde UV plus courtes.\u003c\/p\u003e\n\n\u003cp\u003e 3. Il convient de noter que lors de l'utilisation d'un reflex numérique pour photographier des fleurs ultraviolettes, l'appareil photo doit être spécialement modifié pour retirer le filtre anti-infrarouge à l'intérieur de l'appareil photo.\u003c\/p\u003e\n\n\u003cp\u003e 4. En utilisation non astronomique, les conditions d'éclairage peuvent bloquer les transmissions UV, par exemple le contenu UV de l'émission du flash électronique, en raison d'une combinaison d'émission plus faible à des longueurs d'onde plus courtes et d'une absorption accrue par le verre du tube flash. Ces facteurs se combinent pour nécessiter un temps d'exposition considérablement accru (pour les sources UV continues), une intensité UV et une sensibilité ISO à mesure que la longueur d'onde diminue.\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eApplications non astronomiques :\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e Utilisation pour la photographie UV générale (fleurs, santé des plantes, insectes, médecine légale et imagerie médicale)\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eDonnées techniques:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e substrat optique\u003c\/p\u003e\n\n \u003cp\u003eÉpaisseur : 1,25\" monté (2 mm+\/-0,05 mm)\u003c\/p\u003e\n\n\u003cp\u003e Qualité de surface : 60\/40 (voir MIL-O-13830)\u003c\/p\u003e\n\n\u003cp\u003e 2 côtés finement polis optiquement pour garantir un front d'onde précis de 1\/4\u003c\/p\u003e\n\n\u003cp\u003e parallélisme de 30 arcsec\u003c\/p\u003e\n\n\u003cp\u003e Tave\u0026gt;80 %\u003c\/p\u003e\n\n\u003cp\u003e OD3（＞0,001）@ 200-1050nm\u003c\/p\u003e\n\n\u003cp\u003e Multi-revêtement diélectrique 2 faces\u003c\/p\u003e\n\n\u003cp\u003e Support simple \/ non collé\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003eBague filtrante :\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e 1,25\"(M28,5*0,6)\u003c\/p\u003e\n\n\u003cp\u003e Cellule filtrante ultra fine pour minimiser le vignettage en maximisant l'ouverture claire possible\u003c\/p\u003e\n\n\u003cp\u003e Finition anodisée noire\u003c\/p\u003e\n\n\u003cp\u003e Gravure au laser sans décoloration\u003c\/p\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eRemarques:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cspan\u003e1.L'utilisation du filtre pour des observations visuelles est impossible en raison de l'insensibilité de l'œil à cette gamme spectrale (UV).\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cspan\u003e2. Ce filtre ne doit PAS être utilisé pour les observations visuelles, en particulier le soleil ou les sources de lumière UV.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45078062792989,"sku":"ANT-UVENUS","price":283.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-U-Venus.jpg?v=1685815618"},{"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":"dav-cf-1-25","title":"David Astro Planetary Color Filter Kit with Case - 1.25\"","description":"\u003c!-- more --\u003e\n\u003cul\u003e\n\u003cli\u003eFilter No.12\u003c\/li\u003e\n\u003cli\u003eFilter No.21\u003c\/li\u003e\n\u003cli\u003eFilter No.23A\u003c\/li\u003e\n\u003cli\u003eFilter No.56\u003c\/li\u003e\n\u003cli\u003eFilter No.82\u003c\/li\u003e\n\u003cli\u003eMoon \u0026amp; Sky filter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"David Astro","offers":[{"title":"Default Title","offer_id":49171614204189,"sku":"DAV-CF-1.25","price":48.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/DAV-CF-125.jpg?v=1729718830"},{"product_id":"david-astro-variable-polarizing-filter-1-25","title":"David Astro Variable Polarizing Filter - 1.25\"","description":"\u003c!-- more --\u003e\u003cp\u003eThe \u003cstrong\u003eVariable Polarizing Filter\u003c\/strong\u003e is an essential tool for astronomical observing, designed to enhance your viewing experience by reducing glare and controlling brightness. This adjustable filter allows you to fine-tune the amount of light entering your eyepiece, making it ideal for observing the Moon, planets, and bright stars without overwhelming glare.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Light Transmission\u003c\/strong\u003e: Allows continuous control over light levels from 1% to 40%, perfect for adapting to various brightness conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Contrast\u003c\/strong\u003e: Reduces glare and enhances detail, especially for lunar and planetary observations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to Use\u003c\/strong\u003e: Simple twist mechanism lets you adjust the filter’s density on the fly without removing it from the eyepiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality Optics\u003c\/strong\u003e: Made from precision glass for clear, distortion-free viewing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Compatibility\u003c\/strong\u003e: Fits standard telescope eyepieces, ensuring broad usability across different setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether you're reducing the brightness of a full Moon or bringing out fine details on planets, the Variable Polarizing Filter provides better control and comfort during your stargazing sessions.\u003c\/p\u003e","brand":"David Astro","offers":[{"title":"Default Title","offer_id":49179007811869,"sku":"DAV-VPOL-1.25","price":28.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/DAV-VPOL-1.25_5a5f6bb7-07fe-467c-9a4f-5eacf9b56757.jpg?v=1726771715"},{"product_id":"antlia-ch4-methane-filter-1-25","title":"Antlia CH4 Methane Filter - 1.25\"","description":"\u003c!-- more --\u003e\u003cp\u003eAntlia methane (CH4) filter is a specialized filter that allows light in the near infrared portion of the spectrum centered at 889nm to pass through with a bandpass that is 20nm wide. This filter was developed in order to measure finer details and more contrast of the methane that is characteristic of Jupiter, Mars, Saturn and other planets.\u003cbr\u003eThe human eye is not sensitive to light beyond about 700nm hence no person can see what is transmitted by this filter, so this filter is not suitable for visual applications.\u003c\/p\u003e\n\u003cp\u003eThe Methane (CH4) filter is recommended for planetary imaging such like Mars, Jupiter, Saturn and the other planets.\u003cbr\u003eIn order to produce good results, you are likely to require relatively longer exposures times and larger aperture telescope with this filter than with other filters.\u003c\/p\u003e\n\u003cp\u003eTechnical Data:\u003cbr\u003eoptical substrate\u003cbr\u003eThickness: 1.25” (2mm+\/-0.05mm)\u003cbr\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003cbr\u003e2 sides fine-optically polished to ensure accurate 1\/4 wavefront\u003cbr\u003e30 arcsec parallelism\u003cbr\u003eCenter-Wavelength of Antlia CH4 filter: 889nm\u003cbr\u003eTave＞90% , 90% transmission at 889nm\u003cbr\u003eOD5（0.001%）@ 200-1050nm\u003cbr\u003e2 sides Multi-layers anti-reflection coating\u003cbr\u003eSingle \/ Non-glued substrate\u003c\/p\u003e\n","brand":"Antlia","offers":[{"title":"Default Title","offer_id":50257849975069,"sku":"ANT-CH4","price":236.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ABUIABACGAAgsuPZ_AUovoD4vQIwoAY4oAY.jpg?v=1755106117"},{"product_id":"optolong-variable-polarizing-filter","title":"Optolong Variable Polarizing Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eContinuously Variable Light Transmission\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" Barrel Sizes\u003c\/li\u003e\n\u003cli\u003eIdeal for Lunar, Planetary, and Terrestrial Viewing\u003c\/li\u003e\n\u003cli\u003eReduces Glare and Enhances Contrast\u003c\/li\u003e\n\u003cli\u003eDurable CNC-Machined Metal Cell\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\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 Variable Polarizing Filter\u003c\/h2\u003e\n\u003cp\u003eAvailable in both 1.25\" and 2\" barrel sizes, the Optolong Variable Polarizing Filter allows you to continuously adjust image brightness, providing precise glare control on the Moon and bright planets by simply rotating the filter housing.\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\u003eFine-Tune Brightness on the Moon, Venus, and More\u003c\/h3\u003e\n\u003cp\u003eUnlike a standard, fixed-transmission Moon filter, a variable polarizer acts like a dimmer switch for your eyepiece. By rotating the top half of the two-piece filter, you can dial in the perfect amount of light attenuation for any target. This allows you to apply maximum filtering to reduce the overwhelming glare of a full Moon, then back it off to preserve detail on a delicate crescent Moon or when observing Venus.\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\u003eBeyond Astronomy: Cutting Glare in Terrestrial Viewing\u003c\/h3\u003e\n\u003cp\u003eThis filter's utility extends to daytime terrestrial observation and photography. Just like a polarizing filter on a DSLR camera, the Optolong Variable Polarizer enhances views by cutting through reflected glare. When observing over water or through atmospheric haze, a simple turn of the filter can dramatically increase contrast and make distant details pop.\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\u003eSchott Glass Construction in a CNC-Machined Cell\u003c\/h3\u003e\n\u003cp\u003eOptolong builds this filter with high-quality Schott glass, which is then multi-coated using an ion-assisted deposition process. This technique ensures the coatings are durable, scratch-resistant, and optically stable. The filter cell is CNC-machined from lightweight, strong metal, then sand-blasted and black-anodized for maximum durability and stray light control. The result is a slim, robust filter that won't vignette and is built to last.\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\u003eVariable Polarizer vs. Fixed Moon Filter: The Key Difference\u003c\/h3\u003e\n\u003cp\u003eA standard Moon filter is a single piece of neutral density glass with a fixed transmission percentage. It works, but it's a one-size-fits-all solution. A variable polarizing filter offers critical flexibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Moon Filter:\u003c\/strong\u003e Provides one level of brightness reduction. May be too dark for a crescent Moon or not dark enough for a full Moon at high power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptolong Variable Polarizer:\u003c\/strong\u003e Lets you set the brightness precisely for the target, your telescope's aperture, and the current seeing conditions, ensuring you never over- or under-dim the view.\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 do I adjust the brightness with the Optolong Variable Polarizing Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSimply thread the filter onto a 1.25\" or 2\" eyepiece or accessory. Then, while looking through the eyepiece, slowly rotate the top ring of the filter. You will see the image brightness change, allowing you to set the most comfortable and detailed view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the main advantage of the Optolong Variable Polarizing Filter over a standard Moon filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe key advantage is \u003cstrong\u003eflexibility\u003c\/strong\u003e. A standard Moon filter has a fixed light reduction (e.g., 25% or 13% transmission). The Optolong Variable Polarizing Filter allows you to continuously adjust the brightness, making it adaptable to any lunar phase, planet, or even daytime terrestrial viewing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Optolong Variable Polarizing Filter for observing the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolutely not.\u003c\/strong\u003e The Optolong Variable Polarizing Filter is \u003cstrong\u003eNOT a solar filter\u003c\/strong\u003e and is not designed for direct solar observation. Attempting to view the Sun with this filter will cause immediate and permanent eye damage and will destroy your equipment. Only use certified solar filters for solar viewing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Optolong Variable Polarizing Filter improve views of the Moon through my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent tool for an 8\" SCT. The large aperture of your telescope gathers a great deal of light, making the Moon uncomfortably bright. The Optolong Variable Polarizing Filter allows you to reduce the glare to a comfortable level, which increases contrast and makes it easier to see fine details like rilles, crater walls, and maria.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Optolong Variable Polarizing Filter work for daytime, terrestrial viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor terrestrial use, the Optolong Variable Polarizing Filter cuts down on polarized, reflected light. This is especially effective for reducing glare from water, glass, or wet surfaces. By rotating the filter, you can darken the sky, enhance the color of foliage, and see through reflections, improving overall image contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm trying to photograph a waterfall with my telescope; will the Optolong Variable Polarizing Filter help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. When used for terrestrial photography, the Optolong Variable Polarizing Filter will reduce the harsh glare off the water's surface and wet rocks. This will allow your camera to capture more saturated colors and detail that would otherwise be washed out by reflections.\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\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" Round Mounted, 2\" Round Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Material\u003c\/td\u003e\n\u003ctd\u003eSchott Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eMulti-coated with ion-assisted deposition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Material\u003c\/td\u003e\n\u003ctd\u003eCNC Machined, Anodized Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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\" Round Mounted","offer_id":50344085651741,"sku":"OPT-12501","price":52.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":50344085684509,"sku":"OPT-12502","price":64.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/optolong-variable-polarising-filter-2-inch-237882_700x700_jpg.webp?v=1757631904"},{"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-moon-filter","title":"SVBONY Moon Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces glare for comfortable lunar and planetary observing\u003c\/li\u003e\n\u003cli\u003eFits any standard 1.25\" eyepiece or accessory\u003c\/li\u003e\n\u003cli\u003eStandard M28.5x0.6 filter threads\u003c\/li\u003e\n\u003cli\u003eEnhances contrast on bright celestial objects\u003c\/li\u003e\n\u003cli\u003eConstructed with a 1.85mm thick optical glass substrate\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 1.25\" Moon Filter\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY 1.25\" Moon Filter is an essential accessory for observing bright celestial objects, built on a 1.85mm glass substrate to ensure optical flatness. It threads directly into any standard 1.25\" eyepiece with its M28.5x0.6 threads, dimming the overwhelming glare of the Moon to reveal subtle surface detail. This filter improves contrast not just on the Moon, but on bright planets as well.\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\u003eReduce Glare with a 1.85mm Contrast-Boosting Filter\u003c\/h3\u003e\n\u003cp\u003eViewing the Moon, especially during its brighter phases, can be uncomfortably dazzling and wash out fine details. This filter reduces the overall brightness, acting like sunglasses for your telescope, which allows your eye to relax and perceive more subtle features like crater rays, rilles, and variations in mare composition. The 1.85mm thick optical glass is designed as a multi-bandpass filter that also helps darken the sky background, increasing the contrast between your target and the surrounding space.\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\u003eUniversal Fit: M28.5x0.6 Threads for 1.25\" Eyepieces\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum compatibility, the SVBONY Moon Filter features standard M28.5x0.6 threads. This ensures it can be screwed directly onto the barrel of any 1.25\" eyepiece, diagonal, or camera nosepiece. The durable, anodized metal housing protects the glass element, and its low-profile design allows it to be stacked with other filters, such as a color filter for planetary observation, to further isolate specific details.\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 is the primary purpose of the SVBONY 1.25\" Moon Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the SVBONY 1.25\" Moon Filter is to reduce the intense glare from the Moon, making observation more comfortable and revealing finer surface details that are otherwise washed out by the brightness. It also enhances contrast on bright planets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY 1.25\" Moon Filter on planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While designed for the Moon, the SVBONY 1.25\" filter's glare-reducing properties are also effective for observing bright planets. It can help cut through the brightness of Jupiter and Venus, making it easier to see subtle cloud bands or phase details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SVBONY 1.25\" Moon Filter to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter is not attached to the telescope itself, but to your 1.25\" eyepiece or accessory. Simply screw the filter into the M28.5x0.6 threads on the bottom of your eyepiece barrel before inserting the eyepiece into the focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY 1.25\" Moon Filter help with city light pollution?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe source description notes it helps darken the sky background by filtering some wavelengths from man-made lighting. While it is not a dedicated deep-sky light pollution filter (like a UHC or CLS), it can provide a modest improvement in contrast on brighter objects observed from suburban skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this SVBONY filter compatible with a 2\" eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this specific model is the 1.25\" version with M28.5x0.6 threads and will not fit a 2\" eyepiece. SVBONY also manufactures a 2\" version (with M48x0.75 threads) for observers using larger format eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY 1.25\" Moon Filter for imaging the Moon with my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's very useful for lunar imaging. The Moon is bright enough to saturate camera sensors with very short exposures. Using the SVBONY 1.25\" Moon Filter allows you to use longer, more manageable exposure times, which can reduce noise and prevent blowing out highlights in bright areas like the crater Tycho.\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\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\u003eAvailable Models\u003c\/td\u003e\n\u003ctd\u003eF9114A (1.25\"), F9114L (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eM28.5x0.6 (1.25\"), M48x0.75 (2\")\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\"\u003eSVBONY 1.25\" Moon 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\"\u003ePlastic Protective 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":52861233299741,"sku":"SV-F9114L","price":16.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":52861233332509,"sku":"SV-F9114A","price":20.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25-Moon-Filter-Reduce-Glare-Optical-Glass-for-Telescope-1_d0fe9cfa-567e-4225-93aa-85aa17ec3b02.jpg?v=1788659999"},{"product_id":"svbony-sv155-7-piece-telescope-filter-set-125in","title":"SVBONY SV155 7-Piece Telescope Filter Set - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e7-Piece Filter Set\u003c\/li\u003e\n\u003cli\u003eIncludes Moon, CPL, and 5 Color Filters\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch Barrel Size\u003c\/li\u003e\n\u003cli\u003eM28.5*0.6 Filter Threads\u003c\/li\u003e\n\u003cli\u003e2mm Thick Optical Glass\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 SV155 1.25 inch 7-Piece Telescope Filter Set\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV155 7-piece filter set equips your 1.25-inch eyepieces for detailed lunar and planetary observation. This kit includes 7 essential filters—a Moon filter, a Circular Polarizing (CPL) filter, and 5 distinct color filters—all constructed from 2mm thick optical glass. Each filter threads directly into any standard 1.25-inch eyepiece with M28.5*0.6 threads, providing an immediate and noticeable boost in contrast on specific celestial targets.\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 7-Piece Set for Lunar and Planetary Contrast\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive kit is designed as a powerful starter pack for visual observers. The 7 filters provide the tools needed to manage the overwhelming brightness of the Moon and to selectively enhance subtle details on the planets, which are often washed out by atmospheric turbulence or the planet's own brightness. Instead of a single, generic filter, you get a specialized selection to tackle specific observational challenges.\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\u003eCPL \u0026amp; Moon Filters: Cutting Glare on Bright Targets\u003c\/h3\u003e\n\u003cp\u003eObserving the Moon without a filter can be uncomfortably bright, causing your pupil to constrict and hiding faint surface features. The included Moon filter acts like a pair of sunglasses for your telescope, reducing overall brightness to reveal subtle rilles, crater walls, and mare textures. The CPL filter goes a step further by specifically blocking polarized light, which dramatically increases contrast not only on the Moon but also on planetary surfaces and atmospheres.\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\u003e5 Planetary Color Filters: Isolating Specific Surface Details\u003c\/h3\u003e\n\u003cp\u003eColor filters work by blocking certain wavelengths of light, which makes features of a complementary color stand out more clearly. This is a classic technique for bringing out faint details on planets that are otherwise invisible. The SV155 set includes five of the most useful planetary filters for visual work.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e#23A Bright Red:\u003c\/strong\u003e Sharpens boundaries of Mars' polar ice caps and enhances surface details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e#21 Orange:\u003c\/strong\u003e Increases contrast in Jupiter's cloud belts and helps reveal the Great Red Spot. Also useful for sharpening details on Mars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e#12 Yellow:\u003c\/strong\u003e Brings out reddish and orange features on Jupiter and Saturn, and enhances crater details on the Moon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e#56 Bright Green:\u003c\/strong\u003e Enhances the view of ice fogs on Mars and improves contrast within Saturn's ring system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e#82A Bright Blue:\u003c\/strong\u003e Accentuates atmospheric details, like the cloud belts and zones on Jupiter and Saturn.\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\u003eUniversal 1.25\" Fit with M28.5*0.6 Threads\u003c\/h3\u003e\n\u003cp\u003eEach of the 7 filters in the SV155 set is housed in a durable aluminum alloy cell and features standard M28.5*0.6 threads. This ensures compatibility with virtually any 1.25-inch (31.7mm) telescope eyepiece, filter wheel, or camera nosepiece on the market. The 2mm thick optical glass is ground and polished to maintain the integrity of your optical train, ensuring you see planetary details without added distortion.\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 is the main purpose of the SVBONY SV155 7-piece filter set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV155 set is designed for visual observers to enhance contrast and detail on the Moon and planets. The \u003cstrong\u003eMoon and CPL filters\u003c\/strong\u003e reduce glare from bright objects, while the \u003cstrong\u003efive color filters\u003c\/strong\u003e selectively block parts of the light spectrum to make specific features, like Jupiter's cloud bands or Mars' polar caps, easier to see.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich filter from the SV155 set is best for viewing Jupiter's Great Red Spot?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e#21 Orange filter\u003c\/strong\u003e is the most effective in the SV155 set for enhancing Jupiter's Great Red Spot. It increases the contrast between the reddish spot and the surrounding lighter cloud zones. The \u003cstrong\u003e#82A Bright Blue filter\u003c\/strong\u003e is also useful for highlighting the boundaries of Jupiter's belts and zones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CPL filter in the SV155 set differ from the Moon filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eMoon filter\u003c\/strong\u003e is a neutral density filter; it reduces the brightness of all colors of light equally, acting like sunglasses to make viewing more comfortable. The \u003cstrong\u003eCPL (Circular Polarizing) filter\u003c\/strong\u003e specifically blocks polarized light, which is often reflected glare. This not only reduces brightness but can also significantly increase surface contrast, making it useful for planets as well as the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV155 filters fit my telescope's 1.25\" eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The SVBONY SV155 filters feature standard \u003cstrong\u003eM28.5*0.6 threads\u003c\/strong\u003e and are designed for a \u003cstrong\u003e1.25-inch (31.7mm)\u003c\/strong\u003e barrel. They will screw directly into the base of almost any 1.25-inch eyepiece, regardless of the telescope brand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy are there five different colors in the SV155 filter set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDifferent colors are used to highlight specific features on different planets. A filter works by passing its own color while blocking others, which increases the contrast of features that have a complementary color. For example:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA \u003cstrong\u003ered filter\u003c\/strong\u003e helps see surface features on Mars.\u003c\/li\u003e\n\u003cli\u003eA \u003cstrong\u003eblue filter\u003c\/strong\u003e helps see atmospheric clouds on Jupiter and Saturn.\u003c\/li\u003e\n\u003cli\u003eAn \u003cstrong\u003eorange filter\u003c\/strong\u003e helps see details within Jupiter's belts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the SVBONY SV155 filters made of glass or plastic?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV155 filters are made with \u003cstrong\u003e2mm thick optical glass\u003c\/strong\u003e lenses set in anodized aluminum alloy frames for durability and clear, distortion-free views.\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\u003eColor Filter, Moon Filter, CPL Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1.25\" (31.7mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Thickness\u003c\/td\u003e\n\u003ctd\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Quality\u003c\/td\u003e\n\u003ctd\u003eGood\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861234446621,"sku":"SV-F9135A","price":38.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV155-1-25-inch-7-Piece-Filters-Set-for-Moon-Viewing-Telescope-Filter-1_9ad2a52d-c2c9-4f1e-9fdd-354f1685e58f.jpg?v=1788660045"},{"product_id":"svbony-sv128-variable-polarizing-filter","title":"SVBONY SV128 Variable Polarizing Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" barrel sizes\u003c\/li\u003e\n\u003cli\u003eContinuously variable light transmission\u003c\/li\u003e\n\u003cli\u003eReduces glare for enhanced lunar and planetary contrast\u003c\/li\u003e\n\u003cli\u003eConstructed with optical glass lenses\u003c\/li\u003e\n\u003cli\u003eHoused in a durable aluminum frame\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 SV128 1.25\"\/2\" Variable Polarizing Filter\u003c\/h2\u003e\n      \u003cp\u003eThe SVBONY SV128 Variable Polarizing Filter, available in standard 1.25-inch and 2-inch formats, gives you direct, continuous control over image brightness. By rotating the filter housing, you smoothly adjust the light transmission to dial in the perfect view, making it an essential tool for reducing overwhelming glare from the Moon and bright planets through any 1.25\" or 2\" eyepiece.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eFine-Tune Lunar \u0026amp; Planetary Views: Glare Control for 1.25\" \u0026amp; 2\" Setups\u003c\/h3\u003e\n      \u003cp\u003eA full Moon viewed through a telescope can be uncomfortably bright, washing out subtle details like crater rays and rilles. The SV128 Variable Polarizing Filter acts like a dimmer switch for your eyepiece, allowing you to reduce the Moon's glare to a comfortable level. This enhances contrast, revealing fine surface features that are otherwise lost in the brightness.\u003c\/p\u003e\n       \u003cp\u003eThis level of control is also critical for observing bright planets like Venus and Jupiter. By toning down their intensity, you can more easily resolve cloud bands, the Great Red Spot, or the phases of Venus. The filter consists of two polarizing elements; rotating one relative to the other adjusts the degree of light reduction to match your target and viewing conditions.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eDurable Construction: Optical Glass in an Aluminum Frame\u003c\/h3\u003e\n      \u003cp\u003eThe SV128 filter is built with optical glass lenses set in a sturdy aluminum frame, ensuring image clarity and long-term durability. The standard filter threads allow for quick and easy attachment to any standard 1.25-inch or 2-inch eyepiece or accessory.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOptical Glass Lens:\u003c\/strong\u003e Maintains the optical integrity of your telescope, providing clear views with minimal degradation.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAluminum Frame:\u003c\/strong\u003e Provides a robust, non-flexing housing for the optics and smooth rotation for adjustment.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCompatibility Note:\u003c\/strong\u003e Due to its thickness, this polarizing filter is not suitable for use in thin filter drawers like the SVBONY SV226.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV128 Variable Polarizing Filter work?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe SV128 filter uses \u003cstrong\u003etwo high-quality polarizing glass elements\u003c\/strong\u003e. As you rotate the filter housing, the alignment of these two elements changes, which controls the amount of light that can pass through. This allows for a smooth, continuous adjustment of brightness, unlike fixed neutral density filters which have a set transmission level.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of the SV128 filter for observing the Moon?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary benefit for lunar observation is \u003cstrong\u003eglare reduction\u003c\/strong\u003e. A bright Moon, especially at phases greater than a quarter, can be dazzling and reduce your eye's dark adaptation. The SV128 allows you to dim the view to a comfortable level, which dramatically increases contrast and makes it easier to see fine details like crater walls, rilles, and mountain ranges along the terminator.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SV128 filter to see more detail on Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Jupiter is another very bright target where a variable polarizer is useful. By slightly reducing its brightness with the SV128, you can better resolve the contrast between its faint cloud bands and zones. This can make features like the Great Red Spot and smaller ovals stand out more clearly, especially in larger aperture telescopes.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich size SV128 filter do I need, 1.25\" or 2\"?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou should choose the filter size that matches the barrel size of your eyepieces. If you primarily use \u003cstrong\u003e1.25-inch eyepieces\u003c\/strong\u003e, select the 1.25\" filter. If you use larger \u003cstrong\u003e2-inch eyepieces\u003c\/strong\u003e for wide-field views, the 2\" filter is the correct choice. The filter threads directly onto the bottom of the eyepiece barrel.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV128 filter compatible with filter wheels?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eGenerally, no. The SV128 is significantly thicker than standard color or nebula filters because of its rotating, dual-element design. It is \u003cstrong\u003etoo thick to fit in most filter wheels or thin filter drawers\u003c\/strong\u003e, such as the SVBONY SV226. It is designed to be threaded directly onto an eyepiece or other accessory.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan the SV128 filter be used for daytime terrestrial viewing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it's very effective for terrestrial use. Just like polarized sunglasses, the SV128 can reduce glare from reflective surfaces like water, sand, or snow. This increases contrast and makes for more comfortable daytime viewing through your telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eVariable Polarizing Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eOptical glass lens, Aluminum Frame\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eSV128 Variable Polarizing 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\"\u003ePlastic 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\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":52861234741533,"sku":"SV-F9147A","price":25.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":52861234774301,"sku":"SV-F9147B","price":27.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV128-1-25-2inch-Variable-Polarizing-Filters-for-Telescope-1-F9147B_dea54dd1-64af-46d4-899b-e9583b1248ca.jpg?v=1788660055"},{"product_id":"svbony-linear-polarizer-filter","title":"SVBONY Linear Polarizer Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces light transmission to a comfortable 13% for lunar viewing\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch barrel size fits most eyepieces and accessories\u003c\/li\u003e\n\u003cli\u003eThreads into any accessory with standard M28.5 x 0.6 filter threads\u003c\/li\u003e\n\u003cli\u003eNeutral-colored optical glass provides true-to-life color fidelity\u003c\/li\u003e\n\u003cli\u003eEnhances contrast on bright planets and the Moon for visual and photographic use\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\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 Linear Polarizer Filter 1.25\"\u003c\/h2\u003e\n      \u003cp\u003eThe Svbony 1.25-inch Linear Polarizer Filter is engineered to dramatically reduce the Moon's overwhelming glare by limiting light transmission to a comfortable 13%. This single filter threads directly into any standard M28.5 x 0.6 eyepiece or accessory, making it an essential tool for revealing fine lunar and planetary detail without straining your eyes.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eReduce Lunar Glare to a Comfortable 13%\u003c\/h3\u003e\n      \u003cp\u003eA full or gibbous Moon viewed through a telescope can be uncomfortably bright, overwhelming your eye and washing out subtle details. This filter transmits just 13% of the incoming light, dimming the view to a perfect level for extended observation. By reducing eye strain, you can spend more time studying crater walls, rilles, and maria without losing your dark adaptation.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eExtended Viewing Comfort:\u003c\/strong\u003e The 13% transmission makes long observing sessions possible without discomfort or after-images.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTrue Color Rendition:\u003c\/strong\u003e Made with neutral-colored optical glass, the filter reduces brightness without altering the Moon's natural grey and brown tones.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n    \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eUniversal Fit: Standard 1.25-inch M28.5 Threads\u003c\/h3\u003e\n      \u003cp\u003eDesigned for maximum compatibility, the Svbony filter features standard M28.5 x 0.6 threads in a 1.25-inch housing. This ensures it will connect securely to the vast majority of 1.25-inch eyepieces, diagonals, and camera nosepieces on the market. By cutting through glare, the filter boosts contrast, making it easier to see subtle details on the Moon and separate cloud bands on bright planets like Jupiter, both visually and for photography.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main purpose of the Svbony 1.25\" Linear Polarizer Filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts primary purpose is to reduce the intense brightness of the Moon, making it more comfortable to observe through a telescope. It transmits only \u003cstrong\u003e13% of the light\u003c\/strong\u003e, which reduces glare and eye strain, and improves the contrast of surface features.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a 13% transmission level good for observing the Moon with the Svbony filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe 13% transmission level is a carefully chosen balance. It's dark enough to cut the painful glare of a near-full Moon in most telescopes, but bright enough to still see fine details clearly. This allows for comfortable, long-duration study of the lunar surface.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony Linear Polarizer Filter for objects other than the Moon?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it is also effective for reducing glare from other bright objects like Venus and Jupiter, helping to reveal subtle cloud details. However, it is a trade-off; because it blocks so much light, it is not suitable for viewing faint deep-sky objects like nebulae or galaxies, which would be rendered invisible.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Svbony filter fit my eyepieces?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIf you have standard \u003cstrong\u003e1.25-inch eyepieces\u003c\/strong\u003e, then yes. The Svbony filter has standard \u003cstrong\u003eM28.5 x 0.6\u003c\/strong\u003e threads, which is the industry standard for 1.25-inch astronomical filters and eyepieces.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this Svbony filter help when imaging Jupiter with my 8\" SCT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIn an 8\" SCT, Jupiter is extremely bright, which can lead to overexposed images and loss of detail. The Svbony 13% filter acts like sunglasses for your camera, reducing the planet's brightness to a more manageable level. This allows you to use longer exposures to reduce atmospheric seeing effects without blowing out the highlights on the planet's cloud bands.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Svbony 1.25\" filter change the color of the Moon or planets?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The filter is made from \u003cstrong\u003eneutral-colored optical glass\u003c\/strong\u003e. It is designed to reduce the brightness across the entire visual spectrum evenly, so you see a dimmer but true-color view without any artificial color cast.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhen observing the lunar terminator with my 100mm refractor, is the Svbony 13% filter still useful?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile the terminator (the line between light and shadow) is less bright than the full disk, a 13% filter can still be very helpful. It enhances contrast by darkening the sky background and reducing scattered light within the telescope, making the shadows along the terminator appear deeper and more defined. This can make low-relief features pop.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\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\u003eLight Transmission\u003c\/td\u003e\n\u003ctd\u003e13%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGlass Type\u003c\/td\u003e\n\u003ctd\u003eNeutral-Colored Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eSvbony 1.25\" Linear Polarizer Filter\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":52861235429661,"sku":"SV-F9165A","price":22.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":52861235462429,"sku":"SV-F9165B","price":17.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Linear-Polarizer-Filters-1_5c6dd808-ea4a-406f-b5e1-0335afad20cf.jpg?v=1788660087"},{"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":"svbony-sv139-nd0-6-neutral-density-moon-filter-125in","title":"SVBONY SV139 ND0.6 Neutral Density Moon Filter - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces lunar glare with a fixed ND0.6 optical density\u003c\/li\u003e\n\u003cli\u003eTransmits a neutral 25% of incoming light\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch barrel fits most eyepieces\u003c\/li\u003e\n\u003cli\u003eMulti-coated optical glass for maximum contrast\u003c\/li\u003e\n\u003cli\u003eDurable anodized aluminum filter cell\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 SV139 1.25-inch ND0.6 Neutral Density Filter\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV139 ND0.6 filter is a fixed-transmission neutral density filter for any standard 1.25-inch eyepiece, designed to reduce overwhelming lunar brightness to comfortable levels. By transmitting a neutral 25% of incoming light, the ND0.6 filter reveals subtle surface details on the Moon, from fine rilles to complex crater walls, without altering its natural color balance.\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\u003eTaming Lunar Glare: The ND0.6 (25% Transmission) Advantage\u003c\/h3\u003e\n\u003cp\u003eObserving the Moon, especially near its full phase, can be uncomfortably bright through a telescope, causing your pupil to contract and washing out fine detail. The SV139 ND0.6 filter cuts this glare by 75%, allowing your eye to relax and perceive significantly more surface contrast. This fixed 25% transmission is an ideal all-purpose reduction for viewing different lunar phases in a wide range of telescope apertures.\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\u003e1.25\" Anodized Aluminum Cell with Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThe SV139 filter is built into a durable, black-anodized aluminum cell that threads directly onto any standard 1.25-inch eyepiece or accessory. The optical glass is fully multi-coated to suppress internal reflections and ghosting, ensuring that the only thing you see is a sharp, high-contrast image of your target. This construction prevents the filter itself from degrading the view it's meant to improve.\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\u003eSV139 ND0.6 vs. Variable Polarizing Filters: Simplicity and Throughput\u003c\/h3\u003e\n\u003cp\u003eA variable polarizing filter offers adjustable brightness, which can be useful for different targets. However, the SVBONY SV139 ND0.6 filter's single-element design provides higher light throughput and fewer internal surfaces for reflections compared to a stacked polarizer. Its simplicity means there's no need to dial in the correct setting—it delivers a consistent 25% transmission for reliable, high-contrast lunar views every time.\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\"\u003eHow does the SVBONY SV139 ND0.6 filter perform on the full Moon in an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt's an excellent match. An 8\" Schmidt-Cassegrain gathers significant light, making the full Moon uncomfortably bright. The \u003cstrong\u003eND0.6\u003c\/strong\u003e filter reduces the glare to a comfortable \u003cstrong\u003e25%\u003c\/strong\u003e, allowing you to see sharp detail along the terminator and within bright ray systems like those of Copernicus and Tycho without dazzling your eye.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV139 filter to see more detail on Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, particularly in larger telescopes. While primarily a lunar filter, the SV139 can reduce the intense brightness of planets like Jupiter and Venus, which can help in discerning subtle features. In an 8\" or larger telescope, cutting the glare can make it easier to pick out faint cloud bands or the Great Red Spot on Jupiter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"ND0.6\" mean for the SVBONY SV139 filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eND0.6\u003c\/strong\u003e refers to an optical density of 0.6. This means the filter transmits 10\u003csup\u003e-0.6\u003c\/sup\u003e, or \u003cstrong\u003e25%\u003c\/strong\u003e, of the light that passes through it. It's a logarithmic scale where ND0.3 is 50% transmission, ND0.6 is 25%, and ND0.9 is 12.5%. The ND0.6 is considered a great medium-level filter for general lunar work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV139 filter change the color of the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. As a \u003cstrong\u003eneutral density\u003c\/strong\u003e filter, the SV139 is engineered to reduce brightness equally across the entire visible spectrum. Unlike color filters (e.g., yellow or blue), it will not impart any tint, preserving the Moon's true grey and white coloration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SVBONY SV139 filter to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter has standard \u003cstrong\u003e1.25-inch filter threads (M28.5x0.6)\u003c\/strong\u003e. You simply screw it into the threaded barrel of any standard 1.25-inch eyepiece. It can also be attached to other 1.25-inch accessories like diagonals or Barlow lenses that accept filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV139 ND0.6 a good choice for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for lunar and bright planetary imaging. It helps prevent the camera sensor from being overexposed by the bright lunar surface or planets. This allows you to use longer exposure times to capture fainter details or lower the camera's gain for reduced noise in your final image.\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Density\u003c\/td\u003e\n\u003ctd\u003eND0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25 in\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\"\u003eSV139 1.25\" ND0.6 Filter\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"1.25\" Round Mounted","offer_id":52861235986717,"sku":"SV-W9108A","price":13.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV139-Telescope-Filter-1-25inch-ND-Neutral-Density-For-Moon-Viewing-1_f7341da8-b200-4c68-9ed6-96d125fb3a9f.jpg?v=1788660179"},{"product_id":"svbony-sv139-nd0-9-neutral-density-moon-filter-125in","title":"SVBONY SV139 ND0.9 Neutral Density Moon Filter - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces lunar brightness by ~87.5% (ND0.9)\u003c\/li\u003e\n\u003cli\u003eFits any standard 1.25-inch eyepiece or accessory\u003c\/li\u003e\n\u003cli\u003eNeutral density filter preserves true color balance\u003c\/li\u003e\n\u003cli\u003eFully multi-coated optics prevent glare and reflections\u003c\/li\u003e\n\u003cli\u003eDurable black-anodized aluminum filter cell\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\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 SV139 1.25-inch ND0.9 Neutral Density Filter\u003c\/h2\u003e\n      \u003cp\u003eThe SVBONY SV139 Telescope Filter provides a specific ND0.9 density, designed to fit any standard 1.25-inch eyepiece. This level of filtration reduces the overwhelming brightness of the Moon by approximately 87.5% (transmitting 12.5% of light), allowing your eye to perceive subtle rilles, crater walls, and ejecta blankets that are normally lost to glare.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eND0.9 Brightness Reduction: Comfortable Lunar Viewing\u003c\/h3\u003e\n      \u003cp\u003eObserving the Moon, especially from the first quarter to full, can be uncomfortably bright through a telescope, causing your pupil to contract and washing out fine detail. The SV139 filter's ND0.9 rating darkens the view to a comfortable level without altering its natural color. This significant 87.5% reduction in brightness (an 8× reduction) is ideal for revealing low-contrast features across lunar maria and highlands.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eMulti-Coated Optics in a 1.25\" Cell: Preserving Contrast\u003c\/h3\u003e\n      \u003cp\u003eWhile designed to reduce light, this filter uses fully multi-coated optical glass to ensure that the light you do see is pristine. These coatings prevent internal reflections between the eyepiece and the filter, which could otherwise reduce contrast and introduce ghosting. The filter is housed in a durable, threaded 1.25-inch aluminum cell for a secure fit on any standard eyepiece or filter wheel.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does ND0.9 mean for the SVBONY SV139 filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eND0.9\u003c\/strong\u003e is a measure of optical density. It means the filter allows approximately 12.5% of the light to pass through it, effectively blocking 87.5% of the incoming light (a 3-stop or 8× reduction). This is a strong level of filtration, ideal for reducing glare from a bright or full Moon for visual observation.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV139 ND filter for observing planets like Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, in larger aperture telescopes (typically 8\" or more), planets like Jupiter and Venus can be bright enough to cause glare that obscures fine detail. The SVBONY SV139 ND0.9 filter helps cut this glare effectively, improving contrast on Jupiter's cloud bands or subtle features on Venus without affecting the planet's natural color.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV139 ND filter affect the color of the Moon?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt doesn't. The \"ND\" in the SVBONY SV139 stands for \u003cstrong\u003eNeutral Density\u003c\/strong\u003e, which means it reduces the intensity of all wavelengths of light equally. This darkens the image without introducing any color cast, so the Moon retains its natural grey and subtle brown tones.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SV139 1.25\" ND filter work with my 8\" Dobsonian telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. The SVBONY SV139 filter has standard 1.25-inch filter threads (M28.5x0.6), which will screw directly into the barrel of any standard 1.25-inch eyepiece you would use with your 8\" Dobsonian. The ND0.9 density is an excellent choice for an 8\" scope, as it provides strong glare reduction for lunar viewing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I use the SVBONY SV139 ND0.9 filter instead of a weaker or stronger one?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe ND0.9 provides an 87.5% light reduction (12.5% transmission), making it ideal for medium-to-large telescopes viewing the Moon near its full phase. An ND0.6 (25% transmission) is better for smaller scopes or early moon phases, while an ND1.2 or ND3.0 provides extreme light reduction for very large apertures.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack the SVBONY SV139 filter with other 1.25\" filters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The SVBONY SV139 filter cell is threaded on both sides. You can stack it with a color filter (like a #80A Blue to enhance contrast on Jupiter) or even another ND filter to create a stronger dimming effect. However, stacking filters can sometimes introduce reflections, so it's best to use the minimum number of filters necessary.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV139\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNeutral Density (ND)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003eND0.9\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLight Transmission\u003c\/td\u003e\n\u003ctd\u003e~12.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eSVBONY SV139 1.25-inch ND0.9 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\"\u003ePlastic 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\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":52861236019485,"sku":"SV-W9108B","price":13.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV139-Telescope-Filter-1-25inch-ND-Neutral-Density-For-Moon-Viewing-1-W9108B_29210557-1fc0-4351-b54b-60152cf50f46.jpg?v=1788660188"},{"product_id":"svbony-sv139-nd1-2-neutral-density-moon-filter-125in","title":"SVBONY SV139 ND1.2 Neutral Density Moon Filter - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces Lunar Glare with ND1.2 Density\u003c\/li\u003e\n\u003cli\u003eTransmits 6.25% of Incoming Light\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch Barrel Threads\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optical Glass\u003c\/li\u003e\n\u003cli\u003eNeutral Color Rendition\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 SV139 1.25-inch ND1.2 Neutral Density Filter\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV139 1.25-inch ND1.2 filter is engineered to transmit just 6.25% of incoming light, cutting the overwhelming glare from the Moon to reveal fine surface detail. By screwing this filter into any standard 1.25-inch eyepiece, you reduce brightness by a factor of sixteen (a 4-stop reduction), making extended observations comfortable and bringing subtle rilles, crater walls, and ejecta blankets into sharp relief without altering the Moon's natural color.\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\u003eND1.2 Density: 6.25% Transmission for Comfortable Lunar Viewing\u003c\/h3\u003e\n\u003cp\u003eObserving the Moon, especially near its full phase, can be uncomfortably bright through a telescope, causing temporary dazzle and washing out delicate contrast. The SV139 filter's fixed ND1.2 density provides a 93.75% reduction in brightness, allowing your eye to relax and perceive the subtle tonal variations across lunar maria and highlands. This level of attenuation is ideal for most small-to-medium aperture telescopes, revealing details that are otherwise lost in the glare.\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\u003eOptical Fidelity in a Standard 1.25-inch Cell\u003c\/h3\u003e\n\u003cp\u003eA filter is useless if it degrades the image. The SV139 uses fully multi-coated optical glass to maximize contrast and prevent internal reflections, ensuring the view remains crisp and clear. The precisely machined aluminum cell features standard 1.25-inch filter threads, guaranteeing compatibility with virtually any 1.25-inch eyepiece or accessory, allowing for quick and secure attachment for both visual observation and astrophotography.\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 \"ND1.2\" mean for the SVBONY SV139 filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eND1.2\u003c\/strong\u003e signifies a Neutral Density filter that allows \u003cstrong\u003e6.25% of light to pass through\u003c\/strong\u003e it (a transmission factor of 10^-1.2). This is equivalent to a 4-stop reduction in exposure for photography and provides a significant, comfortable dimming effect for visual observation of bright objects like the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV139 filter change the color of the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. As a \u003cstrong\u003eneutral\u003c\/strong\u003e density filter, the SV139 is designed to reduce brightness evenly across the entire visible spectrum. It dims the view without introducing any color cast, preserving the natural grey and brown tones of the lunar surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SV139 1.25-inch filter to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter has standard threads on its cell that screw directly into the barrel of any \u003cstrong\u003e1.25-inch eyepiece\u003c\/strong\u003e. You simply thread it onto the bottom of your chosen eyepiece before inserting the eyepiece into the telescope's focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV139 ND1.2 filter dark enough for viewing the full Moon in a 10\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, for most observers, an ND1.2 filter is an excellent choice for a 10\" telescope, providing a major reduction in glare. However, due to the large light-gathering power of the telescope, some observers may prefer an even darker filter (like an ND3.0, 0.1% transmission) or a variable polarizing filter for maximum comfort during the brightest phases of the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV139 filter to view the crescent phase of Venus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. Venus is another extremely bright target where glare can hide its delicate crescent shape. The SV139 ND1.2 filter is very effective at reducing the planet's brightness, making its phase much easier to see clearly. It can also be useful for splitting bright double stars where one component overwhelms the other.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SV139 ND filter for deep-sky objects like nebulae or galaxies?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is not intended for faint deep-sky objects. It is designed to reduce light, which would make faint objects like the Orion Nebula (M42) or the Andromeda Galaxy (M31) completely invisible. For those targets, you need light pollution or narrowband filters that selectively pass light, rather than block it.\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNeutral Density (ND)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDensity\u003c\/td\u003e\n\u003ctd\u003eND1.2 (6.25% Transmission)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25 in\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\"\u003eSV139 1.25-inch ND1.2 Filter\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"1.25\" Round Mounted","offer_id":52861236052253,"sku":"SV-W9108C","price":12.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV139-Telescope-Filter-1-25inch-ND-Neutral-Density-For-Moon-Viewing-1-W9108C_03856145-2a09-4478-ba89-fdd05882474c.jpg?v=1788660197"},{"product_id":"svbony-sv139-nd3-0-neutral-density-moon-filter-125in","title":"SVBONY SV139 ND3.0 Neutral Density Moon Filter - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eND3.0 Neutral Density Filter\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-inch Barrel Size\u003c\/li\u003e\n\u003cli\u003eTransmits 0.1% of Incoming Light (10-Stop \/ 1000× Reduction)\u003c\/li\u003e\n\u003cli\u003eIdeal for Herschel Solar Wedges \u0026amp; Solar Imaging Accessories\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optical Glass in Black Anodized Aluminum Cell\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 SV139 1.25-inch ND3.0 Neutral Density Filter\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV139 1.25-inch ND3.0 Neutral Density filter provides an intense 0.1% light transmission (a 10-stop or 1000× reduction) without altering natural color rendition. This specialized filter threads directly into standard 1.25-inch eyepieces and accessories, serving as an essential light attenuation tool primarily used alongside Herschel solar wedges, dedicated solar setups, and specialized solar imaging rigs.\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\u003eND3.0 Transmission: Safe Light Reduction for Solar Wedges \u0026amp; Imaging\u003c\/h3\u003e\n\u003cp\u003eBecause an ND3.0 filter cuts 99.9% of incoming light, it is far too dark for nighttime lunar or planetary observation. Instead, its core application is downstream solar light control. When paired with a Herschel solar wedge (which reflects 95–96% of sunlight away), the SV139 ND3.0 filter safely steps down the remaining intense beam to a comfortable level for white-light solar viewing of sunspots, granulation, and solar faculae.\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\u003eMulti-Coated Optical Glass in a Standard 1.25\" Cell\u003c\/h3\u003e\n\u003cp\u003eConstructed with high-quality fully multi-coated optical glass, the SV139 minimizes internal reflections and maintains crisp image contrast. The standard 1.25-inch cell features double-sided threads (M28.5 x 0.6mm), allowing you to easily stack it with a Polarizing filter or a solar continuum filter for further light fine-tuning.\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 is the main use for an ND3.0 filter in astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003eND3.0 filter\u003c\/strong\u003e reduces light intensity by 99.9% (transmitting just 0.1%, or a 10-stop reduction). Because it is so dark, it is primarily used in solar observation downstream of a Herschel solar wedge to bring the remaining light down to safe, comfortable visual or photographic levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I look at the Sun using ONLY this ND3.0 filter on my eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eNO. NEVER use an ND3.0 filter alone at the eyepiece for solar viewing.\u003c\/strong\u003e Unfiltered sunlight focused by a telescope aperture will instantly shatter or melt an eyepiece filter and cause permanent blindness. An ND3.0 filter must only be used \u003cem\u003ebehind\u003c\/em\u003e a proper front-aperture solar filter or inside a dedicated Herschel solar wedge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY ND3.0 filter for nighttime viewing of the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, an ND3.0 filter is generally far too dark for nighttime lunar observing. Cutting 99.9% of the light will render the lunar surface dim and difficult to perceive. For visual lunar observing, lighter filters like ND0.6 (25% transmission), ND0.9 (12.5% transmission), or ND1.2 (6.25% transmission) are recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the ND3.0 filter used with a Herschel Solar Wedge?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Herschel wedge dumps ~95% of incoming solar energy out of its heat trap, but the remaining 5% light beam is still too bright for direct human eyes. Threading the ND3.0 filter into the wedge's eyepiece barrel reduces that remaining light by 99.9%, bringing the final view into a safe, comfortable intensity range for white-light solar observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack the SVBONY SV139 ND3.0 with other filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The SV139 aluminum cell features threads on both sides. In solar setups, observers frequently stack an ND3.0 filter with a Variable Polarizer (to fine-tune brightness) or a Solar Continuum filter (to highlight sunspot details and contrast).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SVBONY SV139 filter to my setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter features standard 1.25-inch threads (M28.5 x 0.6mm). It simply threads onto the bottom barrel of any standard 1.25-inch eyepiece, camera nosepiece, or Herschel wedge accessory adapter.\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV139\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNeutral Density (ND)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003eND3.0 (0.1% Transmission \/ 10-Stop)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25 in (M28.5 x 0.6 Thread)\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\"\u003eSVBONY SV139 1.25\" ND3.0 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\"\u003ePlastic 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\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":52861236085021,"sku":"SV-W9108D","price":13.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV139-Telescope-Filter-1-25inch-ND-Neutral-Density-For-Moon-Viewing-1-W9108D_f30713f0-55c3-4128-9cfc-0ce4e0594c16.jpg?v=1788660207"},{"product_id":"explore-scientific-310250","title":"Explore Scientific 2\" Variable Polarizing Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2\" Filter Barrel Size\u003c\/li\u003e\n\u003cli\u003eContinuously Variable Brightness\u003c\/li\u003e\n\u003cli\u003eIdeal for Lunar, Planetary, and Solar Observing\u003c\/li\u003e\n\u003cli\u003eNeutral Gray Color Rendition\u003c\/li\u003e\n\u003cli\u003eStackable with Other 2\" Filters\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\u003e2\" Variable Polarizing Filter\u003c\/h2\u003e\n\u003cp\u003eThe 2\" Variable Polarizing Filter offers continuous brightness adjustment for any 2\" eyepiece, allowing you to dial down intense glare from the Moon and planets. This dual-threaded 2\" filter makes it possible to perfectly tailor the view to your target, revealing fine details that are washed out by excessive light.\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\u003eContinuously Variable Brightness Control for Your 2\" Eyepieces\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed neutral density filters, this 2\" variable polarizer allows you to fine-tune image brightness on the fly. A simple rotation of the filter's two-part housing adjusts the light transmission, giving you precise control to match the viewing conditions and your target's brightness perfectly. The filter provides a neutral gray image, ensuring that colors remain true without any distracting tint.\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\u003eEliminate Glare on the Moon, Planets, and Sun\u003c\/h3\u003e\n\u003cp\u003eBright celestial objects like the full Moon and planets can be so dazzling that they hide subtle surface features. This 2\" filter acts like a dimmer switch for your telescope, reducing glare to reveal lunar rilles, planetary cloud bands, and delicate crater ejecta. It prevents the \"blooming\" effect that washes out high-contrast details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical Solar Safety:\u003c\/strong\u003e For solar viewing, this 2\" filter is an essential tool for managing brightness but must \u003cstrong\u003eonly\u003c\/strong\u003e be used in conjunction with a dedicated, professional-grade solar filter (like a full-aperture white light filter or a Herschel wedge). It is not a standalone solar filter and will not protect your eyes from harmful radiation if used alone.\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\u003eStackable 2\" Design for Advanced Filter Combinations\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum utility, this filter features standard 2\" threads on both sides (internal and external). This design allows you to stack it with other 2\" filters from your collection. You can combine it with a color filter to enhance features on Mars or Jupiter while simultaneously controlling the planet's intense brightness.\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\u003eVariable Polarizer vs. Fixed ND Filters: The Control Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a fixed Neutral Density (ND) filter provides a single level of light reduction, a variable polarizer offers a major advantage in flexibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed ND Filter Advantage:\u003c\/strong\u003e A single ND filter is a simple, set-it-and-forget-it solution for a specific brightness level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Variable Polarizer Advantage:\u003c\/strong\u003e This single filter effectively replaces an entire set of fixed ND filters. You can adjust for changing atmospheric seeing, different eyepiece magnifications, or the varying phases of the Moon without ever needing to swap filters at the eyepiece.\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 do I adjust the brightness with the 2\" Variable Polarizing Filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOperation is simple: thread the 2\" filter onto your eyepiece or accessory, then slowly rotate the filter's housing. As you turn it, you will see the image dim or brighten, allowing you to set the perfect level of light transmission for your target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 2\" Variable Polarizing Filter for looking at the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but \u003cstrong\u003eONLY\u003c\/strong\u003e as a secondary filter. For safe solar viewing, you \u003cstrong\u003eMUST\u003c\/strong\u003e use this polarizing filter in combination with a dedicated, professional-grade, full-aperture solar filter or a Herschel wedge. Never use this filter as the primary or only protection for solar observation, as it does not block harmful UV and IR radiation and will result in permanent eye damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will this 2\" filter improve my view of Jupiter with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn a bright planet like Jupiter, this 2\" filter reduces glare that can wash out subtle details. By dimming the image to a comfortable level, you can more easily see fine cloud bands, the Great Red Spot, and shadow transits of the Galilean moons. The neutral gray tint ensures Jupiter's colors remain true.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 2\" filter useful for observing the full Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The full Moon is bright enough to be uncomfortable and cause temporary flash-blindness, hiding fine details. This 2\" variable filter allows you to dim the view significantly, revealing incredible detail in crater walls, rays, and rilles without being overwhelmed by glare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 2\" Variable Polarizing Filter add any color to the view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The filter is designed to provide a neutral gray filter effect. It reduces brightness across the visual spectrum evenly, so the natural colors of the Moon, planets, and stars remain unchanged.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack this 2\" variable polarizer with other filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The filter features both internal and external 2\" filter threads. This allows you to stack it with other filters, such as a color filter to enhance planetary features or a light pollution filter, giving you combined filtering effects.\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e4007922041025\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\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\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":52909408321821,"sku":"ES-310250","price":252.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ExploreScientific-2-Variable-Polarizing-Filter-1_3f3af942-fd85-4fb0-9bd3-87d547e5b2d8.jpg?v=1789061604"},{"product_id":"player-one-ch4-8nm-1-25-inch-filter-e-series","title":"Player One CH4 8nm Filter E-series - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIsolates the 8nm methane (CH4) absorption band\u003c\/li\u003e\n\u003cli\u003eStandard 1.25″ filter cell format\u003c\/li\u003e\n\u003cli\u003eOptimized for modern CMOS and CCD planetary cameras\u003c\/li\u003e\n\u003cli\u003eE-series features high-quality optical glass and multi-layer coatings\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\u003eCH4 8nm 1.25″ Filter E-series\u003c\/h2\u003e\n\u003cp\u003eThe Player One CH4 8nm 1.25″ E-series Filter isolates the specific methane absorption band, darkening the methane-rich belts of Jupiter and Saturn to dramatically increase the visibility of high-altitude storms and atmospheric features. This E-series filter is built to a higher standard using high-quality optical glass and advanced multi-layer coatings, optimized for the high sensitivity of modern CMOS and CCD sensors.\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\u003eTargeting Gas Giants: The 8nm Methane Bandpass\u003c\/h3\u003e\n\u003cp\u003eMethane gas in the atmospheres of Jupiter and Saturn strongly absorbs sunlight. This filter's narrow 8nm bandpass is centered on this absorption line, making methane-rich areas appear very dark. Features at higher altitudes, above the main methane layers—such as bright equatorial zones and prominent storms like the Great Red Spot—reflect sunlight before it is absorbed and therefore stand out with exceptional contrast.\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\u003eE-Series Optics for CMOS\/CCD Imaging\u003c\/h3\u003e\n\u003cp\u003eThe E-series represents an upgrade in optical manufacturing, designed specifically for astrophotography with modern cameras. Each filter uses a high-quality glass substrate and multi-layer composite coatings to ensure high transmission within the narrow bandpass while suppressing unwanted out-of-band light. This construction minimizes halos and internal reflections, preserving the fine details captured by your sensor.\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\u003ePlayer One E-Series vs. S-Series: An Upgraded Standard\u003c\/h3\u003e\n\u003cp\u003ePlayer One offers two filter lines, and the E-series is the premium option for imagers seeking the best possible results. While the S-series provides excellent value, the E-series is manufactured to a higher standard.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubstrate and Coatings:\u003c\/strong\u003e The E-series employs higher quality optical glass and more advanced multi-layer coating technology than the S-series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Optimization:\u003c\/strong\u003e This upgraded construction is specifically aimed at maximizing the signal-to-noise ratio for sensitive CMOS and CCD cameras.\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 is the primary purpose of the Player One E-series CH4 8nm filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the \u003cstrong\u003ePlayer One CH4 8nm filter\u003c\/strong\u003e is to enhance the contrast of atmospheric features on Jupiter and Saturn. By selectively passing light only in the methane absorption band, it darkens the main cloud belts, making high-altitude phenomena like storms, ovals, and bright zones appear much more prominent in monochrome images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 8nm bandpass on the CH4 filter affect my images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe narrow \u003cstrong\u003e8nm bandpass\u003c\/strong\u003e is a trade-off. It provides very high contrast by rejecting almost all light outside the methane line, but it also significantly dims the image. This requires longer exposure times or higher gain settings, making it best suited for planetary cameras with high sensitivity and low read noise. It is not suitable for visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main difference between the Player One E-series and S-series filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eE-series is an upgraded version of the S-series\u003c\/strong\u003e. According to Player One, the E-series uses a higher quality optical glass substrate and more advanced multi-layer composite coating technology. This results in a filter manufactured to a higher standard, optimized for professional results with modern CMOS and CCD cameras.\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\" E-series CH4 filter for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is designed exclusively for imaging. The 8nm bandpass is extremely restrictive and passes so little light that the image through an eyepiece would be far too dim for the human eye to see any detail. It relies on the ability of a camera sensor to accumulate light over time (long exposures).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the E-series CH4 filter improve my images of Jupiter with a C8 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a Celestron 8\" SCT, the \u003cstrong\u003ePlayer One CH4 filter\u003c\/strong\u003e will allow you to capture a high-contrast map of Jupiter's upper atmosphere. The Great Red Spot, which can sometimes have low contrast in visible light, will appear as a bright, high-altitude feature against the darkened South Equatorial Belt. You will also be able to more clearly define the structure of the bright Equatorial Zone and detect other smaller storms (ovals) that are difficult to resolve in broadband images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Player One CH4 filter useful for imaging Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003eCH4 filter\u003c\/strong\u003e is excellent for Saturn. It enhances the contrast of the planet's own atmospheric belts and zones, similar to its effect on Jupiter. Critically, it also darkens the planet's globe significantly more than the icy rings, which do not contain methane. This makes the rings stand out with brilliant separation from the planet itself, creating a striking and detailed image.\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 (methane CH4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize \/ format\u003c\/td\u003e\n\u003ctd\u003e1.25\" mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounted in a cell\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6 male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral wavelength(s)\u003c\/td\u003e\n\u003ctd\u003e889 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandwidth (FWHM)\u003c\/td\u003e\n\u003ctd\u003e8 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass thickness\u003c\/td\u003e\n\u003ctd\u003e1.85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell height\u003c\/td\u003e\n\u003ctd\u003e7.5 mm (5 mm body + 2.5 mm thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak transmission\u003c\/td\u003e\n\u003ctd\u003e≈90%\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913424957725,"sku":"POA-CH4-125E","price":181.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"ioptron-tfe100","title":"iOptron Green Moon Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnhances contrast on lunar and planetary features\u003c\/li\u003e\n\u003cli\u003eReduces glare for more comfortable viewing\u003c\/li\u003e\n\u003cli\u003eImproves detail in Martian polar caps and dust storms\u003c\/li\u003e\n\u003cli\u003eHighlights cloud structures on Jupiter and Saturn\u003c\/li\u003e\n\u003cli\u003eThreads into standard astronomy eyepieces and accessories\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\u003eGreen Moon Filter\u003c\/h2\u003e\n\u003cp\u003eThe Green Moon Filter is a fundamental tool for visual observers seeking to increase contrast and reduce glare when viewing bright celestial objects. By selectively passing green light, this filter darkens the sky background and enhances specific surface and atmospheric details on the Moon and planets that are often washed out by unfiltered light. It provides a significant improvement in observable detail, making it an essential accessory for any eyepiece collection.\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\u003eEnhancing Lunar Detail: From Bright Maria to Subtle Rilles\u003c\/h3\u003e\n\u003cp\u003eWhen observing the Moon, especially during its brighter phases, overwhelming glare can flatten the view and hide subtle features. The Green Moon Filter dims the image to a more comfortable level while dramatically increasing the contrast between lunar features with different albedos (reflectivity). It excels at separating bright ejecta rays from the surrounding terrain and defining the boundaries of dark maria and the floors of craters.\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\u003ePlanetary Observation: Isolating Features on Mars, Jupiter, and Venus\u003c\/h3\u003e\n\u003cp\u003eBeyond the Moon, the Green Moon Filter is a versatile planetary accessory. On Mars, it improves the visibility of the polar ice caps and highlights surface frost and high-altitude clouds. For Jupiter and Saturn, it boosts the contrast of their atmospheric belts and zones. It's particularly effective at making the Great Red Spot on Jupiter stand out more clearly and can even help in discerning the faint cloud patterns on Venus.\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\u003eGreen vs. Neutral Density: Choosing the Right Filter for the Moon\u003c\/h3\u003e\n\u003cp\u003eObservers often choose between a green filter and a standard neutral density (ND) or \"Moon\" filter. While both reduce brightness, they serve different purposes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeutral Density Filter:\u003c\/strong\u003e This filter reduces brightness uniformly across the entire visual spectrum, like sunglasses for your telescope. It provides a natural color view and is purely for glare reduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreen Moon Filter:\u003c\/strong\u003e This filter provides targeted contrast enhancement by transmitting only a specific portion of the spectrum. While it also reduces glare, its primary function is to make specific red and blue-toned features appear darker, thereby increasing the visibility of subtle details. For detailed study, the green filter is often the superior choice.\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 does the Green Moon Filter do to the view of the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Green Moon Filter increases contrast and reduces overall glare. This makes it easier to see fine details like crater walls, rilles, and the subtle textures of the lunar maria. It gives the Moon a green tint but makes surface features stand out more distinctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Green Moon Filter useful for planets?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is highly effective for several planets. It helps to distinguish the polar caps and dust storms on \u003cstrong\u003eMars\u003c\/strong\u003e, enhances the visibility of the cloud belts and Great Red Spot on \u003cstrong\u003eJupiter\u003c\/strong\u003e, and can reveal faint patterns in the thick atmosphere of \u003cstrong\u003eVenus\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Green Moon Filter improve views of Mars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen observing Mars, the Green Moon Filter is excellent for increasing the contrast of the white polar ice caps against the planet's reddish surface. It also helps in identifying high-altitude atmospheric hazes and localized dust storms, which can be difficult to see 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 Green Moon Filter to see cloud bands on Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Green Moon Filter enhances the boundaries between Jupiter's reddish-brown belts and its lighter zones. It is particularly useful for making the Great Red Spot (GRS) appear more defined and can help resolve smaller, transient storms within the Jovian atmosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Green Moon Filter make the image dimmer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, all color filters reduce the total amount of light reaching your eye. This dimming effect is beneficial as it reduces glare on bright objects like the Moon and planets, making extended observation more comfortable and revealing more detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is a Green Moon Filter different from a variable polarizing filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003eGreen Moon Filter\u003c\/strong\u003e enhances contrast by selectively transmitting green light, which helps specific features stand out. A \u003cstrong\u003evariable polarizing filter\u003c\/strong\u003e is a type of neutral density filter that allows you to adjust the brightness from about 1% to 40% transmission without altering color. The polarizer is for controlling glare, while the green filter is for boosting contrast.\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\u003eColored Glass Filter - Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003eLunar \u0026amp; Planetary Visual Observing\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\"\u003eGreen Moon 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 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\u003cp\u003eNo downloads are available for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWarranty information for this product is not available.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":52917295448349,"sku":"IOP-TFE100","price":20.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-Green-Moon-Filter-1_232402bc-a3c5-4efc-a5d5-fd5c6c38b7bc.jpg?v=1789142198"},{"product_id":"optolong-moon-skyglow-filter","title":"Optolong Moon \u0026 Skyglow Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBlocks over 99% of common light pollution emission lines\u003c\/li\u003e\n\u003cli\u003eMaintains over 90% average transmission for bright, detailed views\u003c\/li\u003e\n\u003cli\u003eλ\/4 transmitted wavefront ensures no image degradation\u003c\/li\u003e\n\u003cli\u003eDurable B270 substrate with 1.85mm thickness\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" mounted sizes\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 Moon \u0026amp; Skyglow Filter\u003c\/h2\u003e\n\u003cp\u003eThe Optolong Moon \u0026amp; Skyglow Filter dramatically improves visual and photographic contrast by blocking over 99% of disruptive artificial light pollution and natural skyglow. By maintaining an average transmission greater than 90% for desirable wavelengths, it darkens the sky background without dimming celestial targets, all while preserving image sharpness with a λ\/4 transmitted wavefront across its 1.85mm thick B270 glass substrate.\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\u003e\u0026gt;99% Light Pollution Rejection with \u0026gt;90% Transmission\u003c\/h3\u003e\n\u003cp\u003eThis filter isolates and rejects the most common sources of light pollution, such as sodium vapor streetlights, darkening the sky background to make faint details visible. With a high transmission rate of over 90% across the visible spectrum, galaxies, nebulae, and star clusters retain their brightness and structure, resulting in a significantly higher-contrast view.\u003c\/p\u003e\n\u003cp\u003eThis balanced approach makes the Moon \u0026amp; Skyglow filter highly versatile. It provides a noticeable improvement from moderately light-polluted skies without the aggressive color shifting of narrowband filters, making it an ideal general-purpose tool for both visual observing and astrophotography.\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\u003eλ\/4 Wavefront Accuracy and Durable B270 Construction\u003c\/h3\u003e\n\u003cp\u003eAn astronomical filter is useless if it degrades the sharp image from your telescope. Optolong constructs the Moon \u0026amp; Skyglow filter from B270 optical glass polished to a λ\/4 transmitted wavefront accuracy and 30s parallelism. These specifications ensure that the filter will not introduce aberrations or distortions, preserving the fine details on planetary surfaces and the pinpoint sharpness of stars.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIon-Assisted Coatings:\u003c\/strong\u003e Precision coatings are applied using an ion-assisted deposition process, ensuring durability, scratch resistance, and stable performance that does not shift with temperature changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60\/40 Surface Quality:\u003c\/strong\u003e This specification controls for cosmetic imperfections, guaranteeing a clean optical surface that won't scatter light or reduce contrast.\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 is the primary purpose of the Optolong Moon \u0026amp; Skyglow filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Optolong Moon \u0026amp; Skyglow filter is a broadband light pollution filter designed to increase the contrast of celestial objects. It selectively blocks common wavelengths of artificial light and natural skyglow, which darkens the sky background and makes faint details on the Moon, planets, galaxies, and nebulae easier to see.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Optolong Moon \u0026amp; Skyglow filter improve my view of the Orion Nebula (M42) from the suburbs?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFrom a suburban location, the skyglow washes out the faint, outer structures of nebulae like M42. The Optolong Moon \u0026amp; Skyglow filter blocks this interfering light, making the sky background appear much darker. This allows the faint nebulosity extending from the core of the Orion Nebula to stand out, revealing more of its intricate dust lanes and structure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Optolong Moon \u0026amp; Skyglow filter effective for planetary viewing in an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it can be beneficial. While planets are bright, they are often observed against a bright sky background, especially at lower altitudes. The filter darkens the sky immediately surrounding the planet, which can increase the perceived contrast of subtle details like Jupiter's cloud bands or Saturn's Cassini Division. It also helps reduce glare when observing the bright lunar surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Optolong Moon \u0026amp; Skyglow filter suitable for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this filter is very effective for astrophotography, particularly with one-shot color cameras. By blocking over 99% of major light pollution sources, it allows for longer sub-exposures before the skyglow saturates the sensor. This results in cleaner images with better contrast and more natural star colors compared to unfiltered shots from a light-polluted area.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the λ\/4 wavefront specification mean for the Optolong Moon \u0026amp; Skyglow filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003eλ\/4 (1\/4 wave)\u003c\/strong\u003e wavefront rating is a measure of optical precision. It guarantees that the filter's glass is flat and parallel enough that it will not distort the light passing through it by more than one-quarter of a wavelength of light. This is critical for high-resolution viewing and imaging, as it ensures the filter will not degrade the sharpness of the image produced by 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 Optolong Moon \u0026amp; Skyglow filter for solar observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eAbsolutely not.\u003c\/strong\u003e This filter is designed for night-sky use only and provides no protection from the Sun's harmful radiation. Looking at the Sun with this filter, or any filter not specifically designed for safe solar observation, will cause immediate and permanent eye damage, including blindness. Always use a certified solar filter that covers the front 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\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eB270 Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\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;90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;99% (on light pollution lines)\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\u003eSurface Quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\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 Moon \u0026amp; Skyglow 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 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":52941911294237,"sku":"OPT-10501","price":45.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":52941911327005,"sku":"OPT-10502","price":67.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-Moon-Skyglow-Filter-1_176bee0d-3759-4793-929e-bc873bad8163.jpg?v=1789592332"},{"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\/visual-filters.oembed?page=2","provider":"David Astro","version":"1.0","type":"link"}