{"title":"Filtres bibandes Optolong","description":"\u003cp\u003eLes filtres bibandes Optolong isolent deux raies d'émission ou plus en même temps, ce qui permet aux caméras couleur de photographier les nébuleuses malgré une forte pollution lumineuse ou la Lune. La collection comprend les Ha\/OIII L-Para 10nm, L-Extreme 7nm et L-Ultimate 3nm, le L-Synergy 7nm SII\/OIII, et les multibandes L-Enhance et L-Quad Enhance.\u003c\/p\u003e\u003cp\u003eUne bande plus étroite donne plus de contraste en ville mais demande des poses plus longues. Les ensembles Dual-Combo couvrent Ha, OIII et SII.\u003c\/p\u003e","products":[{"product_id":"optolong-l-enhance-filter","title":"Filtre Optolong L-Enhance","description":"\u003c!-- more --\u003e \u003cp\u003e\u003cspan\u003eOptolong L-eNhance est un filtre passe-bande double qui a été conçu pour les appareils photo reflex numériques (SLR), CMOS couleur et CCD monochromes. La commodité et la rentabilité de ce filtre permettent aux amateurs d'imager une riche sélection d'images astronomiques, même dans des zones lumineuses et fortement polluées par la lumière. Il isole efficacement les raies d'émission des nébuleuses H-Alpha, H-Beta et Oxygen III et atteint une transmission maximale pouvant atteindre 90 %. Les performances de ce filtre offrent des images qui contrôlent superbement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e Introduction\u003c\/h3\u003e\n\u003cp\u003e \u003cspan\u003eLa propagation incessante de l'urbanisation et sa pollution lumineuse associée sont devenues un problème croissant pour tous les photographes astro amateurs. Les solutions actuelles au problème peuvent être coûteuses et peuvent inclure l'achat d'une caméra monochrome, plusieurs types de filtres à bande étroite et une roue à filtres.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eOptolong L-eNhance\u003c\/strong\u003e apporte une solution économique et pratique pour les amateurs. Il s'agit d'un filtre passe-bande double qui a été conçu pour les appareils photo reflex numériques (reflex numériques), CMOS couleur et CCD monochromes. La commodité et la rentabilité de ce filtre permettent aux amateurs d'imager une riche sélection d'images astronomiques, même dans des zones lumineuses et fortement polluées par la lumière. Optolong pense que la conception de notre filtre L-eNhance est une innovation technique parmi les filtres. Il isole efficacement les raies d'émission des nébuleuses H-Alpha, H-Beta et Oxygen III et atteint une transmission maximale pouvant atteindre 90 %. Les performances de ce filtre offrent des images qui contrôlent parfaitement l'impact d'un ciel pollué par la lumière.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003cspan\u003eL'hydrogène est l'élément le plus grand, le plus primitif, le plus simple et le plus ancien de l'univers. Les scientifiques considèrent que l'hydrogène représente plus de 90 % de la substance visible dans l'espace. Notre soleil a 5 milliards d'années, mais jusqu'à présent, l'hydrogène est toujours la matière clé de la fusion nucléaire. Bien que l'élément soufre n'ait pas beaucoup d'importance scientifique, garder H et O a donc un sens pour l'exploration de la vie.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003ePar conséquent, nous mettons en évidence Ha, Hb, O3 et O2, et réduisons le signal de soufre.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e données techniques\u003c\/h3\u003e\n\u003cp\u003e \u003cspan\u003eSbustrate: B270\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eÉpaisseur : 1,85 mm\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eTpeak : T\u0026gt;90 %\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003ePlage de blocage : 300-1000nm\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eProfondeur de blocage : blocage de la ligne de pollution lumineuse \u0026gt; 99 %\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eQualité de surface : 60\/40\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eFront d'onde transmis RMS : λ\/4\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eParallélisme : 30s\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\" Monté","offer_id":44967781531933,"sku":"OPT-13801","price":251.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44967781564701,"sku":"OPT-13802","price":321.0,"currency_code":"CAD","in_stock":true},{"title":"Clip pour Canon EOS APS-C","offer_id":44967781597469,"sku":"OPT-13804","price":363.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Optolong-L-Enhance-2inch__85261.1612894707.1280.1280.jpg?v=1684345842"},{"product_id":"optolong-l-extreme-filter","title":"Filtre Optolong L-Extrême","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003eL-eXtreme est un filtre passe-bande de deux 7 nm qui peut être utilisé avec des caméras couleur à un coup comme les reflex numériques (SLR) et les caméras CCD monochromes, il est également plus adapté aux systèmes rapides. La commodité et la rentabilité de ce filtre permettent aux amateurs d'imager des nébuleuses à émission riche, même dans un ciel lumineux et pollué par la lumière. Optolong pense que la conception du filtre L-eXtreme serait un meilleur choix pour les systèmes rapides à un prix compétitif. Il isole les raies d'émission des nébuleuses H-Alpha et Oxygène III afin que le contraste et le rapport signal sur bruit entre les nébuleuses soient maximisés. Pour les personnes qui vivent dans des zones très légèrement polluées, ou lorsque la lune est sortie, le L-eXtreme sera un bon filtre.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003cspan\u003eContrairement au filtre Optolong L-eNhance qui est un tri-bande (transmet Hb, Ha et OIII), le filtre L-eXtreme est à double bande qui laisse passer les lignes d'émission Ha et OIII. L'avantage du filtre L-eXtreme est qu'il n'y a pas de transmission entre les raies H-bêta et OIII, car il n'y a pas de raies d'émission de nébuleuse là-bas. Dans ce cas, il ne laisse pas passer la pollution lumineuse, ce qui maximise le signal des nébuleuses et rend le fond du ciel plus sombre lors de l'imagerie. Le filtre L-eXtreme devrait mieux isoler les raies d'émission uniquement et mieux protéger de la pollution lumineuse.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e \u003cspan\u003eL'hydrogène est l'élément le plus grand, le plus primitif, le plus simple et le plus ancien de l'univers. Les scientifiques considèrent que l'hydrogène représente plus de 90% de la substance visible dans l'espace. Notre soleil a 5 milliards d'années, mais jusqu'à présent, l'hydrogène est toujours la matière clé de la fusion nucléaire. Bien que l'élément soufre n'ait pas beaucoup d'importance scientifique, garder H et O a donc un sens pour l'exploration de la vie.\u003c\/span\u003e \u003cbr\u003ePar conséquent, nous mettons en évidence Ha, Hb, O3 et O2, et réduisons le signal de soufre.\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003e\u003cstrong\u003e2. Spectre et caractéristique\u003c\/strong\u003e\u003cbr\u003e Sbustrate: B270\u003cbr\u003e Épaisseur : 1,85 mm\u003cbr\u003e Tpeak : T\u0026gt;90 %\u003cbr\u003e Plage de blocage : 300-1000nm\u003cbr\u003e Profondeur de blocage : blocage de la ligne de pollution lumineuse \u0026gt; 99 %\u003cbr\u003e Qualité de surface : 60\/40\u003cbr\u003e Front d'onde transmis RMS : λ\/4\u003cbr\u003e Parallélisme : 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_af4878c1a6fc4e40d035e2ddf44218cf.png?v=1684346852\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e\u003cspan\u003eComment lire le tableau ?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e ▲ L'axe horizontal est la longueur d'onde en nanomètres (nm).\u003c\/p\u003e\n\u003cp\u003e ▲L'axe vertical est la transmission en %.\u003c\/p\u003e\n\u003cp\u003e ▲La ligne ROUGE montre la ligne de Halph. La ligne verte montre l'émission d'OIII. Les raies d'émission artificielles sont représentées en ORANGE. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/www.optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003e\u003cstrong\u003e3. Technologie de revêtement\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e ·Revêtement anti-reflet multicouches\u003c\/p\u003e\n\u003cp\u003e ·Revêtement de substrat optique non cimentant\u003c\/p\u003e\n\u003cp\u003e · Le filtre Optolong adopte un revêtement de précision basé sur la technologie de revêtement par dépôt assisté par ions pour la durabilité et la résistance aux rayures, ainsi que la stabilité sur CWL (longueur d'onde centrale) aucune déviation affectée par le changement de température.\u003c\/p\u003e \u003cp\u003e·Le système de rotation planétaire offre une précision et une homogénéité des revêtements assurant une valeur élevée sur la transmission de la bande passante et la densité optique de la bande passante.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\" Monté","offer_id":44967910277405,"sku":"OPT-13901","price":335.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44967910310173,"sku":"OPT-13902","price":432.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Nikon Z Full Frame","offer_id":52942348550429,"sku":"OPT-LEXTREME-NK-Z","price":363.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Optolong-L-Enhance__74495.1625788241.1280.1280.jpg?v=1684346873"},{"product_id":"optolong-l-ultimate-filter","title":"Optolong Filtre L-Ultimate Ha\/OIII 3nm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eRéduction extrême de la pollution lumineuse\u003c\/li\u003e\n\u003cli\u003eBandes passantes ultra étroites de 3 nm\u003c\/li\u003e\n\u003cli\u003eIsole les émissions clés H-alpha et OIII\u003c\/li\u003e\n\u003cli\u003eOffre un contraste supérieur et un fond de ciel plus sombre\u003c\/li\u003e\n\u003cli\u003eMinimise les halos d'étoiles sur les étoiles brillantes\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\u003eCaractéristiques\u003c\/li\u003e\n\u003cli\u003eDans la boîte\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\u003ePrésentation du filtre Optolong L-Ultimate\u003c\/h2\u003e\n\u003cp\u003eL'Optolong L-Ultimate est un filtre passe-bande double haute performance spécialement conçu pour les astrophotographes utilisant des appareils photo couleur (DSLR, CMOS ou CCD) pour capturer les nébuleuses en émission. Grâce à ses bandes passantes ultra-étroites de 3 nm centrées sur les raies d'émission clés des nébuleuses – O III à 500,7 nm et H-alpha à 656,3 nm –, le filtre ne laisse passer que la lumière nébulaire et bloque l'éclairage public et les émissions atmosphériques indésirables. Cela assombrit considérablement le fond du ciel et améliore considérablement le contraste de l'image et le rapport signal\/bruit. Le L-Ultimate est l'un des outils les plus efficaces pour éliminer la pollution lumineuse extrême et capturer des images époustouflantes de nébuleuses en émission.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eCapture double en une\u0026nbsp;exposition\u003c\/h3\u003e\n\u003cp\u003eContrairement aux configurations monochromes qui nécessitent plusieurs filtres et des expositions nocturnes longues, ce filtre capture les signaux H-alpha et OIII en une seule exposition lorsqu'il est associé à des caméras couleur. Cela vous fait gagner du temps et simplifie votre configuration, vous permettant d'obtenir des résultats comparables à ceux d'une caméra monochrome équipée de filtres à bande étroite séparés.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cimg alt=\"Exemple de L-Ultimate NGC6888 par Andrea Maggi\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L-Ultimate-NGC6888-Example.jpg?v=1756078322\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eÉtoiles plus nettes, effets de halo minimes\u003c\/h3\u003e\n\u003cp\u003eLe filtre L-Ultimate est conçu pour réduire considérablement les halos autour des étoiles brillantes, un problème fréquent avec les filtres à bande large, offrant des images d'étoiles plus nettes et plus nettes. En bloquant toute la lumière, à l'exception des raies d'émission critiques H-alpha et OIII, grâce à des bandes passantes ultra-étroites de 3 nm, le filtre maximise le signal des nébuleuses tout en minimisant le bruit du fond du ciel, ce qui produit une image finale plus nette nécessitant moins de post-traitement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cimg alt=\"Graphique de transmission Optolong L-Ultimate\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Optolong-L-Ultimate-2-inch-Transmission-Graph__82916.1665168471.1280.1280.jpg?v=1684348283\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eL-Ultimate contre L-eNhance et L-eXtreme\u003c\/h3\u003e\n\u003cp\u003eLe \u003cstrong\u003eL-Ultimate\u003c\/strong\u003e est un filtre à bande ultra-étroite double de 3 nm qui transmet uniquement les lignes d'émission H-alpha (656,3 nm) et O III (500,7 nm). Comparé au \u003cstrong\u003eL-eXtreme\u003c\/strong\u003e (double 7 nm) et \u003cstrong\u003eau L-eNhance\u003c\/strong\u003e (H-alpha 10 nm + O III\/H-beta 24 nm), le L-Ultimate offre plusieurs avantages :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFond de ciel plus sombre\u003c\/strong\u003e – sa bande passante plus étroite de 3 nm bloque presque toute la pollution lumineuse et les longueurs d’onde indésirables.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eContraste plus élevé et détails plus fins\u003c\/strong\u003e : les structures nébuleuses faibles ressortent plus clairement.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eContrôle supérieur des étoiles\u003c\/strong\u003e – réduit considérablement les halos et le gonflement des étoiles par rapport au L-eXtreme et surtout au L-eNhance.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePréservation optimisée des couleurs\u003c\/strong\u003e – maintient l’équilibre naturel des rouges H-alpha et des bleus\/verts O III.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEn bref:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eL-eNhance\u003c\/strong\u003e – filtre anti-pollution lumineuse d'entrée de gamme, bandes passantes plus larges, capture plus de lumière à large bande mais avec plus de lueur du ciel.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eL-eXtreme\u003c\/strong\u003e – contrôle plus strict (7 nm), réduction de la pollution lumineuse plus forte, mais permet toujours plus de lumière de fond que le L-Ultimate.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eL-Ultimate\u003c\/strong\u003e – l'option la plus avancée, avec la bande passante la plus étroite pour un contraste maximal, les étoiles les plus propres et les meilleures performances en cas de forte pollution lumineuse ou sous un clair de lune intense.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eBlocage UV et IR\u003c\/h3\u003e\n\u003cp\u003eLa conception du filtre L-Ultimate supprime intrinsèquement les longueurs d'onde ultraviolettes (UV) et infrarouges (IR). Cette fonctionnalité simplifie le processus d'imagerie en éliminant le besoin d'un filtre anti-IR distinct. Cette capacité de blocage complète garantit que la lumière parasite provenant des deux extrémités du spectre visible n'interfère pas avec l'image finale.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\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\u003e\n\u003cp\u003eMatériel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eVerre optique Schott B270\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eÉpaisseur\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1,85 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eHauteur de la cellule filtrante\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e4,8 mm sans filetage mâle, 6,8 mm avec filetage\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eH-alpha 3 nm, OIII 3 nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eQualité de surface\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e60\/40 (se référer à MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePolissage optique\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ePoli optiquement pour garantir un front d'onde précis de 1\/4 et un parallélisme \u0026lt; 30 secondes\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmission élevée à H-alpha (656,3 nm) et OIII (500,7 nm)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocage\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOD4 (300-1000 nm), bloquant toutes les principales lignes de pollution lumineuse artificielle\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003cimg class=\"DAV-img-box\" alt=\"Filtre L-Ultimate\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L-Ultimate-2-inch-2__17268.1665168471.1280.1280_69b8bbf8-9db7-408c-84d8-4b9bc30fb052.jpg?v=1698452806\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFiltre L-Ultimate\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\u003cimg class=\"DAV-img-box\" alt=\"Boîtier de filtre en plastique\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-Filter-Case.png?v=1756067596\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBoîtier 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\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\" Monté","offer_id":50286466203933,"sku":"OPT-11601","price":404.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Monté","offer_id":44968046559517,"sku":"OPT-11602","price":545.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Optolong-L-Ultimate-2-inch-2__17268.1665168471.1280.1280.jpg?v=1684348283"},{"product_id":"optolong-l-para-ha-oiii-10nm-filter-2","title":"Optolong L-Para HA\/OIII 10nm Filter - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDual Narrowband H-Alpha \u0026amp; OIII Filter\u003c\/li\u003e\n\u003cli\u003eSuppresses Mercury, Sodium \u0026amp; LED Light Pollution\u003c\/li\u003e\n\u003cli\u003eOptimized for Fast-Ratio Systems (RASA, HyperStar)\u003c\/li\u003e\n\u003cli\u003eAdvanced Anti-Halo Optical Design\u003c\/li\u003e\n\u003cli\u003eDurable Ion-Assisted Deposition 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\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 L-Para HA\/OIII 10nm Filter - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Optolong L-Para HA\/OIII filter is a dual narrowband filter designed to isolate critical nebula emission lines from hydrogen-alpha and oxygen-III. It aggressively suppresses common sources of urban light pollution, including mercury-vapor, sodium, and LED streetlights. This targeted filtration darkens the sky background, significantly increasing the contrast of emission nebulae for more detailed and vibrant 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\u003eDual-Bandpass Design for High-Contrast Nebula Imaging\u003c\/h3\u003e\n\u003cp\u003eThe L-Para filter targets the two most prominent emission lines in most nebulae—Hydrogen-alpha and Oxygen-III. By selectively passing light from these wavelengths while rejecting the rest of the spectrum, it renders the sky background exceptionally dark. This approach dramatically enhances the contrast between your deep-sky target and the surrounding sky, revealing faint structures that would otherwise be lost to light pollution.\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 Compatibility: Engineered for Fast and Standard Telescopes\u003c\/h3\u003e\n\u003cp\u003eA key design goal for the L-Para was compatibility across a wide range of instruments. It is engineered to maintain high transmission rates and color fidelity not only in standard focal ratio telescopes but also in very fast optical systems like RASA or HyperStar setups. The filter's performance holds up even when receiving steep, oblique light rays, ensuring one filter can serve your entire collection of telescopes without compromise.\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\u003eAdvanced Halo Suppression for Cleaner Stars\u003c\/h3\u003e\n\u003cp\u003eHalos around bright stars can obscure faint, nearby nebulosity and detract from the final image. The Optolong L-Para features an optimized coating stack specifically designed to minimize these artifacts. This meticulous anti-halo engineering results in cleaner, more precise star images and ensures that the delicate details of your target nebula remain the central focus.\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\u003eDurable Ion-Assisted Coatings for Lasting Reliability\u003c\/h3\u003e\n\u003cp\u003eOptolong utilizes an ion-assisted deposition coating process to produce the L-Para filter. This advanced technique creates a hard, dense coating that is highly resistant to scratching and environmental degradation. The result is a filter with stable, consistent wavelength transmission that will not deviate with temperature changes, providing reliable imaging results for years to come.\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 kind of objects is the Optolong L-Para filter best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Optolong L-Para is specifically designed for imaging \u003cstrong\u003eemission nebulae\u003c\/strong\u003e, which are rich in Hydrogen-alpha and Oxygen-III light. It excels on targets like the Orion Nebula (M42), the Lagoon Nebula (M8), and the North American Nebula (NGC 7000).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Optolong L-Para improve images from light-polluted skies?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt uses a dual narrowband design that selectively passes light from \u003cstrong\u003eHa and OIII\u003c\/strong\u003e while blocking broad-spectrum light from artificial sources like mercury, sodium, and LED streetlights. This darkens the sky background and dramatically boosts the contrast of your target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Optolong L-Para work with my fast f\/2 RASA telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the L-Para is engineered for compatibility with a wide range of optical systems, including very fast focal ratios like those found on \u003cstrong\u003eRASA and HyperStar systems\u003c\/strong\u003e. It's designed to maintain high transmission and avoid band-shifting even with the steep light cones from these instruments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Optolong L-Para for imaging galaxies like Andromeda (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile you can, it's not ideal. The L-Para is a narrowband filter that blocks most of the light from \u003cstrong\u003ebroadband targets like galaxies\u003c\/strong\u003e, which emit light across the entire visible spectrum. For galaxies, a broadband light pollution filter or unfiltered imaging from a dark site is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Optolong L-Para's halo control notable?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOptolong has specifically optimized the L-Para's coating design to \u003cstrong\u003esuppress halos\u003c\/strong\u003e, which are the rings of light that can appear around very bright stars. This results in cleaner star fields and prevents nebulosity near bright stars from being obscured.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Optolong L-Para a good choice for a one-shot-color camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. Dual narrowband filters like the L-Para are an excellent match for \u003cstrong\u003eone-shot-color (OSC) cameras\u003c\/strong\u003e. They allow you to capture both Ha and OIII data simultaneously, simplifying your workflow and producing dramatic, high-contrast nebula images even from urban locations.\u003c\/p\u003e\n\u003c\/div\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":"Default Title","offer_id":50077460758813,"sku":"OPT-AS100221","price":362.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L-Para-Filter.png?v=1750275530"},{"product_id":"optolong-l-quad-enhance-filter","title":"Optolong L-Quad Enhance Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eQuad-bandpass design for color cameras\u003c\/li\u003e\n\u003cli\u003eSuppresses light pollution with OD2-OD4 blocking depth\u003c\/li\u003e\n\u003cli\u003eMaintains sharpness with a λ\/4 transmitted wavefront\u003c\/li\u003e\n\u003cli\u003eConstructed from 1.85mm thick optical glass\u003c\/li\u003e\n\u003cli\u003eEnsures no double images with 30s parallelism\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 L-Quad Enhance Filter\u003c\/h2\u003e\n\u003cp\u003eThe Optolong L-Quad Enhance Filter is a specialized quad-bandpass light pollution filter for one-shot-color cameras, built on a 1.85mm optical glass substrate. It delivers deep suppression of artificial and natural skyglow with an optical density of OD2-OD4 across a broad 300-1000nm blocking range, isolating key celestial emission lines while preserving broadband color. With a transmitted wavefront held to λ\/4 and parallelism of 30 arcseconds, the L-QEF maintains sharp, detailed star images across the entire field.\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\u003eQuad-Bandpass Light Pollution Suppression at OD2-OD4\u003c\/h3\u003e\n\u003cp\u003eDesigned specifically for color cameras, the L-Quad Enhance Filter utilizes four precisely defined bandpasses to combat light pollution. With a blocking depth of OD2 to OD4, it eliminates between 99% and 99.99% of unwanted wavelengths from sources like mercury and sodium streetlights, dramatically increasing the contrast between your target and the sky background. This aggressive suppression allows you to capture clean data even from suburban locations or under moonlight.\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 for Broadband Targets like Galaxies \u0026amp; Clusters\u003c\/h3\u003e\n\u003cp\u003eUnlike narrowband filters that isolate only emission lines, the L-QEF is engineered to capture both nebulae and broadband targets. Its passbands are chosen to preserve the continuous spectrum of galaxies and the subtle star colors in clusters, providing a more natural color balance directly out of the camera. The guaranteed λ\/4 transmitted wavefront ensures that the filter does not introduce optical errors, preserving the sharpness required to resolve fine details in targets like the Sculptor Galaxy (NGC 253) or the stars of the Double Cluster (NGC 869\/884).\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\u003e30s Parallelism for Pinpoint Stars Across the Field\u003c\/h3\u003e\n\u003cp\u003eOptical precision is critical in any filter, and the L-QEF is held to strict mechanical tolerances. A parallelism of 30 arcseconds guarantees that the two faces of the filter are almost perfectly parallel. This prevents the introduction of image shift or distorted stars, ensuring that pinpoint stellar images from your telescope's optics remain perfectly round and sharp from edge to edge.\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\u003eDurable Ion-Assisted Coatings on 1.85mm Substrate\u003c\/h3\u003e\n\u003cp\u003eThe L-Quad Enhance Filter's multi-layer coatings are applied using an advanced ion-assisted deposition process. This technology creates a dense, durable, and scratch-resistant surface that is easy to clean and maintains its spectral performance over time. Built on a 1.85mm thick optical glass substrate with a 60\/40 surface quality, the filter is parfocal with other standard astronomy filters, minimizing the need to refocus when using a filter wheel.\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 Optolong L-Quad Enhance Filter differ from a dual-band nebula filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA dual-band filter typically isolates only the H-alpha and OIII emission lines, which is ideal for emission nebulae but can result in unnatural colors for broadband targets like galaxies and star clusters. The \u003cstrong\u003eOptolong L-Quad Enhance Filter\u003c\/strong\u003e uses four passbands, which allows it to capture a more complete spectrum, resulting in better color balance for all types of deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Optolong L-Quad Enhance Filter to image the Sculptor Galaxy (NGC 253) from a suburban backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent use case for the \u003cstrong\u003eL-QEF\u003c\/strong\u003e. The filter is specifically designed to suppress common forms of light pollution while preserving the continuous spectrum of galaxies. It will help darken the sky background and increase the contrast of NGC 253's dust lanes and star-forming regions, making it possible to capture a high-quality image from light-polluted areas.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Optolong L-QEF perform on the North American Nebula (NGC 7000) with a one-shot-color camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eL-QEF\u003c\/strong\u003e will perform very well. For large emission nebulae like the North American Nebula, the filter will isolate the critical red (H-alpha) and blue-green (H-beta\/OIII) wavelengths while blocking skyglow. This dramatically boosts the nebula's contrast against the background, revealing faint structures and details that would otherwise be lost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the L-Quad Enhance Filter produce halos around bright stars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eOptolong L-Quad Enhance Filter\u003c\/strong\u003e is designed with advanced anti-reflection coatings to minimize halos and other internal reflections around bright stars. User tests confirm that it controls halos effectively, producing clean stellar profiles even on challenging targets.\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 my images with the L-QEF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003eλ\/4 (1\/4 wave) transmitted wavefront\u003c\/strong\u003e is a measure of optical flatness and precision. It guarantees that the filter will not degrade the quality of the light passing through it, preserving the sharpness and resolution delivered by your telescope. This is crucial for capturing fine details and maintaining tight, point-like stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Optolong L-Quad Enhance Filter suitable for imaging under a full moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, while no filter can eliminate all moonlight, the \u003cstrong\u003eL-Quad Enhance Filter's\u003c\/strong\u003e strong suppression of background skyglow makes it highly effective at mitigating the impact of the Moon. It allows you to continue imaging on nights that would otherwise be unusable, significantly increasing your opportunities to capture data.\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\u003eOptical 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\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eOD2-OD4\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\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":"2\" Mounted","offer_id":50289892688157,"sku":"OPT-14702","price":278.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L-Quad-Enhance-Filter.jpg?v=1756170392"},{"product_id":"optolong-l1-dual-combo-set","title":"Optolong L-Quad Enhance + L-Para L1 Dual-Combo Filter Set - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eL-Quad Enhance Filter:\u003c\/strong\u003e A quad-bandpass filter designed for balanced RGB color from broadband targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL-Para L1 Filter:\u003c\/strong\u003e A dual-narrowband filter that isolates H-alpha and OIII emission lines for high-contrast detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroadband-Narrowband Synergy:\u003c\/strong\u003e A two-filter system designed for capturing separate color and detail data to be combined in post-processing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for Fast Optics:\u003c\/strong\u003e The L-Para filter maintains excellent contrast and anti-halo characteristics even in fast optical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIon-Assisted Coatings:\u003c\/strong\u003e Precision coatings ensure durability, scratch resistance, and stable central wavelength performance regardless of temperature changes.\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\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 L-Quad Enhance + L-Para L1 Dual-Combo Filter Set - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe Optolong L-Quad Enhance and L-Para L1 Dual-Combo Filter Set redefines color astrophotography by separating the capture of broadband color and narrowband detail into two specialized steps. This \"Broadband-Narrowband Synergy\" approach uses the L-Quad Enhance filter to acquire rich, natural RGB data from stars and galaxies, while the L-Para L1 dual-narrowband filter isolates the critical H-alpha and OIII emission lines that reveal the intricate structures within nebulae. By combining the data from both, you can produce images with vibrant, accurate color and deep, high-contrast details that are difficult to achieve with a single filter.\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\u003eL-Quad Enhance: A Broadband Filter for True-Color Imaging\u003c\/h3\u003e\n\u003cp\u003eThe L-Quad Enhance is a quad-bandpass filter engineered to capture continuous-spectrum objects with superior color fidelity, even from light-polluted skies. It preserves the natural RGB color balance of targets like the Andromeda Galaxy (M31) or star clusters, improving overall contrast and making your subjects appear more vivid. This filter acts as the color foundation of your image, ensuring stars and galactic structures retain their true appearance.\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\u003eL-Para: Isolating Hα \u0026amp; OIII for Maximum Nebula Detail\u003c\/h3\u003e\n\u003cp\u003eThe L-Para is a dual-narrowband filter that selectively passes H-alpha and Oxygen-III emission lines, the two most important wavelengths for revealing the structure of emission nebulae. It is designed to deliver excellent contrast and anti-halo performance, making it highly effective even with very fast optical systems. By isolating these specific signals, the L-Para captures the fine, filamentary details and ionized gas morphology in targets like the Lagoon Nebula (M8) or Horsehead Nebula (B33).\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\u003eThe Synergy Workflow: Fusing Broadband Color with Narrowband Data\u003c\/h3\u003e\n\u003cp\u003eThis two-filter set enables a powerful imaging workflow. You use the L-Quad Enhance to shoot your primary RGB frames, capturing the broadband color data. You then switch to the L-Para to gather dedicated H-alpha and OIII data. In post-processing software like PixInsight or Photoshop, these separate data sets are combined, allowing the rich color from the L-Quad to be layered with the sharp, high-contrast details from the L-Para, creating a final image with exceptional depth and clarity.\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\u003eDual-Filter Strategy vs. a Single Multi-Bandpass Filter\u003c\/h3\u003e\n\u003cp\u003eWhile a single tri- or quad-band filter captures all wavelengths simultaneously, this dual-filter strategy offers greater control and optimization. You can dedicate more imaging time to capturing the faint Hα and OIII signals with the L-Para, without overexposing the broadband data. This separation allows you to independently control the signal-to-noise ratio of your color and detail layers, giving you more flexibility in processing to achieve a customized final result.\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\u003eIon-Assisted Coatings for Wavelength Stability and Durability\u003c\/h3\u003e\n\u003cp\u003eBoth Optolong filters are manufactured using an ion-assisted deposition coating process. This advanced technique creates a dense, durable, and scratch-resistant surface. Critically, it ensures the central wavelength (CWL) of the filter passbands does not shift with temperature changes during an imaging session, providing consistent, reliable data from dusk till dawn.\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 advantage of the Optolong L-Quad + L-Para set over a single filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis set offers superior \u003cstrong\u003eprocessing flexibility\u003c\/strong\u003e. By capturing broadband color (with the L-Quad) and narrowband detail (with the L-Para) separately, you have independent control over each data stream. This allows you to optimize exposure times for faint nebula structures without compromising natural star color, leading to a more dynamic and detailed final image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Optolong dual-filter set on the Trifid Nebula (M20)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Trifid Nebula is a perfect target for this set. You would use the \u003cstrong\u003eL-Quad Enhance\u003c\/strong\u003e filter to capture the blue reflection nebula and the surrounding starfield in true color. Then, you would switch to the \u003cstrong\u003eL-Para filter\u003c\/strong\u003e to gather deep exposures of the red H-alpha emission regions. Combining these in post-processing will showcase both the vibrant reflection and emission components with maximum detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the L-Para filter in this Optolong set suitable for my fast f\/2 RASA or Hyperstar system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The L-Para filter is specifically designed to perform exceptionally well with fast optical systems. It maintains high transmission for the H-alpha and OIII lines while controlling halos, ensuring you can capture high-contrast, detailed images of nebulae even with very short focal ratios.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Optolong L-Quad Enhance filter by itself for galaxies?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The L-Quad Enhance filter is an excellent standalone filter for broadband targets like galaxies and star clusters. It works as a light pollution filter that provides a much more natural color balance than typical multi-bandpass nebula filters, making it ideal for capturing continuous-spectrum objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects benefit most from the Optolong L-Para filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe L-Para filter excels on \u003cstrong\u003eemission nebulae\u003c\/strong\u003e. These are objects rich in ionized hydrogen (H-alpha) and oxygen (OIII). Prime targets include the Rosetta Nebula (NGC 2237), the Veil Nebula complex, and the North America Nebula (NGC 7000), where the filter will dramatically increase contrast and reveal faint structures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"CWL stability\" mean for these Optolong filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCWL stands for Central Wavelength. \"CWL stability\" means the filter's passbands will not drift or change even as the ambient temperature fluctuates throughout the night. This is ensured by Optolong's advanced coating technology and results in more consistent and reliable data collection during long imaging sessions.\u003c\/p\u003e\n\u003c\/div\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":"Default Title","offer_id":50341802574109,"sku":"OPT-L1-SET","price":558.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L1-Dual-Combo-Set.jpg?v=1757558556"},{"product_id":"optolong-l-synergy-7nm-sii-oiii-dual-narrowband-filter","title":"Optolong L-Synergy 7nm SII\/OIII Dual Narrowband Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCaptures Sulfur-II and Oxygen-III Emission Lines Simultaneously\u003c\/li\u003e\n\u003cli\u003eEngineered for Hubble Palette (SHO) Imaging with Color Cameras\u003c\/li\u003e\n\u003cli\u003eStrict 7nm Bandpass for High-Contrast Views in Light Pollution\u003c\/li\u003e\n\u003cli\u003eDesigned to Complement Standard Ha\/OIII Dual-Band Filters\u003c\/li\u003e\n\u003cli\u003eIon-Assisted Coatings for Durability and Wavelength Stability\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\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 L-Synergy 7nm SII\/OIII Dual Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eThe Optolong L-Synergy 7nm SII\/OIII Dual Narrowband Filter is a specialized tool designed to unlock Hubble Palette (SHO) astrophotography for color camera users. By isolating the Sulfur-II and Oxygen-III emission lines within a tight 7nm bandpass, this filter captures the two signals that standard dual-band filters miss. When combined with data from a traditional Ha\/OIII filter, the L-Synergy enables you to produce full three-channel narrowband images without investing in a monochrome camera and filter wheel.\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\u003eThe L-Synergy Concept: SHO Imaging with a 7nm Color Camera Filter\u003c\/h3\u003e\n\u003cp\u003eTraditional SHO imaging requires a monochrome camera and three separate filters for Hydrogen-alpha, Sulfur-II, and Oxygen-III. The L-Synergy filter provides a more accessible path by targeting the missing data for a one-shot-color sensor. Paired with an existing Ha\/OIII filter, this 7nm SII\/OIII filter completes the dataset, allowing you to separate and process all three signals to create vibrant Hubble Palette composites.\u003c\/p\u003e\n\u003cp\u003eThis dual-filter strategy dramatically simplifies both the hardware required and the post-processing workflow. By capturing strong, distinct signal for both SII and OIII, the raw data is cleaner and requires less aggressive stretching or gradient removal, leading to a more natural final image with minimal effort.\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 Sulfur and Oxygen: A 7nm Bandpass for Maximum Contrast\u003c\/h3\u003e\n\u003cp\u003eThe filter's strict 7nm bandpass is the key to its high-contrast imaging. This narrow window transmits nearly all light from the targeted SII and OIII emission lines while aggressively blocking out light pollution, moonlight, and airglow. This selective transmission results in a significantly darker sky background, making faint nebular structures stand out with enhanced detail and signal-to-noise ratio, even from urban or suburban 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\u003eIon-Assisted Deposition Coatings for Wavelength Stability\u003c\/h3\u003e\n\u003cp\u003eOptolong utilizes an advanced ion-assisted deposition coating process to manufacture the L-Synergy filter. This technique produces a hard, scratch-resistant surface and ensures the central wavelength of the filter does not shift due to temperature changes during an imaging session. This stability guarantees that your filter consistently captures the intended emission lines, preventing signal loss and maintaining color fidelity throughout the night.\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\u003eL-Synergy Method vs. Traditional Monochrome SHO Imaging\u003c\/h3\u003e\n\u003cp\u003eChoosing an imaging strategy involves trade-offs between cost, complexity, and ultimate signal purity. The L-Synergy method offers a compelling alternative to a full monochrome setup.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonochrome SHO Advantage:\u003c\/strong\u003e A monochrome camera with dedicated filters offers the highest possible resolution and signal sensitivity, as it avoids the light loss inherent in a color camera's Bayer matrix. It remains the gold standard for scientific-grade data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL-Synergy Advantage:\u003c\/strong\u003e This method delivers results that are comparable to monochrome for a fraction of the cost and complexity. It allows you to use your existing DSLR or color CMOS camera, avoiding the need for a new camera, electronic filter wheel, and a full set of narrowband filters.\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 does the Optolong L-Synergy filter create Hubble Palette images with a color camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe L-Synergy filter captures the \u003cstrong\u003eSulfur-II (SII) and Oxygen-III (OIII)\u003c\/strong\u003e signals. You use it in conjunction with a separate Ha\/OIII filter. By combining the data from both filters, you can isolate the Ha, SII, and OIII channels in post-processing and assign them to the Red, Green, and Blue channels of a final image to create the classic SHO Hubble Palette.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat other filter do I need to use with the Optolong L-Synergy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo capture a complete SHO dataset, you need to pair the L-Synergy (SII\/OIII) filter with a standard dual-band filter that captures \u003cstrong\u003eHydrogen-alpha (Ha) and Oxygen-III (OIII)\u003c\/strong\u003e, such as the Optolong L-eNhance or L-eXtreme.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Optolong L-Synergy 7nm filter work well with my fast telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis filter is optimized for telescope systems with focal ratios of \u003cstrong\u003ef\/3.3 and slower\u003c\/strong\u003e. Using it with faster optical systems (e.g., f\/2) may cause a shift in the filter's bandpass, leading to reduced signal transmission and a potential loss of performance. For the best results, it should be used within its recommended focal ratio range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Optolong L-Synergy filter improve imaging from a light-polluted city?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe filter's tight \u003cstrong\u003e7nm bandpass\u003c\/strong\u003e blocks out the broad-spectrum light common to urban light pollution (like sodium and mercury vapor lamps) and natural skyglow. It only allows the specific light from emission nebulae to pass through, dramatically increasing contrast and revealing faint details that would otherwise be washed out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Optolong L-Synergy to image the Wolf-Rayet nebula WR134?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. WR134 in Cygnus is an excellent target for the L-Synergy filter because its expanding shell is extremely rich in Oxygen-III, with some Sulfur-II signal as well. This filter is ideal for capturing the intricate blue-green arc of OIII that defines this object, which is often faint with other filter types.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Optolong L-Synergy perform on the Heart Nebula (IC 1805)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Heart Nebula is another prime target. While known for its strong Hydrogen-alpha signal (which you'd capture with an Ha\/OIII filter), it also contains significant regions of Sulfur-II and Oxygen-III. The L-Synergy filter will capture the data needed to add the golden hues of SII and the teal tones of OIII, transforming the typically red nebula into a full, multi-colored Hubble Palette image.\u003c\/p\u003e\n\u003c\/div\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":"Default Title","offer_id":50399317033245,"sku":"OPT-LSYNERGY","price":432.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L-Synergy-Filter-1.jpg?v=1758936099"},{"product_id":"optolong-l-extreme-l-synergy-l2-dual-combo-filter-set-2","title":"Optolong L-Extreme + L-Synergy L2 Dual-Combo Filter Set - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIncludes L-eXtreme (H-alpha + OIII) and L-Synergy (SII + OIII) filters\u003c\/li\u003e\n\u003cli\u003eEnables Hubble Palette (SHO) imaging with one-shot color cameras\u003c\/li\u003e\n\u003cli\u003eCaptures three key nebula emission bands across two filters\u003c\/li\u003e\n\u003cli\u003eDesigned for modern, fast focal ratio telescope systems\u003c\/li\u003e\n\u003cli\u003eAdvanced ion-assisted coatings suppress halos and light pollution\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\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 L-Extreme + L-Synergy L2 Dual-Combo Filter Set - 2\"\u003c\/h2\u003e\n      \u003cp\u003eThe Optolong L-Extreme + L-Synergy L2 Dual-Combo Filter Set is engineered to bring Hubble Palette imaging to one-shot color cameras, eliminating the need for a monochrome setup. This set combines the L-eXtreme (H-alpha and OIII) and L-Synergy (SII and OIII) dual-narrowband filters to isolate the three most important emission lines in deep-sky astrophotography. By capturing this data over two imaging sessions instead of one, you can create full SHO composite images with the operational simplicity of your existing color camera.\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\u003eUnlocking the Hubble Palette for Color Cameras with the Optolong L2 Set\u003c\/h3\u003e\n      \u003cp\u003eHistorically, creating SHO \"Hubble Palette\" images required a monochrome camera, a filter wheel, and three separate narrowband filters—a costly and complex setup. The Optolong L2 Dual-Combo set breaks this barrier by intelligently pairing two dual-bandpass filters, allowing your color camera to collect all the necessary data to assemble a full SHO image, from the hydrogen greens of the North American Nebula (NGC 7000) to the sulfur reds of the Pelican Nebula (IC 5070).\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\u003eThe L-eXtreme Filter: Capturing Ha and OIII in a Single Frame\u003c\/h3\u003e\n      \u003cp\u003eThe first filter in the set is the renowned L-eXtreme, which isolates the Hydrogen-alpha and Oxygen-III emission lines. These two signals represent the most dominant wavelengths in most emission nebulae. The filter transmits these specific bands while aggressively blocking light pollution and other unwanted signals, ensuring maximum contrast and signal-to-noise ratio for the H-alpha and OIII data channels in your final image.\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\u003eThe L-Synergy Filter: Adding the Critical SII Signal for SHO\u003c\/h3\u003e\n      \u003cp\u003eThe L-Synergy filter completes the trio by isolating the Sulfur-II and Oxygen-III emission lines. While you capture OIII data with both filters, the L-Synergy's primary role is to gather the crucial SII signal, which forms the red channel in a traditional Hubble Palette. This filter provides the final piece of the puzzle, enabling a three-channel color mapping (SII=Red, Ha=Green, OIII=Blue) from data captured with just two filters.\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\u003eOptolong L2 Dual-Combo vs. Monochrome SHO: A Simpler Workflow\u003c\/h3\u003e\n      \u003cp\u003eFor imagers who want SHO results without the expense and learning curve of a monochrome system, the L2 Dual-Combo set is the direct solution. A monochrome setup's advantage is its ultimate control over data, but it requires more accessories, longer total integration times, and complex processing. The L2 set preserves the simplicity of color imaging—fewer cables, no filter wheel, and a more streamlined workflow—while delivering access to the same creative color palette previously reserved for mono users.\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\u003eAdvanced Coatings for High-Contrast, Halo-Free Results\u003c\/h3\u003e\n      \u003cp\u003eBoth filters in the L2 set are manufactured using an ion-assisted deposition coating process. This technology ensures the filter coatings are physically durable, resistant to scratching, and stable against temperature shifts that can cause other filters to drift off-wavelength. The result is precise, consistent bandpass performance and excellent suppression of halos around bright stars, yielding clean, high-contrast data ready for processing.\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\"\u003eHow does the Optolong L2 Dual-Combo Set create a Hubble Palette image with a color camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe set allows you to capture all three essential narrowband channels (H-alpha, OIII, and SII) using a one-shot color camera. You use the \u003cstrong\u003eL-eXtreme filter\u003c\/strong\u003e to capture Ha and OIII data, then the \u003cstrong\u003eL-Synergy filter\u003c\/strong\u003e to capture SII and OIII data. In processing, you separate the color channels from both data sets to isolate the individual signals and then combine them into an SHO (SII=Red, Ha=Green, OIII=Blue) image.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the imaging process for the L2 Dual-Combo filters with my 8\" f\/4 Newtonian?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe process involves two separate imaging sessions on the same target. First, install the L-eXtreme filter and capture a series of sub-exposures. On a subsequent night (or after the first session), swap to the L-Synergy filter and capture another series of subs with similar total integration time. Because the set is designed for fast optical systems like your f\/4 Newtonian, you can gather significant signal efficiently.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Optolong L2 filters work well with my fast refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this filter set is specifically designed to perform well with fast telescope systems. The coatings and bandpass characteristics are engineered to maintain signal integrity and minimize artifacts even at steep light cones, making them an excellent match for modern fast refractors and astrographs.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the Optolong L2 set over using a monochrome camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary advantage is \u003cstrong\u003ecost and simplicity\u003c\/strong\u003e. The L2 Dual-Combo set allows you to achieve SHO imaging without purchasing a separate monochrome camera, an electronic filter wheel, and a full set of LRGB and SHO filters. It leverages the color camera you already own, resulting in a much lower barrier to entry for creating Hubble Palette images.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I combine the data from the L-eXtreme and L-Synergy filters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAfter calibrating and stacking your images from each filter separately, you will have two master files. Using software like PixInsight or Siril, you can split the RGB channels of each master. The red channel from the L-eXtreme data becomes your H-alpha. The red channel from the L-Synergy data becomes your SII. The blue\/green channels from either can be used for your OIII, often by combining them for better signal. You then assign these three extracted grayscale images to the R, G, and B channels of a new color image.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDo these Optolong filters help reduce halos around bright stars?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Both the L-eXtreme and L-Synergy filters are manufactured with advanced coating techniques that significantly suppress internal reflections. This technology is optimized to minimize the bright, distracting halos that can appear around high-magnitude stars in long narrowband exposures.\u003c\/p\u003e\n  \u003c\/div\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":"Default Title","offer_id":50923140808989,"sku":"OPT-L2-COMBO","price":796.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Optolong-L2Dual-Combo-Filter-Set.jpg?v=1770476463"}],"url":"https:\/\/davidastro.com\/fr\/collections\/optolong-dual-band-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}