{"title":"Lunettes Askar","description":"\u003cp\u003eLes lunettes Askar sont des lunettes apochromatiques et des astrographes conçus surtout pour l'astrophotographie, avec plusieurs formules optiques. Les quintuplets Petzval SQA, comme les SQA85 et SQA130, et les quintuplets FRA sont rapides et grand champ, les quadruplets PHQ et les modèles F à champ plat offrent des focales plus longues, et les triplets APO de la 120APO à la 185APO conviennent au travail à haute résolution.\u003c\/p\u003e\u003cp\u003eLa 50P, un quadruplet à f\/3.8, est une option très compacte pour le grand champ.\u003c\/p\u003e","products":[{"product_id":"askar-fra400-72mm-f-5-6-quintuplet-apo","title":"Askar FRA400 72mm f\/5.6 Quintuplet APO","description":"\u003cul\u003e\n\n\u003cli\u003e72 mm f\/5,6 Quintuplet APO\u003c\/li\u003e\n\n\u003cli\u003e Cercle d'image à champ plat de 44 mm\u003c\/li\u003e\n\n\u003cli\u003e Distance focale de 400 mm\u003c\/li\u003e\n\n\u003cli\u003e Porte-oculaire à crémaillère et pignon 3\" avec rotateur\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description\u003c\/li\u003e\n\n\u003cli\u003e Caractéristiques\u003c\/li\u003e\n\n\u003cli\u003e Dans la boite\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\"\u003e\n\n\u003ch3\u003e Askar FRA400 Pro 72 mm f\/5,6 Quintuplet APO\u003c\/h3\u003e\n\n\u003cdiv style=\"text-align: justify;\"\u003e\n\n\u003cp\u003e Bienvenue dans la toute nouvelle série ASKAR FRA ! Le FRA, qui signifie « FLATFIELD REFRACTIVE ASTRAGRAPH », est un astrographe réfractif conçu pour la correction intégrée du champ plat. FRA également utilisé dans l'observation visuelle, cette série crée des images à cadre plat polyvalentes de haute qualité pour l'astrophotographie, est le peu de grands télescopes à tube optique polyvalent.\u003cbr\u003e Conformément à la conversion facile des paramètres de l'objectif, notre premier produit de la série FRA est l'astrographe quintuplet f\/5,6 avec une distance focale de 400 mm et une ouverture de 72 mm. Deux éléments en verre ED (Extra-low Dispersion) sont également inclus pour supprimer efficacement l'aberration chromatique. Le FRA400 dispose d'un cercle d'image plein format de 44 mm.\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Qualité d'image exceptionnelle \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n \u003cp\u003ePour faciliter la conversion des paramètres entre différents objectifs, le premier venu de la famille FRA présente une conception quintuplée de type Petzval (dont deux pièces sont en verre ED spécial) avec une ouverture de 72 mm, une distance focale de 400 mm et un rapport focal de f \/5.6, fournissant un cercle d'image de 44 mm. \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"image-side-2\" style=\"text-align: start;\" data-mce-style=\"text-align: start;\"\u003e\u003cimg alt=\"Askar FRA400 72 mm f\/5,6 Quintuplet APO\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-FRA400-1__17210.1610295680.1280.1280_832x832.jpg?v=1684345825%0A\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception optique avancée\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e L'astrographe quintuplet FRA400 a adopté une conception optique moderne avec un pare-buée rétractable, un réducteur de haute précision à crémaillère de 3\" contenant un rotateur à 360 degrés, un filetage M68×1, une bague d'adaptation de 2\" et un 1,25\". adaptateur visuel.Le réducteur est équipé d'une fonction de réglage focal fin pour un calibrage plus précis dans l'observation pratique ou l'imagerie du ciel.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Aucune aberration chromatique\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e Il est excellent pour contrôler et éventuellement éviter les aberrations chromatiques. La qualité de l'image est également optimisée pour répondre à diverses fins d'observation ou d'imagerie.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Multifonctionnel\u003c\/h3\u003e\n\n\u003chr\u003e\n\n \u003cp\u003eIl convient de mentionner que le FRA 400\/5.6 dispose d'une paire d'anneaux de tubes brevetés, à la mode et multifonctionnels. Divers accessoires pratiques sont disponibles sur trois côtés des anneaux de tube, ce qui est vraiment pratique pour les activités pratiques d'observation ou d'imagerie.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Portable et polyvalent\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e L'astrographe portable et polyvalent peut être associé à de nombreux accessoires potentiels lors de votre observation ou de votre imagerie du ciel. C'est définitivement votre aide intime pour votre exploration.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Rapport focale rapide\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e F\/5,6 est un rapport focal relativement rapide pour une utilisation astrophotographique, mais nous proposons en outre un réducteur ultra focal pour satisfaire les besoins particuliers des imageurs expérimentés, réduisant considérablement le rapport focal pratique à f\/3,9. Cette combinaison inventive prend en charge l’imagerie plein format et peut réduire considérablement le temps d’exposition, ce qui constitue une conception pionnière dans le domaine de l’astrophotographie.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ctable class=\"specifications\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eFabricant\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Askar\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eOuverture\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 72mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eDistance focale\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 400mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eRapport focale\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e F\/5.6\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eType d'objectif\u003c\/b\u003e\n\u003c\/th\u003e\n\n \u003ctd\u003eQuintuplet double ED APO espacé dans l'air\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eCercle d'images\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Plein format 44 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eMise au point arrière\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 140 mm (à partir de l'extrémité du rotateur filetage M68x1)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eAdaptateur back-end\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Filetage mâle M68x1, adaptateur 2\"\/adaptateur 1,25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eLongueur totale\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 317mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003ePoids OTA\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 2,56 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003ePoids total (y compris l'anneau de tube et la plaque en queue d'aronde\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 2,88 kg \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Télescope FRA400\u003c\/li\u003e\n\n\u003cli\u003e Paire d'anneaux de tubes\u003c\/li\u003e\n\n\u003cli\u003e Poignée\u003c\/li\u003e\n\n\u003cli\u003e Plaque à queue d'aronde\u003c\/li\u003e\n\n\u003cli\u003e Carte de garantie\u003c\/li\u003e\n\n\u003cli\u003e Manuel \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967765082397,"sku":"ASK-FRA400","price":1679.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA400-1__17210.1610295680.1280.1280.jpg?v=1684345825"},{"product_id":"askar-fra600-108mm-f-5-6-quintuplet-apo","title":"Askar FRA600 108mm f\/5.6 Quintuplet APO","description":"\u003c!-- more --\u003e\u003cdiv\u003e\u003cspan\u003eAujourd'hui, Sharpstar annonce le plus récent ajout à sa série Askar FRA, l'Askar FRA600\/5.6.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cspan\u003eAprès les excellentes performances optiques de son premier FRA400\/5.6, le FRA600\/5.6 est une évolution de la série FRA, un objectif amélioré a\u003c\/span\u003e \u003cspan\u003eune ouverture de 108 mm et une distance focale de 600 mm, le f\/ratio est toujours f\/5.6, et l'\u003c\/span\u003e \u003cspan\u003eimage le cercle est de 66 mm dépasse le plein cadre !\u003c\/span\u003e\n\n\u003c\/div\u003e\n\u003cdiv align=\"center\"\u003e\u003ciframe src=\"\/\/www.youtube.com\/embed\/saNRBS695Dc\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\n\u003cspan\u003eCe réfracteur quintuplet FRA600 est construit sur une conception Petzval, comprenant un triplet avant et des lentilles doublet arrière, dont deux pièces sont en verre ED. Cette combinaison offre un haut niveau de performance apochromatique pour l'astroimagerie.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan\u003eAvec une conception optique merveilleuse, l'astrographe FRA600 fournit un cercle d'image de 66 mm pour assurer une excellente forme d'étoile sur tout le champ tout en contrôlant l'aberration chromatique, minimisant la distorsion.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eLes deux lentilles du groupe arrière ont un diamètre de 80 mm, contrebalançant efficacement l'effet de diminution de l'éclairage du champ. Grâce à la fabrication précise, ils obtiennent une netteté optimale presque au niveau théorique, vous apportant de belles images claires et détaillées avec des étoiles de forme ronde.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eLe FRA600 est livré avec un grand porte-oculaire de 4,2\" à base de crémaillère et d'engrenage qui comprend un bouton de réglage focal standard de 1:10, le porte-oculaire améliore considérablement la charge utile à un niveau professionnel, offrant un fonctionnement fluide sans glisser lorsque des équipements d'imagerie lourds et des accessoires sont ci-joint.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan\u003eLe porte-oculaire permet plusieurs connexions. En outre, Askar propose également une rallonge conique standard avec des filetages de M54 × 0,75 et M48 × 0,85 pour connecter divers équipements astrophotographiques.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eMécaniquement, le FRA600 a un diamètre de tube de 120 mm et un pare-buée rétractable. Avec le pare-buée rétracté, la longueur totale n'est que de 493 mm, ce qui en fait un excellent astrographe portable de 4 pouces.\u003cbr\u003e\u003cbr\u003e Un ensemble d'anneaux de tube anodisés rouges multifonctionnels comprend des points de montage sur trois côtés, ce qui facilite la fixation d'accessoires tels que la lunette de guidage pour l'observation de l'arrière-cour.\u003cbr\u003e\u003cbr\u003e En plus de prendre en charge l'astrophotographie à grand champ, le FRA600 est également parfait pour une observation de haute qualité, offrant une correction exquise des aberrations chromatiques et créant des images avec un contraste impressionnant comparable à une expérience visuelle.\u003cbr\u003e\u003c\/span\u003e \u003cbr\u003eL'excellente performance justifierait déjà son prix si le FRA600 n'était qu'un simple réfracteur triplet APO. Mais notre FRA600 est un Astrograph Quintuplet Super APO de 4,3\", son ingéniosité a déjà dépassé ses homologues tombant dans la même gamme de prix.\u003c\/div\u003e\n\u003cdiv\u003e \u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_askar_fra600_description_1.jpg?v=1684345810?t=1617811179\" alt=\"Askar FRA600 Description 1\" width=\"3082\" height=\"3300\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_askar_fra600_description_2.jpg?v=1684345812?t=1617811191\" alt=\"Dimensions de l'Askar FRA600\" width=\"1308\" height=\"986\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_askar_fra600_description_3.jpg?v=1684345814?t=1617811220\" alt=\"Lampe Askar FRA600\" width=\"950\" height=\"354\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_askar_fra600_description_4.png?v=1684345815?t=1617811242\" alt=\"Diagramme ponctuel Askar FRA600\" width=\"1000\" height=\"751\"\u003e\u003c\/span\u003e\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\u003cp\u003eOuverture : 108 mm\u003cbr\u003e Distance focale : 600 mm\u003cbr\u003e Rapport focal : F5.6\u003cbr\u003e Type d'objectif：APO à espacement aérien double ED quintuplé\u003cbr\u003e Cercle d'image : 66 mm\u003cbr\u003e Mise au point arrière : 160 mm (à partir de l'extrémité du filetage du rotateur M68x1)\u003cbr\u003e Longueur totale : 493 mm\u003cbr\u003e Poids : 6,5 kg\u003cbr\u003e Poids des options : 7,8 kg\u003cbr\u003e Adaptateur arrière : filetage mâle M108x1 (pas de rotateur), filetage mâle M90x1, adaptateur 2\"\/adaptateur 1,25\"\u003c\/p\u003e\n\n\u003cp\u003eAdaptateur conique : M90x1 à M54x0,75, M54x0,75 à M48x0,75\u003cbr\u003e Accessoires: une paire d'anneaux de tube pf, une poignée, une plaque à queue d'aronde, un adaptateur de tube conique sectionnel (avec filetage mâle M54x0,75 et M48x0,75), une liste d'inspection, un manuel. \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967778779421,"sku":"ASK-FRA600","price":3639.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA600-1__27560.1610296043.1280.1280.png?v=1684345835"},{"product_id":"askar-fra500-90mm-f-5-6-quintuplet-apo","title":"Askar FRA500 90mm f\/5.6 Quintuplet APO","description":"\u003cul\u003e\n\n\u003cli\u003eCompact et portable\u003c\/li\u003e\n\n\u003cli\u003e Imagerie de haute qualité\u003c\/li\u003e\n\n\u003cli\u003e Mise au point de précision\u003c\/li\u003e\n\n\u003cli\u003e Conception élégante\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description\u003c\/li\u003e\n\n\u003cli\u003e Caractéristiques \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\" style=\"text-align: justify;\"\u003e\n\n\u003cp\u003e\n Sharpstar Optics est fier de présenter l'astrographe Askar FRA500, le dernier ajout à la célèbre famille FRA. Avec une distance focale de 500 mm et une ouverture de 90 mm (f\/5,6), l'Askar FRA500 est mieux adapté à l'imagerie du ciel profond que l'Askar FRA400. De plus, sa conception plus légère et plus compacte en fait un excellent choix pour l'observation en extérieur et l'astrophotographie, surtout par rapport à l'Askar FRA600.\n\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Présentation de l'Askar FRA500 : léger et polyvalent pour l'imagerie du ciel profond \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-FRA500__40204.1641245267.1280.1280_600x600.jpg?v=1684347331\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nL'Askar FRA500 perpétue l'héritage de conception supérieure de la série FRA. Il présente une structure optique APO quintuplée à espacement d'air avec une combinaison de lentilles Petzval « trois plus deux ». Le groupe de lentilles avant se compose de trois lentilles, dont deux éléments en verre ED, offrant une excellente correction des aberrations. Le groupe arrière comporte deux lentilles séparées par un petit espace, garantissant une netteté sur toute l’image. Cette conception élimine pratiquement toutes les étoiles floues sur les bords de l'image. Le FRA500 prend en charge un impressionnant cercle d’image de 55 mm, beaucoup plus grand que le cercle d’image plein format standard de 44 mm. Sa conception spéciale de mise au point arrière élimine le besoin de calculer des distances de mise au point arrière déroutantes ou de rechercher la bonne entretoise. Tout ce que vous avez à faire est de vous concentrer sur la netteté de votre cible.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Élégance pratique : conception et construction de l'Askar FRA500 \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nAskar FRA500 est typiquement un merveilleux mélange de pragmatisme et d’esthétique. L'astrographe montre des lignes douces et une bonne disposition des composants. De face, l'Askar FRA500 possède un impressionnant pare-rosée décoré d'un anneau de lunette rouge vif classique. La longueur totale du FRA500 est de 452 mm lorsque le pare-buée est étendu et de 410 mm lorsqu'il est replié. À l'extrémité arrière de l'astrographe se trouve un porte-oculaire de 3,5\" massivement construit avec des boutons manuels à double vitesse (deux boutons pour un réglage grossier et un bouton de réglage fin 1:10), qui est d'une grande utilité dans l'observation réelle ou l'astrophotographie. L'astrographe porte un revêtement lisse et est uniformément fini. La graduation à l'intérieur du porte-oculaire est assez claire et facilement lisible. Le porte-oculaire est résistant et solide, et sur le côté gauche, il y a une base de recherche standard avec une vis à pouce argentée. Le FRA500 peut transporter des chercheurs, des guides ou d'autres accessoires d'astronomie potentiels. L'Askar FRA500 est également livré avec une paire d'anneaux de tube très recherchés. Sur le dessus des anneaux de tube est attachée une poignée et en bas, il y a une queue d'aronde de style Askar Losmandy. La combinaison d'un tube principal blanc laiteux et d'un pare-buée ainsi que d'un porte-oculaire noir piano brillant rend l'ensemble du tube optique calme et profond, ce qui est compensé par l'anneau décoratif rouge vif et les anneaux du tube. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/files\/68200961-7105-4ec5-a694-e825ab96d171_902x639.jpg?v=1722449075\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Compact et portable : l'Askar FRA500 pour l'astrophotographie en déplacement \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/files\/c8e2b9f1-0f48-47c5-8eac-571ac50b628e_902x464.jpg?v=1722449074\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n L'Askar FRA500, mesurant 410 mm de longueur et pesant environ 4 kg, est pratique à transporter et à monter sur un support EQ. Il convient particulièrement aux passionnés d'astronomie qui partent souvent en voyage sur de longues distances ou pratiquent l'astrophotographie en plein air. L'Askar FRA500, ainsi que le reste de la famille FRA, est apprécié pour sa grande ouverture, sa vitesse rapide, son système de mise au point délicat, sa conception optique unique et ses résultats d'imagerie de haute qualité. Nous espérons que l'Askar FRA500 deviendra un fidèle compagnon dans votre voyage astrophotographique. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli class=\"specifications\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eOuverture\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 90mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eDistance focale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 500mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eRapport focale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e f\/5.6\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eObjectif\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e APO quintuplé à espacement d'air (comprenant deux verres ED)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eCercle d'images\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 55mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cul\u003e\n\n\t\t\t\t\t\t\t \u003cli\u003e158 mm (de la base du filetage M48 × 0,75 sur l'extension conique au plan focal)\u003c\/li\u003e\n\n\u003cli\u003e 85 mm (de la base du filetage M86 × 1 sur le rotateur au plan focal)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003ePoids OTA\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 4,1 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003ePoids total (y compris l'anneau de tube et la plaque à queue d'aronde)\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 5,2kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eType de filetage arrière\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 86x1\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eAdaptateur conique\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 48x0,75\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eArticles du paquet\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e 1 x FRA500OTA\u003c\/li\u003e\n\n\u003cli\u003e 1 x paire d'anneaux de tube\u003c\/li\u003e\n\n\u003cli\u003e 1 x poignée\u003c\/li\u003e\n\n\u003cli\u003e 1 x plaque à queue d'aronde Askar Losmandy\u003c\/li\u003e\n\n\u003cli\u003e 1 x rallonge conique\u003c\/li\u003e\n\n\u003cli\u003e 1 x Manuel \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967965425949,"sku":"ASK-FRA500","price":2799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA500__40204.1641245267.1280.1280.jpg?v=1684347331"},{"product_id":"askar-fra300-60mm-f-5-quintuplet-apo","title":"Askar FRA300 Pro 60 mm f\/5 Quintuplet APO","description":"\u003cul\u003e\n\n\u003cli\u003e\n\n60 mm f\/5 Quintuplet APO\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n Cercle d'image à champ plat de 44 mm\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n Distance focale de 300 mm\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n Porte-oculaire à crémaillère et pignon de 2,5\" avec rotateur \n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description\u003c\/li\u003e\n\n\u003cli\u003e Caractéristiques\u003c\/li\u003e\n\n\u003cli\u003e Dans la boite\u003c\/li\u003e\n\n\u003cli\u003e Manuels et téléchargements \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\"\u003e\n\n\u003ch3\u003e Découvrez l'Askar FRA300 Pro - Le premier choix des astronomes amateurs\u003c\/h3\u003e\n\n\u003cdiv style=\"text-align: justify;\"\u003e\n\n\u003cp\u003e\n Élevez votre astrophotographie avec l'Askar FRA300 Pro, un ajout révolutionnaire à la célèbre série Askar FRA. Cet astrographe de pointe, avec son rapport focal court, est rapidement devenu un favori parmi les astronomes amateurs et les passionnés d'astrophotographie. Le FRA300 Pro se distingue comme le plus petit astrographe Petzval 60 mm F\/5 de la série, offrant une vitesse et une précision inégalées avec une distance focale de 300 mm.\n\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e\n\n Qualité d'image exceptionnelle \n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Avec un rayon RMS atteignant 2 µm au niveau du champ central, le FRA300 Pro fournit des images d'étoiles remarquablement nettes et délicates, répondant aux besoins des astronomes sérieux. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"image-side-2\" data-mce-style=\"text-align: start;\" style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\u0026lt;!--nl--\u0026gt;Askar FRA300 Pro 60 mm f\/5 Quintuplet APO\u0026lt;!--nl--\u0026gt;       \" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-FRA300-Pro-1__97100.1656532375.1280.1280_600x600.jpg?v=1684348071%0A\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception optique avancée\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\t\t\t\t \u003cp\u003eL'objectif quintuplet entièrement espacé d'air, comprenant un verre ED avec revêtement multicouche complet, élimine efficacement la lumière parasite et optimise la clarté de l'image.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Polyvalent et convivial\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e Conçu pour une compatibilité plein format, prenant en charge un cercle d'imagerie de 44 mm, le FRA300 Pro est une perle rare pour l'astronomie amateur. Son rapport focal F\/5 réduit considérablement les temps d'exposition par rapport aux modèles F\/6 ou F\/7, capturant plus efficacement des images époustouflantes.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception Petzval innovante\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e La conception native de Petzval simplifie les réglages du backfocus, garantissant un positionnement optimal dans une plage spécifique pour une facilité d'utilisation et une précision.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Construction mécanique robuste\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e Fabriqué avec des composants usinés CNC de haute qualité, finis avec un revêtement par pulvérisation lisse et une légère oxydation, le FRA300 Pro allie esthétique et praticité. Sa conception légère et élégante en anneau tubulaire améliore l’expérience globale.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Mécanisme de mise au point de précision\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\t\t\t\t \u003cp\u003eLe porte-oculaire à crémaillère de 2,5\", doté de boutons à double vitesse et d'un rotateur à 360°, offre des réglages de mise au point méticuleux et un positionnement d'angle flexible, complétés par des adaptateurs M54X0,75 et M48X0,75 pour une large compatibilité.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Portable et équilibré\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e La poignée multifonction incluse et la plaque en queue d'aronde de style Vixen de 300 mm facilitent la connexion à divers supports et accessoires, garantissant une configuration équilibrée.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Le compagnon d'astrophotographie ultime à un prix rentable\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e L'Askar FRA300 Pro est plus qu'un simple astrographe ; cela témoigne de l'engagement d'Askar envers la qualité et l'innovation en astrophotographie. Avec ses performances supérieures, ses fonctionnalités conviviales et son design exquis, le FRA300 Pro est en passe de devenir votre assistant d'astrophotographie indispensable. Qu'il s'agisse de capturer des merveilles du ciel profond ou des événements célestes, l'astrographe Askar FRA300 Pro est conçu pour dépasser les attentes, ce qui en fait le choix idéal pour les astronomes chevronnés et ceux qui débutent dans le domaine.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ctable class=\"specifications\"\u003e\n\n\u003ctr\u003e\n\n\t\t\t\t\t\t \u003cth\u003e\u003cb\u003eFabricant\u003c\/b\u003e\u003c\/th\u003e\n\n\u003ctd\u003e Askar\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eOuverture\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 60mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eDistance focale\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 300 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eRapport focale\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e F\/5\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eType d'objectif\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Quintuplet Petzval APO entièrement espacé d'air (incluant un verre ED)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eCercle d'images\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Plein format 44 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eConnexion maximale des accessoires (avec le porte-oculaire complètement retiré)\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Mode d'imagerie :\u003cbr\u003e\n 71 mm (à partir de la base du filetage mâle M42 × 0,75)\u003cbr\u003e\n 67 mm (à partir de la base du filetage mâle M48 × 0,75)\u003cbr\u003e\n 71 mm (à partir de la base du filetage mâle M54×1)\u003cbr\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eLongueur totale\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 303mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003ePoids OTA\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 2,26kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003ePoids total (y compris l'anneau de tube et la plaque en queue d'aronde\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e 3,12kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003e \u003cb\u003eFiletage arrière\u003c\/b\u003e\n\u003c\/th\u003e\n\n\u003ctd\u003e Filetage mâle M48*0,75\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Télescope FRA300\u003c\/li\u003e\n\n\u003cli\u003e Anneau de télescope\u003c\/li\u003e\n\n\u003cli\u003e Poignée\u003c\/li\u003e\n\n\u003cli\u003e Plaque à queue d'aronde série V de 300 mm\u003c\/li\u003e\n\n\u003cli\u003e Adaptateur M42x0,75\u003c\/li\u003e\n\n\u003cli\u003e Adaptateur M54x0,75\u003c\/li\u003e\n\n\u003cli\u003e Carte de garantie\u003c\/li\u003e\n\n\u003cli\u003e Manuel\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\t\t \u003cp\u003eCliquez ici pour voir le manuel d'utilisation de l'Askar FRA300 Pro\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44968028897565,"sku":"ASK-FRA300","price":1329.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-FRA300-Pro-1__97100.1656532375.1280.1280.jpg?v=1684348071"},{"product_id":"askar-107phq-f-7-quadruplet-apo","title":"Askar 107PHQ f\/7 Quadruplet APO","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003eEn tant que premier astrographe Flatfield à rapport focal long d'Askar, 107PHQ est né avec une mission spéciale : que vous débutiez en astrophotographie,\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eou un passionné qui connaît bien tous les équipements et appareils, vous pouvez toujours trouver Askar 107PHQ un astrographe utile qui est fonctionnellement pratique et physiquement attrayant.\u003c\/span\u003e \u003cbr\u003e\u003cspan\u003eIl est particulièrement adapté aux amateurs ou aux débutants, car vous n'avez pas besoin de fixer un aplatisseur de champ supplémentaire pour obtenir une image satisfaisante. Et pour le fait que vous n'avez pas besoin d'aplatisseur et que vous pouvez facilement surmonter le calcul de la mise au point arrière\u003c\/span\u003e\u003cbr\u003e \u003cspan\u003eet des étapes de connexion déroutantes, tout ce que vous avez à faire est d'équiper votre 107PHQ de tous les dispositifs d'imagerie possibles, de faire en sorte que la cible reste au point, puis l'ensemble du système optique est parfait pour l'imagerie.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"center\"\u003e Askar 107PHQ, un polyvalent polyvalent\u003cbr\u003e Askar 107PHQ peut littéralement être appliqué dans toutes les situations imaginables, et c'est la principale raison pour laquelle 107PHQ est produit : pour réduire autant que possible les problèmes des utilisateurs.\u003c\/div\u003e\n\u003cdiv align=\"center\"\u003e\u003cdiv\u003e\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_1642399630.png?v=1684348057\" alt=\"Y compris le tube de connexion de prise de vue\"\u003e\u003cdiv\u003e Y compris le tube de connexion de prise de vue\u003c\/div\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_1642399648.png?v=1684348059\" alt=\"Y compris l'interface de 2 pouces\"\u003e\u003cdiv\u003e Y compris l'interface de 2 pouces\u003c\/div\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv class=\"main\"\u003e\u003cdiv class=\"row-b1\"\u003e\u003cdiv class=\"wp\"\u003e\n\n\u003cdiv\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"col-r\"\u003e\u003cdiv class=\"m-txt2\"\u003eL'Askar 107PHQ peut capturer de minuscules étoiles grâce à sa distance focale de 740 mm et à sa capacité d'aplatissement de champ étonnante. Lorsqu'il est utilisé Askar 107PHQ et une caméra haute résolution, il peut toujours faire ressortir de nombreuses informations détaillées sur votre cible.\u003cbr\u003e Askar 107PHQ est également un bon choix pour votre observation visuelle. Il s'adapte aux miroirs zénithaux de 1,25\", 2\" ainsi qu'à divers oculaires et peut obtenir une mise au point parfaite. Il peut même être utilisé pour observer des planètes avec un oculaire à très fort grossissement. \u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240208671.jpg?v=1684348065\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e Askar 107PHQ, un astrographe f\/7, contient quatre lentilles dont deux en verre ED, qui peuvent mieux réduire l'aberration chromatique. Il peut obtenir une excellente correction des couleurs même avec un grossissement de 300× en observation visuelle. \u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240654614.jpg?v=1684348072\" alt=\"\"\u003e\u003cbr\u003e \u003cbr\u003eL'élégant 107PHQ est assemblé avec des composants usinés CNC de haute qualité et enveloppé d'un revêtement lisse. Le calme et le sérieux sont contrebalancés par les anneaux ou boutons décoratifs vert vif. Le porte-oculaire rigide de 3,4\" est capable de supporter une charge de 8 kg. Il est conçu avec une longue distance de déplacement de 95 mm, ce qui convient à l'observation visuelle. Et il a été spécialement optimisé pour l'astrophotographie. \u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240227992.png?v=1684348076\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e L'objectif Flatfield intégré est une grande contribution à la capacité d'imagerie de l'Askar 107PHQ. Il prend en charge l'imagerie plein format 44 mm. Les étoiles au coin des images souffrent rarement de distorsion ou de déformation. Au centre de son champ de vision, le rayon RMS n'est que de 3um. Même un utilisateur exigeant peut également être rassasié en ce qui concerne la forme des étoiles. L'Askar 170PHQ peut gérer efficacement les problèmes de courbure de champ et de vignette. \u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240248855.jpg?v=1684348105\" alt=\"\"\u003e\u003cbr\u003e \u003cbr\u003eLe package standard comprend un OTA Askar 107PHQ, un ensemble d'adaptateurs M86-M48 en quatre pièces, une paire d'anneaux de tube, une plaque à queue d'aronde de style Askar Vixen de 300 mm et une valise en aluminium de haute qualité. \u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240303530.jpg?v=1684348111\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv\u003e Taille d'ouverture : 107 mm\u003cbr\u003e Distance focale：749mm\u003cbr\u003e Rapport focal：f\/7\u003cbr\u003e Lentille d'objectif : APO à espacement aérien quadruple (y compris deux verres ED)\u003cbr\u003e Cercle d'image：44mm\u003cbr\u003e Connexion d'accessoires maximale (avec le porte-oculaire entièrement retiré)：\u003cbr\u003e 1. Mode d'imagerie :\u003cbr\u003e 79 mm (à partir de la base du filetage mâle M48 × 0,75)\u003cbr\u003e 99 mm (à partir de la base du filetage mâle M54 × 0,75)\u003cbr\u003e 119 mm (à partir de la base du filetage M68 × 1 mâle)\u003cbr\u003e 149 mm (à partir de la base du filetage mâle M86 × 1)\u003cbr\u003e 2. Mode d'observation :\u003cbr\u003e 120mm (à partir de la fin du dos visuel de 2 \")\u003cbr\u003e Longueur totale : 603 mm (lorsque le pare-buée est contracté)\u003cbr\u003e 754 mm (lorsque le pare-buée est étiré)\u003cbr\u003e Poids net : 5,7 kg\u003cbr\u003e Poids brut : 6,9 kg\u003cbr\u003e Type de filetage arrière：M86×1 à M68×1\u003cbr\u003e M68×1 à M54×0.75\u003cbr\u003e M54×0.75 à M52×0.75\u003cbr\u003e M52 × 0,75 à M48 × 0,75 (avec filetage de filtre M48 × 0,75)\u003cbr\u003e Adaptateur photographique en quatre parties : M48 × 0,75 \u003cbr\u003eArticles de l'emballage standard : un OTA 107PHQ, une paire d'anneaux de tube, une poignée, une plaque à queue d'aronde Askar 300 mm Vixen, un ensemble d'adaptateurs photographiques en quatre pièces, un manuel.\u003c\/div\u003e\n\n\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164247146934.jpg?v=1684348114\" alt=\"\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240695651.jpg?v=1684348129\" alt=\"\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240495493.jpg?v=1684348138\" alt=\"\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_164240496642.jpg?v=1684348145\" alt=\"\"\u003e\n\n\u003c\/div\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44968035516701,"sku":"ASK-107PHQ","price":3219.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-107PHQ-1__20124.1657565714.1280.1280.jpg?v=1684348151"},{"product_id":"askar-130phq-f-7-quadruplet-apo","title":"Askar 130PHQ f\/7 Quadruplet APO","description":"\u003cdiv align=\"center\"\u003e130PHQ est un astrographe à champ plat à longue focale nouvellement lancé après 107PHQ. Au lieu d'acheter des aplatisseurs supplémentaires, de calculer la mise au point de l'aplatisseur ou d'effectuer une connexion fastidieuse pour correspondre à la distance, les astrophotographes peuvent simplement l'équiper de tous les dispositifs d'imagerie possibles, faire en sorte que la cible reste au point, et l'ensemble du système optique est alors parfait pour l'imagerie. \u003c\/div\u003e\n\n\u003cdiv align=\"center\"\u003e\n\n\u003cdiv\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_1657695902.png?v=1684348187\" alt=\"\"\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cp\u003e Le 130PHQ a une taille plus grande que le 107PHQ, avec une ouverture de 23 mm plus grande que le 107PHQ. Le 130PHQ a un rapport focal de f\/7,7 qui est plus long que le 107PHQ' sf\/7 et une distance focale de 1 000 mm. L'objectif quadruplet avec deux lunettes ED offre un excellent contrôle des aberrations chromatiques et autres. Avec sa conception auto-aplatissante, le 130PHQ offre de solides avantages en matière de prise de vue astronomique. Il prend en charge un cercle d'image à cadre moyen de 60 mm, possède un diagramme de points fins avec une minuscule distorsion des étoiles périphériques et son rayon RMS central est inférieur à 2 microns. \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"main\"\u003e\n\n\u003cdiv class=\"row-b1\"\u003e\n\n\u003cdiv class=\"wp\"\u003e\n\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"col-r\"\u003e\n\n\u003cdiv class=\"m-txt2\"\u003e\n\n\u003cdiv\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_165769552281.jpg?v=1684348192\" alt=\"\"\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_165846786977.jpg?v=1684348199\" alt=\"\"\u003e\u003cbr\u003e \u003cbr\u003eLe 130PHQ est livré avec un pare-soleil télescopique, un tube usiné et peint CNC de haute qualité et des pièces décoratives attrayantes. Le porte-oculaire rigide de 3,4\" est livré avec des adaptateurs M68, M54 et M48 et une base de recherche. Lorsqu'il est utilisé avec le réducteur de champ plat 3\" 0,7 x, le télescope peut atteindre un rapport focal de f\/5,4 et une longueur focale de 700 mm, efficacement réduisant le temps d'exposition. La poignée multifonctionnelle est livrée avec une fente centrale pour fixer une vis M6 avec un trou de vis M6. La plaque à queue d'aronde standard Losmandy, associée à un anneau double tube robuste, est parfaitement adaptée à l'observation et à la prise de vue. \u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_3_6_.jpg?v=1684348203\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e Taille d'ouverture: 130 mm\u003cbr\u003e Distance focale : 1000 mm\u003cbr\u003e Rapport focale : f\/7,7\u003cbr\u003e Objectif : APO quadruplet à espacement d'air (y compris deux verres ED)\u003cbr\u003e Cercle d'image : 60 mm.\u003cbr\u003e Connexion maximale des accessoires (avec le porte-oculaire complètement retiré) :\u003cbr\u003e 1. Mode d'imagerie :\u003cbr\u003e 116 mm (à partir de la base du filetage mâle M48 × 0,75)\u003cbr\u003e 136 mm (à partir de la base du filetage mâle M54 × 0,75)\u003cbr\u003e 156 mm (à partir de la base du filetage mâle M68 × 1)\u003cbr\u003e 186 mm (à partir de la base du filetage mâle M86 × 1)\u003cbr\u003e 2. Mode d'observation : \u003cbr\u003e148,5 mm (à partir de l'extrémité du support d'oculaire de 2\")\u003cbr\u003e Longueur totale:\u003cbr\u003e 842,5 mm (y compris un support d'oculaire de 1,25\" comme pare-buée contracté)\u003cbr\u003e 889,5 mm (y compris un support d'oculaire de 1,25\" comme pare-buée entièrement étiré)\u003cbr\u003e 1011,5 mm (y compris l'adaptateur en 4 pièces comme pare-buée contracté)\u003cbr\u003e 1061,5 mm (y compris l'adaptateur en 4 pièces comme pare-buée entièrement étiré)\u003cbr\u003e Poids net ： 10,2 kg\u003cbr\u003e Poids brut ： 12,5 kg\u003cbr\u003e Type de filetage arrière :\u003cbr\u003e M86×1-M68×1\u003cbr\u003e M68×1-M54×0,75\u003cbr\u003e M54×0,75-M54×0,75\u003cbr\u003e M54 × 0,75-M48 × 0,75 (filetage de filtre M48 × 0,75 à l'intérieur)\u003cbr\u003e Éléments de l'emballage standard : un OTA 130PHQ, une paire d'anneaux de tube, une poignée, une plaque en queue d'aronde Askar Losmandy de 300 mm, un jeu d'adaptateurs photographiques de 4 pièces, un manuel, une boîte en aluminium \u003c\/div\u003e\n\n\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_165776353417.jpg?v=1684348207\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_165769561497.jpg?v=1684348211\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_165769563099.jpg?v=1684348215\" alt=\"\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_165769563876.jpg?v=1684348219\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44968043282717,"sku":"ASK-130PHQ","price":4899.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-130PHQ-Quadruplet-APO__33186.1661624750.1280.1280.jpg?v=1684348250"},{"product_id":"askar-80phq-f-7-quadruplet-apo","title":"Askar 80PHQ f\/7 Quadruplet APO","description":"\u003cul\u003e\n\n\u003cli\u003e\n\n Ouverture de 80 mm, réfracteur apochromatique quadruplet à rapport focal f\/7\n\n\u003c\/li\u003e\n\n\u003cli\u003e \nConçu pour l'astrophotographie et l'observation visuelle de haute qualité \n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\"\u003e\n\n\u003cp\u003e\n L'Askar 80PHQ f\/7 Quadruplet APO est un télescope réfracteur apochromatique haut de gamme conçu à la fois pour l'astrophotographie et l'observation visuelle. Avec son ouverture de 80 mm et son rapport focal f\/7, ce télescope offre un excellent équilibre entre puissance de collecte de lumière et champ de vision, ce qui le rend idéal pour capturer des objets du ciel profond à grand champ et pour une observation planétaire à contraste élevé. \n\u003c\/p\u003e\n\n\u003cdiv class=\"warning\"\u003e\n\n\u003cimg alt=\"Clause de non-responsabilité\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" width=\"25px\"\u003e\n\u003cp\u003e\n Des accessoires supplémentaires peuvent être nécessaires pour une utilisation optimale en astrophotographie. Vérifiez la compatibilité avec votre équipement existant.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e\n\n Conception optique \n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le 80PHQ présente une conception sophistiquée d'objectif quadruplet, intégrant quatre éléments alignés avec précision pour offrir une correction des couleurs supérieure et des images nettes et contrastées. Cette conception apochromatique élimine efficacement l'aberration chromatique, garantissant des couleurs fidèles à la réalité dans les applications visuelles et photographiques. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"image-side-2\" data-mce-style=\"text-align: start;\" style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"Askar 80PHQ f\/7 Quadruplet APO\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-80PHQ__46044.1678413489.1280.1280_600x600.jpg?v=1684348359\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv data-mce-style=\"backgroundcolor: #0a0001; border-radius: 5px;\" style=\"background-color: #0a0001; border-radius: 5px;\"\u003e\n\n\u003ch3 style=\"color: white!important;\"\u003e\n\n Performances d'imagerie \n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"image-side-2\" data-mce-style=\"text-align: start;\" style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"Askar 80PHQ f\/7 Quadruplet APO\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-80PHQ__46044.1678413489.1280.1280_600x600.jpg?v=1684348359\" style=\"margin-bottom: 16px; float: none;\"\u003e \n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp style=\"color: white!important;\"\u003e\n Avec son ouverture de 80 mm et sa focale de 560 mm (f\/7), le 80PHQ excelle en astrophotographie grand champ. Il est particulièrement adapté à la capture de grandes nébuleuses, d'amas d'étoiles et de vastes champs de galaxies. Le rapport focal rapide f\/7 permet des temps d'exposition plus courts, ce qui facilite la collecte de données même dans des conditions de ciel loin d'être idéales.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3\u003e Qualité de fabrication\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Construit avec des matériaux de haute qualité, notamment un tube en aluminium usiné avec précision et un pare-buée. La construction robuste assure la stabilité et minimise la flexion, essentielle pour l'astrophotographie à longue exposition et les observations visuelles précises.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Focuseur\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Équipé d'un porte-oculaire à double vitesse de haute précision, permettant les réglages fins nécessaires pour obtenir une mise au point parfaite dans les applications visuelles et photographiques. Le porte-oculaire est conçu pour gérer de lourdes charges utiles d’imagerie sans glisser.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Polyvalence\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e \nBien qu'optimisé pour l'astrophotographie, l'Askar 80PHQ excelle également dans les observations visuelles. Il offre des vues à grand champ à couper le souffle des champs d'étoiles, des nébuleuses et des objets plus grands du ciel profond, ainsi que des vues détaillées de la Lune et des planètes.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Portabilité\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Avec sa taille compacte et sa conception légère, le 80PHQ est hautement portable, ce qui en fait un excellent choix pour les astronomes qui se rendent fréquemment sur des sites de ciel sombre ou qui pratiquent l'astrophotographie mobile.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Accessoires et compatibilité\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Le télescope est généralement équipé de connexions standard pour fixer divers accessoires. Il est compatible avec une large gamme d'équipements d'astrophotographie, notamment des aplatisseurs de champ, des réducteurs de focale et des adaptateurs d'appareil photo. Vérifiez le contenu spécifique du package et votre équipement existant pour connaître tous les détails de compatibilité.\n\u003c\/p\u003e\n\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44968051310877,"sku":"ASK-80PHQ","price":2099.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-80PHQ__46044.1678413489.1280.1280.jpg?v=1684348359"},{"product_id":"askar-v-60-80mm-modular-telescope","title":"Télescope modulaire Askar V 60\/80 mm","description":"\u003cul\u003e\n\n\u003cli\u003e Basculer entre 60 mm et 80 mm\u003c\/li\u003e\n\n\u003cli\u003e Images nettes et contrastées.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\" style=\"text-align: justify;\"\u003e\n\n\u003cp\u003e \nDécouvrez la polyvalence et la précision inégalées du télescope modulaire Askar V 60\/80 mm. Conçu pour les astrophotographes débutants et expérimentés, ce télescope offre une conception modulaire unique, vous permettant de basculer facilement entre les configurations 60 mm et 80 mm. Que vous capturiez des images grand champ à couper le souffle ou que vous vous concentriez sur des objets détaillés du ciel profond, l'Askar V 60\/80 mm s'adapte parfaitement à vos besoins.\n\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception modulaire \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Basculez facilement entre les configurations 60 mm et 80 mm pour une imagerie polyvalente. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-V__51860.1682951859.1280.1280_832x832.jpg?v=1684348980\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Optique \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/files\/8c972f65-06f6-4045-b0d3-b318018b9252_799x596.png?v=1722442088\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Les revêtements multicouches garantissent des images nettes et contrastées.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Construction \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Parfait pour les voyages et les séances d'astrophotographie en déplacement.\n\u003c\/p\u003e\n\n\u003cp\u003e\n Les matériaux durables garantissent des performances durables.\n\u003c\/p\u003e\n\n\u003cp\u003e\n Compatible avec une gamme d'accessoires et de supports pour une fonctionnalité améliorée. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/files\/8bd07263-c9b9-4826-b82b-c43389b696a2_799x596.png?v=1722442088\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\t\t\t \u003ch3\u003ePourquoi choisir le télescope modulaire Askar V 60\/80 mm ? \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/files\/165c6ea9-68a1-4678-a4c8-875822a38dac_799x596.png?v=1722442088\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le télescope modulaire Askar V 60\/80 mm se distingue dans le monde de l'astrophotographie par sa flexibilité et sa précision. La possibilité de basculer entre différentes distances focales signifie que vous pouvez capturer une plus grande variété d'objets célestes avec un seul télescope. Sa conception légère en fait un excellent choix pour les astrophotographes qui aiment explorer différents endroits. De plus, les optiques de haute qualité garantissent que chaque image que vous capturez est nette et claire.\n\u003c\/p\u003e\n\n\u003cbr\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Parfait pour tous les astrophotographes \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Que vous commenciez tout juste votre voyage en astrophotographie ou que vous soyez un professionnel chevronné, le télescope modulaire Askar V 60\/80 mm est un excellent ajout à votre équipement. Sa conception facile à utiliser et ses performances supérieures en font un favori des passionnés et des professionnels. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/Askar-V__51860.1682951859.1280.1280_832x832.jpg?v=1684348980\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44968091287837,"sku":"ASK-ASKARV80","price":2611.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Askar-V__51860.1682951859.1280.1280.jpg?v=1684348980"},{"product_id":"askar-103apo-f-6-8-triplet","title":"Askar 103APO f\/6.8 Triplet","description":"\u003cul\u003e\n\n\u003cli\u003e Caractéristique de conception du tube d'objectif amovible\u003c\/li\u003e\n\n\t \u003cli\u003eOuverture de 103 mm, distance focale de 700 mm et rapports focaux natifs de 6,8\u003c\/li\u003e\n\n\u003cli\u003e APO triplet à espacement d'air (incluant un verre ED)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description\u003c\/li\u003e\n\n\u003cli\u003e Caractéristiques\u003c\/li\u003e\n\n\u003cli\u003e Dans la boite \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\" style=\"text-align: justify;\"\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n L'Askar 103APO a une ouverture de 103 mm, une distance focale de 700 mm et un rapport focal natif de 6,8 OTA.\n\u003cbr\u003e\n En astrographes, la taille de l’ouverture a un impact significatif sur l’observabilité et la qualité de l’image. L'ouverture de 103 mm lui confère un avantage inhérent en termes de puissance de collecte de lumière, de résolution, de luminosité et de contraste, permettant au photographe de collecter plus de lumière et de présenter plus de détails et d'objets plus lumineux dans l'image.\n\u003cbr\u003e\n Askar 103APO adopte une conception de lentille APO triple à espacement d'air, comprenant une pièce de verre ED.\n\u003cbr\u003e \nLe télescope APO (apochromatique) est un type de télescope capable de corriger l'aberration chromatique. L'aberration chromatique est une aberration optique courante qui provoque des bords colorés ou un flou autour des bords des objets dans une image. D'autres télescopes ont des conceptions optiques relativement simples et sont sujets à l'aberration chromatique, en particulier à fort grossissement ou dans les observations où la précision des couleurs est requise. Cependant, les télescopes APO utilisent des conceptions optiques spéciales et plusieurs éléments de lentilles pour corriger l'aberration chromatique, offrant ainsi naturellement des détails d'objet et une précision des couleurs de meilleure qualité.\n\u003cbr\u003e\n Dans la structure des éléments du réfracteur, l'augmentation du nombre d'éléments de lentille et la conception de combinaisons de lentilles peuvent améliorer efficacement la correction de l'aberration chromatique. Cependant, cela signifie également une augmentation des coûts de production et une complexité de conception.\n\u003cbr\u003e \nLe verre ED, également connu sous le nom de verre à faible dispersion, est un type de verre optique spécialement conçu pour réduire l'aberration chromatique. L'aberration chromatique se produit parce que la lumière de différentes longueurs d'onde se réfracte différemment lorsqu'elle traverse une lentille, entraînant une séparation des couleurs et une diminution de la qualité de l'image. Le verre ED possède des propriétés optiques spéciales qui aident à réduire la lumière parasite et à minimiser efficacement l'aberration chromatique.\n\u003cbr\u003e\n L'Askar 103APO adopte non seulement une conception de lentille triplet (alors que les astrographes économiques du marché utilisent généralement un doublet), mais il dispose également d'un verre ED pour améliorer encore la qualité de l'image. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/85033ec3-b08b-4cee-80e4-8e5fbe75a031.jpg?v=1722016068\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_1.43.36_PM.png?v=1722016228\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n En plus de l'objectif soigneusement conçu lui-même, chaque aspect de l'Askar 103APO est dédié à offrir une meilleure expérience de prise de vue aux utilisateurs.\n\u003cbr\u003e \nTout l'intérieur du pare-buée de l'Askar 103APO est recouvert de feutre mat, tandis que les parois intérieures du tube principal sont recouvertes de peinture mat et équipées du déflecteur interne. Cela réduit efficacement la diffusion et la réflexion de la lumière à l’intérieur de l’OTA, améliorant ainsi la luminosité, le contraste et la résolution des cibles observées.\n\u003cbr\u003e\n Chaque pièce d'Askar 103APO est équipée d'un anneau nominatif unique pour l'identification, ce qui rend chaque télescope Askar 103APO exclusif à son propriétaire.\n\u003cbr\u003e\n La conception rétractable du pare-buée, ainsi que les vis de verrouillage agrandies, permettent une utilisation pratique. Le pare-buée a pour but de protéger l'objectif de l'impact de la lumière externe et interne et de protéger l'objectif lui-même.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception OTA \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nSur l'Askar 103APO, il y a un total de deux bases de recherche. Chaque côté du porte-oculaire est équipé d'une base de recherche. De nombreux utilisateurs ont exprimé leurs inquiétudes concernant l'espace limité pour installer des accessoires astronomiques supplémentaires au cours de l'utilisation. Pour résoudre ce problème, nous avons spécialement installé des bases de recherche des deux côtés du porte-oculaire. Cela élimine non seulement le besoin de démontage lors du changement de position du chercheur, mais fournit également des positions de montage supplémentaires pour d'autres accessoires astronomiques.\n\u003cbr\u003e\n La poignée de l'Askar 103APO a une conception de fente spéciale, ce qui en fait également une base pour l'installation d'un chercheur. La poignée elle-même est robuste et durable.\n\u003cbr\u003e\n La conception globale des anneaux tubulaires est légère, avec un poids total de seulement 750 g. La vis moletée de l'anneau du tube permet une ouverture et un verrouillage faciles. En même temps, la base surélevée crée plus d’espace pour accueillir des accessoires astronomiques. Au quotidien, la commodité de chaque étape est prise en compte.\n\u003cbr\u003e \nLa plaque à queue d'aronde est la plaque à queue d'aronde Vixen standard, compatible avec la plupart des montures et bases équatoriales du marché. Nous avons également réalisé des extensions supplémentaires et des conceptions de position des trous, la longueur pouvant atteindre 290 mm, ce qui la rend plus pratique pour l'équilibre sur la monture équatoriale. Grâce à la fente sur la poignée, l'espacement entre l'anneau du tube peut être ajusté à volonté. De plus, il existe également une plaque à queue d'aronde Losmandy disponible à l'achat, à utiliser avec différentes montures équatoriales.\n\u003cbr\u003e\n La conception du tube principal amovible permet à un OTA de réduire le rapport focal de 4 par rapport au F6.8 natif. Il peut également être utilisé pour des observations avec binoviewer. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/e6d5f3d6-693c-47be-93d9-ad721076b802.jpg?v=1722016336\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception de tube d'objectif amovible \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/6b14e6ee-65d9-4c25-9e32-28d076f714d2.jpg?v=1722016414\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nL'Askar 103APO dispose de trois accessoires avancés en option : un aplatisseur 1x, un réducteur 0,8x et un réducteur focal 0,6x. Les trois accessoires sont dotés de filetages de filtre intégrés de 2\" pour une installation directe du filtre. De plus, ils sont équipés d'adaptateurs M54\/M48 et le réducteur 0,6x comprend une bague d'adaptation M68 supplémentaire pour des connexions pratiques.\n\u003cbr\u003e\n L'aplatisseur 1x ne modifie pas lui-même le rapport focal du télescope. Après connexion avec l'Askar 103APO, il conserve toujours un rapport focal de 6,8. L'aplatisseur corrige la courbure et le coma du champ, ce qui donne des bords de champ plus plats et des points d'étoile plus fins.\n\u003cbr\u003e\n Le réducteur 0,8x peut ramener le rapport focal de l'Askar 103APO à F5,4. Il s'agit d'un réducteur standard doté également de capacités d'aplatissement de champ. Un rapport focal plus court permet à l'OTA d'avoir un champ de vision plus large et des temps d'exposition plus rapides, ce qui le rend adapté à la capture de vastes zones de nébuleuses, d'amas d'étoiles et d'objets célestes faibles et se déplaçant rapidement.\n\u003cbr\u003e \nLe réducteur 0,6x peut ramener le rapport focal de l'Askar 103APO à F4 tout en assurant également un aplatissement du champ. Askar 103APO adopte une conception de tube amovible, où la partie arrière du tube peut être retirée lors de l'utilisation du réducteur 0,6x, permettant au télescope d'avoir la longueur nécessaire pour atteindre un rapport focal F4.\n\u003cbr\u003e\n Grâce à la conception du tube d'objectif amovible, l'Askar 103APO peut être utilisé pour des observations avec une visionneuse binoculaire.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Focuseur\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"\"\u003e\n\n\u003cdiv class=\"\"\u003e\n\n\u003cp\u003e\n En termes d'observations visuelles, l'Askar 103APO accorde une grande attention à la qualité des observations. Il peut facilement réaliser la mise au point lorsqu'il est connecté à des diagonales de 1,25\" ou 2\" ou à divers oculaires.\n\u003cbr\u003e \nEn ce qui concerne le porte-oculaire, l'Askar 103APO est équipé d'un grand porte-oculaire rigide de 3,3 pouces à crémaillère et pignon à double vitesse, qui peut être compatible avec la plupart des porte-oculaires motorisés du marché. Il existe également une échelle de haute précision sur la course de mise au point de 10 cm. L'ensemble du corps du porte-oculaire est usiné CNC avec une conception interne antireflet et une peinture mate, offrant des mesures supplémentaires pour éliminer la lumière parasite.\n\u003cbr\u003e\n L'arrière du porte-oculaire est doté d'un grand rotateur de haute précision à 360°, ainsi que d'échelles précises pour un réglage pratique et une sauvegarde des angles de rotation, permettant une rotation précise. Il est également équipé d'une vis de verrouillage du rotateur élargie qui peut facilement se fixer même sous des charges élevées.\n\u003cbr\u003e\n L'interface du télescope à l'arrière est livrée avec un adaptateur 1,25\"\/2\". \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003cli\u003e\n\n\u003ctable class=\"specifications\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eTaille d'ouverture\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 103mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eDistance focale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 700,4 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eRapport focale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e f\/6,8\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eLentille optique\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e APO triplet à espacement d'air (incluant un verre ED)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eLongueur totale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cul\u003e\n\n\t\t\t\t\t\t \u003cli\u003e600 mm (lorsque le pare-buée est contracté)\u003c\/li\u003e\n\n\u003cli\u003e 711 mm (lorsque le pare-buée est étiré)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003ePoids OTA\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 4,75 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003ePoids transversal (y compris l'anneau tubulaire et la plaque en queue d'aronde)\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 5,5 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eType de filetage arrière\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e Adaptateurs visuels 2\"\/1,25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eArticles du forfait standard\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e 1x103APO OTA\u003c\/li\u003e\n\n\u003cli\u003e 1 x paire d'anneaux de tube\u003c\/li\u003e\n\n\u003cli\u003e 1 x poignée\u003c\/li\u003e\n\n\u003cli\u003e 1 plaque à queue d'aronde Vixen de 290 mm\u003c\/li\u003e\n\n\u003cli\u003e 1 x manuel\u003c\/li\u003e\n\n\u003cli\u003e 1 x étui en tissu Oxford\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003cli\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv class=\"\"\u003e\n\n\u003cdiv class=\"\"\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e 1x103APO OTA\u003c\/li\u003e\n\n\u003cli\u003e 1 x paire d'anneaux de tube\u003c\/li\u003e\n\n\u003cli\u003e 1 x poignée\u003c\/li\u003e\n\n\u003cli\u003e 1 plaque à queue d'aronde Vixen de 290 mm\u003c\/li\u003e\n\n\u003cli\u003e 1 x manuel\u003c\/li\u003e\n\n\u003cli\u003e 1 x étui en tissu Oxford \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":46370262253853,"sku":"ASK-ASKAPO103","price":1679.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-103APO.png?v=1693160656"},{"product_id":"askar-140apo-f-7-triplet","title":"Askar 140APO f\/7 Triplet","description":"\u003c!-- more --\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eQue vous soyez astronome amateur ou astrophotographe professionnel, l'Askar 140APO vous offrira une expérience utilisateur de haute qualité et vous aidera à approfondir les mystères de l'univers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eL'Askar 140APO est un OTA avec une ouverture de 140 mm, une distance focale de 980 mm et un rapport focal natif f\/7.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eL'ouverture de 140 mm lui confère un avantage inhérent en termes de puissance de collecte de lumière, de résolution, de luminosité et de contraste, permettant au photographe de collecter plus de lumière et de présenter plus de détails et d'objets plus lumineux dans l'image. Avec plus de lumière entrant dans l'astrographe, la magnitude limite peut atteindre 12,5.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eL'Askar 140APO adopte une conception de lentille APO triple à espacement d'air, comprenant une pièce de verre ED.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eLa série Askar APO utilise des conceptions optiques spéciales et plusieurs éléments de lentille pour corriger l'aberration chromatique, offrant naturellement des détails d'objet et une précision des couleurs de meilleure qualité.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eDans la structure des éléments du réfracteur, l'augmentation du nombre d'éléments de lentille et la conception de combinaisons de lentilles peuvent améliorer efficacement la correction de l'aberration chromatique. Cependant, cela signifie également une augmentation des coûts de production et une complexité de conception.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cspan\u003eLe verre ED, également connu sous le nom de verre à faible dispersion, est un type de verre optique spécialement conçu pour réduire l'aberration chromatique.\u003c\/span\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47140030054685,"sku":"ASK-ASKAPO140","price":3499.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-140APO.jpg?v=1700148738"},{"product_id":"askar-185apo-f-7-triplet","title":"Askar 185APO f\/7 Triplet","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cspan\u003eEn tant que réfracteur à grande ouverture, Askar 185APO comble le poste vacant sur le marché, perpétue la haute qualité et la rentabilité des télescopes de la série APO et offre un nouveau choix aux amateurs d'astronomie.\u003c\/span\u003e \u003c\/p\u003e\n\n\u003cdiv id=\"ie_fimg-1699945393454\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/278475dc-d8a6-4255-a4b5-91d759900492.jpg\" id=\"1724688999697555456\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_grid-1699946676932\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946676932-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946687888\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946687888-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946687889\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946687889-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946687891\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/5888694d-50c2-4e93-b89d-90071753eb56.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946687892\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e3 photos de l'APO\u003c\/span\u003e\u003c\/p\u003e\n\n \u003cp\u003e\u003cspan\u003eConception triple APO\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946687888-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946687890\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946687890-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946687893\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/60e304ef-4bd0-460f-9381-20f03278aef4.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946687894\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003eED玻璃\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eVerre ED\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946687888-2\" class=\"e_box e_box-000 d_gridCell_2 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946687891\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946687891-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946687894\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/9a404223-4bf4-4c5d-b558-17993ce8621b.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946687895\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e\u003cspan\u003e可伸缩镜筒\u003c\/span\u003e\u003cspan\u003eTube d'objectif rétractable\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946676932-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946712640\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946712640-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946712641\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946712641-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946712644\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/2eef61e9-7cd1-4d04-94cc-cb4935c9594e.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946712645\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e\u003cspan\u003e船舵型锁紧圈\u003cbr\u003eanneau de verrouillage de type gouvernail\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946712640-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946712642\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946712642-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946712645\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/6984e562-bd07-498e-a153-5b0afb586232.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946712646\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e2\/1.25英寸目镜接口\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan\u003eAdaptateurs visuels 2\"\/1,25\"\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946712640-2\" class=\"e_box e_box-000 d_gridCell_2 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946712643\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946712643-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946712646\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/2d14970b-af11-469d-b2ee-3aafc7bfd044.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946712647\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003eM84大型内螺纹\u003cbr\u003eFiletage femelle M84\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_grid-1699946778301\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946778301-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946783847\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946783847-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946783848\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946783848-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946783851\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946783851-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946783852\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/e9c89ac9-3701-4721-94e8-0eb17ad54b03.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946783853\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e2个寻星镜基座\u003cbr\u003e2 bases de recherche\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946783847-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946783849\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946783849-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946783853\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/d726076c-1bf3-436a-9877-cc9ce7db6f52.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946783854\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e360° de lecture\u003cbr\u003e Rotateur à 360°\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946783847-2\" class=\"e_box e_box-000 d_gridCell_2 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946783850\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946783850-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946783855\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/878cd477-e38c-47ac-b711-362eeb82efbe.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946783855\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e3.5英寸大型有齿（R\u0026amp;P）调焦器\u003cbr\u003ePorte-oculaire R\u0026amp;P 3,5\"\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946778301-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946809265\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946809265-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946809266\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946809266-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946809268\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/34fbb768-4112-4695-acfd-96310f521010.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946809269\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e1:10微调精密\u003cbr\u003e1: 10 réglage fin\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946809265-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946809267\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946809267-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946809270\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/d3161b41-554d-4f8b-b6da-88d96a9e0640.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946809271\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e\u003cspan\u003e可伸缩遮光罩\u003cbr\u003ePare-soleil rétractable\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946809265-2\" class=\"e_box e_box-000 d_gridCell_2 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946809268\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid signal\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946809268-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946809271\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/6e7ba089-d170-4bca-a701-264c364122ee.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946809272\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e400 mm de diamètre\u003cbr\u003e Plaque à queue d'aronde Losmandy de 400 mm\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_grid-1699946969099\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946969099-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946974665\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946974665-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946974666\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/4e5c8950-bf1a-4cc8-9982-940f0bfae519.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946974669\" class=\"reset_style\"\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e\u003cspan\u003e多功能把手\u003cbr\u003ePoignée multifonctionnelle\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946974665-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946974667\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/9dbcb37d-ec35-4946-98f0-f3b814c6c2fc.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946974669\" class=\"reset_style\"\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e\u003cspan\u003e增高型抱箍\u003cbr\u003eAnneaux de tube surélevés\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946974665-2\" class=\"e_box e_box-000 d_gridCell_2 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946974668\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/8f411913-cc6c-470c-9be3-1afbac89aefc.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946974670\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003eMachine CNC\u003cbr\u003e Grandes vis de verrouillage CNC\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946969099-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_grid-1699946998456\" class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"ie_grid\"\u003e\n\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\n\u003cdiv id=\"content_ie-1699946998456-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946998457\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/63ddffa4-ffee-4e49-98c1-700b82ef87f2.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946998460\" class=\"reset_style\"\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e\u003cspan\u003e总重量17.2kg\u003cbr\u003e Poids brut 17,2 kg\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946998456-1\" class=\"e_box e_box-000 d_gridCell_1 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946998458\" class=\"ie_fimg\"\u003e\n\n\u003cdiv\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/52691b80-c5be-476f-9827-01cfa79697d4.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946998461\" class=\"reset_style\"\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e0.8倍减焦镜（另购）\u003cbr\u003e Réducteur 0,8x (facultatif)\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"content_ie-1699946998456-2\" class=\"e_box e_box-000 d_gridCell_2 p_gridCell\"\u003e\n\n\u003cdiv id=\"ie_fimg-1699946998459\" class=\"ie_fimg\"\u003e\u003cimg width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/35e7b567-8e8d-4d2d-ae18-0452c161bb7b.png\" height=\"100%\"\u003e\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699946998461\" class=\"reset_style\"\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003cp\u003e \u003cspan\u003e1倍平场镜（另购）\u003cbr\u003e 1x aplatisseur (facultatif)\u003c\/span\u003e \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_line-1699945393699\" class=\"ie_line\"\u003e\n\n\u003cdiv\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv id=\"ie_text-1699945393704\" class=\"reset_style\"\u003e\n\n \u003cp\u003e\u003cspan\u003eL'Askar 185APO est un OTA avec une ouverture de 185 mm, une distance focale de 1295 mm et un rapport focal natif f\/7.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cspan\u003eLa grande ouverture de 185 mm lui confère un avantage inhérent en termes de puissance de collecte de lumière, de résolution, de luminosité et de contraste, permettant au photographe de collecter plus de lumière et de présenter plus de détails et d'objets plus lumineux dans l'image. Avec plus de lumière entrant dans l'astrographe, la magnitude limite peut atteindre 13,1.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cspan\u003eL'Askar 185APO adopte une conception de lentille APO triple à espacement d'air, comprenant une pièce de verre ED.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cspan\u003eLa série Askar APO utilise des conceptions optiques spéciales et plusieurs éléments de lentille pour corriger l'aberration chromatique, offrant naturellement des détails d'objet et une précision des couleurs de meilleure qualité.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e \u003cspan\u003eDans la structure des éléments du réfracteur, l'augmentation du nombre d'éléments de lentille et la conception de combinaisons de lentilles peuvent améliorer efficacement la correction de l'aberration chromatique. Cependant, cela signifie également une augmentation des coûts de production et une complexité de conception.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003c\/p\u003e\n\n \u003cp\u003e\u003cspan\u003eLe verre ED, également connu sous le nom de verre à faible dispersion, est un type de verre optique spécialement conçu pour réduire l'aberration chromatique.\u003c\/span\u003e\u003c\/p\u003e\n\n\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47140051091741,"sku":"ASK-185APO","price":7391.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-185APO.jpg?v=1700148949"},{"product_id":"askar-71f-quadruplet-flat-field-apo-f-6-9","title":"Askar 71F Quadruplet champ plat APO f\/6.9","description":"\u003cul\u003e\n\n\u003cli\u003e\n\n Ouverture de 71 mm, réfracteur apochromatique quadruplet à rapport focal f\/6,9\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n Conception à champ plat optimisée pour l'astrophotographie à grand champ \n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\"\u003e\n\n\u003cp\u003e \nL'Askar 71F Quadruplet Flat-Field APO f\/6.9 est un télescope réfracteur apochromatique haute performance spécialement conçu pour l'astrophotographie à grand champ. Avec son ouverture de 71 mm et son rapport focal rapide de f\/6,9, ce télescope offre un excellent équilibre entre puissance de collecte de lumière et champ de vision, ce qui le rend idéal pour capturer de vastes objets du ciel profond et des champs d'étoiles. \n\u003c\/p\u003e\n\n\u003cdiv class=\"warning\"\u003e\n\n\u003cimg alt=\"Clause de non-responsabilité\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" width=\"25px\"\u003e\n\u003cp\u003e\n Optimisé pour l'astrophotographie. Des accessoires supplémentaires peuvent être nécessaires pour une utilisation visuelle. Vérifiez la compatibilité avec votre équipement d’imagerie existant.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e\n\n Conception optique \n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le 71F présente une conception sophistiquée d'objectif quadruplet, intégrant quatre éléments alignés avec précision pour offrir une correction des couleurs supérieure et un champ plat. Cette conception apochromatique élimine efficacement l'aberration chromatique et la courbure du champ, garantissant des images nettes et contrastées sur l'ensemble du champ de vision, ce qui est crucial pour l'astrophotographie. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"image-side-2\" data-mce-style=\"text-align: start;\" style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"Askar 71F Quadruplet champ plat APO f\/6.9\" src=\"https:\/\/davidastro.com\/cdn\/shop\/files\/Askar-71F-1_1028x1028.png?v=1712853195\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv data-mce-style=\"backgroundcolor: #0a0001; border-radius: 5px;\" style=\"background-color: #0a0001; border-radius: 5px;\"\u003e\n\n\u003ch3 style=\"color: white!important;\"\u003e\n\n Performances d'imagerie \n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp style=\"color: white!important;\"\u003e \nAvec son ouverture de 71 mm et sa focale de 490 mm (f\/6,9), le 71F excelle en astrophotographie grand champ. Il est particulièrement adapté à la capture de grandes nébuleuses, de vastes champs d'étoiles et de vastes groupes de galaxies. Le rapport focal rapide f\/6,9 permet des temps d'exposition plus courts, ce qui facilite la collecte de données même dans des conditions de ciel loin d'être idéales.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3\u003e Conception à champ plat\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n La conception à champ plat du 71F garantit que les étoiles restent nettes et précises du centre aux bords du cadre. Ceci est particulièrement avantageux pour les astrophotographes utilisant de grands capteurs, car cela élimine le besoin d'un aplatisseur de champ séparé.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Qualité de fabrication\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Construit avec des matériaux de haute qualité, notamment un tube en aluminium usiné avec précision et un pare-buée. La construction robuste assure la stabilité et minimise la flexion, essentielle pour l'astrophotographie à longue exposition. Le pare-buée rétractable ajoute à sa portabilité.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Focuseur\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e \nÉquipé d'un porte-oculaire à double vitesse de haute précision, permettant les réglages fins nécessaires pour obtenir une mise au point parfaite en astrophotographie. Le porte-oculaire est conçu pour gérer de lourdes charges utiles d’imagerie sans glisser, garantissant ainsi des performances constantes tout au long des longues sessions d’imagerie.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Portabilité\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Avec sa taille compacte et sa conception légère, le 71F est très portable, ce qui en fait un excellent choix pour les astrophotographes qui se rendent fréquemment sur des sites du ciel sombre. Sa portabilité ne compromet pas ses performances optiques, offrant un équilibre parfait pour les configurations d'imagerie mobiles.\n\u003c\/p\u003e\n\n\n\u003ch3\u003e\n\n Polyvalence\n\n\u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\n Bien qu'essentiellement conçu pour l'astrophotographie, l'Askar 71F peut également être utilisé pour des observations visuelles avec les accessoires appropriés. Il offre des vues époustouflantes à grand champ des champs d'étoiles, des nébuleuses et des objets plus grands du ciel profond, ce qui en fait un instrument polyvalent pour diverses activités astronomiques.\n\u003c\/p\u003e\n\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48093955359005,"sku":"ASK-ASAPO71F","price":923.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-71F-1.png?v=1712853195"},{"product_id":"askar-sqa55-55mm-f-4-8-quintuplet-apo","title":"Askar SQA55 55 mm f\/4,8 Quintuplet APO","description":"\u003cul\u003e\n\n Pré commandez maintenant.\n\n\u003c\/ul\u003e\n\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\n\u003cli class=\"active\"\u003e Description\u003c\/li\u003e\n\n\u003cli\u003e Caractéristiques\u003c\/li\u003e\n\n\u003cli\u003e Dans la boite\u003c\/li\u003e\n\n\u003cli\u003e Manuels et téléchargements \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\n\u003cli class=\"active\" style=\"text-align: justify;\"\u003e\n\n\u003cp\u003e\n Askar présente le SQA55, un astrographe Petzval en verre SD à espacement aérien auintuplet, qui peut être utilisé pour l'astrophotographie et la photographie quotidienne.\n\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception optique Petzval pointue \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e L'objectif présente une conception quintuplée à espacement d'air, intégrant une pièce de verre SD et une pièce de verre ED. Cette conception permet d'obtenir un point étoile exceptionnellement fin, avec un rayon RMS central inférieur à 2,5 micromètres et un point étoile d'angle inférieur à 4 micromètres.\u003c\/p\u003e\n\n\u003cp\u003e La conception est auto-aplatie, éliminant le besoin de calculer une mise au point arrière spécifique. Le plan focal est compris entre 50 mm et 60 mm calculé à partir de l'arrière du télescope, de sorte que les utilisateurs peuvent immédiatement commencer la prise de vue une fois l'OTA mis au point. \u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA55-Star-Size.png?v=1721246555\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\t\t\t \u003ch3\u003eConception de mise au point à double vitesse \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA55-Dual-Focuser.png?v=1721247319\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e Le mécanisme de mise au point propose des réglages fins et grossiers, qui peuvent être contrôlés indépendamment. Le réglage fin comprend un point indicateur central pour un contrôle précis, offre une course de mise au point de 1 mm et est sécurisé par une vis de verrouillage. À l'inverse, le réglage grossier est marqué d'une échelle de référence en unités impériales et métriques, permettant des ajustements simples basés sur l'échelle lors d'une photographie régulière. De plus, le volant de réglage grossier est équipé de dents de synchronisation de type MXL, compatibles avec une courroie de distribution pour la fixation d'un porte-oculaire électronique.\u003c\/p\u003e\n\n\t\t\t\t\t \u003cp\u003ePour l'astrophotographie, les utilisateurs peuvent simplement faire pivoter le réglage grossier jusqu'à la marque de l'infini pour obtenir la mise au point, avec une marge de manœuvre supplémentaire fournie par la conception auto-aplatie, qui ne nécessite aucun calcul de mise au point arrière spécifique dans une distance de connexion de 50 mm à 60 mm. Cette conception simplifie le processus d'alignement du télescope avec les accessoires essentiels et comprend une vis de verrouillage pour des réglages sécurisés.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Pointe étoile super fine \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Conception de lentilles à espacement d'air quintuplet, comprenant 1 morceau de verre SD et 1 morceau de verre ED. Le point étoile central a un rayon RMS inférieur à 2,5 microns et le point étoile au coin est inférieur à 4 microns, montrant un point étoile super fin. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.30.54_PM.png?v=1721766665\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Structure des lentilles Petzval \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.32.51_PM.png?v=1721766783\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Conception auto-aplatie, pas besoin de calculer un backfocus spécifique entre une distance de connexion de 50 mm et 60 mm, les astrophotographes peuvent l'utiliser directement pour la prise de vue une fois l'OTA mis au point.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\t\t\t \u003ch3\u003ePare-soleil spécial réversible. \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le pare-soleil est fixé par une fente, lorsque le pare-soleil n'est pas utilisé, il peut être rangé sur le barillet d'objectif à l'envers pour réduire le volume global, et lors de son utilisation, il suffit de le coller sur l'objectif. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_SQA55_Reversible_Design_1.gif?v=1721766926\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Objectif à ouverture variable \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.49.42_PM.png?v=1721767830\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n La plage d'ouverture de l'objectif va de F22 à F\/4,8, avec une bague de réglage graduée et une échelle marquée sur le tube de l'objectif pour éviter tout contact accidentel et enregistrer les paramètres de réglage.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Base à dégagement rapide pour appareil photo \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Boutons de dégagement rapide de l'appareil photo sur la poignée supérieure et le support inférieur, qui peuvent être utilisés pour convertir l'OTA en mode objectif de l'appareil photo manuellement et rapidement sans outils supplémentaires. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/sqa55_19920a06-f256-4cb9-ad30-71689baa6ae5.gif?v=1721767918\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/sqa55.gif?v=1721767916\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Poignée, support et plaque en queue d'aronde \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.52.37_PM.png?v=1721768005\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nLa poignée dispose d'une fente de base de recherche, qui peut connecter différents accessoires astronomiques. La poignée est de conception à dégagement rapide et peut être retirée sans outils supplémentaires. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.52.43_PM.png?v=1721768005\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le support inférieur comporte des trous de vis 1\/4 et 3\/8 pour fixer un trépied. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.52.57_PM.png?v=1721768005\" alt=\"\"\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n La plaque à queue d'aronde est une plaque à queue d'aronde standard de style Vixen de 200 mm. Le bas de la plaque en queue d'aronde est conçu avec des vis à main et un bouton à dégagement rapide, qui peuvent être démontés et assemblés sans outils supplémentaires.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Fil de filtre M67 \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n L'avant de l'objectif est conçu avec un filetage de filtre M67 qui peut être connecté aux filtres de l'appareil photo, pratique pour la photographie quotidienne. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/output-onlinegiftools.gif?v=1721768240\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Applications de scènes photographiques diversifiées \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nConception optique et mécanique optimisée pour la photographie astronomique et la photographie quotidienne. Il peut être utilisé pour se connecter à des caméras d'astronomie pour prendre des photos d'étoiles, ou pour se connecter à des appareils photo reflex numériques\/sans miroir pour être utilisé comme objectifs d'appareil photo.\n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Conception à double rotateur \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le tube d'objectif et le rotateur à 360 degrés sont tous deux dotés de vis de verrouillage indépendantes. Pour la prise de vue quotidienne, tout le corps peut pivoter. Pour l'astrophotographie, le rotateur de haute précision peut être tourné indépendamment, tandis que le rotateur est gravé avec une échelle, ce qui est pratique pour ajuster et enregistrer l'angle. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.57.49_PM.png?v=1721768292\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Chemin optique \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n Le SQA55 est une conception de lentille à espacement d'air quintuplet, comprenant 1 morceau de verre SD et 1 morceau de verre ED. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-23_at_4.57.59_PM.png?v=1721768292\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Graphique MTF \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nLa fonction de transfert de modulation (MTF) est une description quantitative de la clarté de l'image (y compris la résolution et le contraste) d'une lentille optique. L'axe vertical est la valeur MTF et l'axe horizontal est la distance entre le centre du cadre et le bord. Dans les deux ensembles de courbes correspondant aux basses séries de courbes correspondant aux basses et hautes fréquences, même en bordure du plein cadre. Les lignes sagittales et la distance des lignes sagittales de l'objectif SQA55 restent très petites, et à la basse fréquence de 10LP\/mm, elles sont globalement supérieures à 0,8, montrant la haute résolution et la netteté du SQA55. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.15.22_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Éclairage relatif \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nL'éclairage relatif (RI) représente l'effet combiné de la perte de lumière et de l'atténuation aux coins de la lentille, et la courbe RI illustre le changement d'éclairement (%) sur toute la plage d'imagerie du capteur. Les variations d'éclairage peuvent nuire à l'image. L'axe vertical représente différents pourcentages d'exemples d'intensités d'éclairage, et l'axe horizontal représente la distance entre le centre du cadre et le bord. Le SQA55 garantit un éclairage élevé d'environ 90 % même au bord du plein format, minimisant ainsi le vignettage. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.15.14_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Diagramme de points \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e\n La qualité d'imagerie du système optique peut être évaluée en analysant la répartition des points sur le diagramme de points. Le SQA55 a un point étoile central avec un rayon RMS inférieur à 2,5 microns, et le point étoile au coin est inférieur à 4 microns, montrant un point étoile fin. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.15.07_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Tableau des objectifs Zygo \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cp\u003e \nL'interféromètre ZYGO est reconnu internationalement comme un instrument faisant autorité pour tester la qualité des lentilles optiques, et les résultats du test SQA55 montrent une grande qualité d'étoile. \n\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.14.59_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv\u003e\n\n\u003ch3\u003e Autres images que vous voudrez peut-être regarder \u003c\/h3\u003e\n\n\u003chr\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.13.51_AM.png?v=1722006943\"\u003e\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.13.59_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.14.38_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\u003cbr\u003e\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_11.14.45_AM.png?v=1722006942\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003cli\u003e\n\n\u003ctable class=\"specifications\"\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eTaille d'ouverture\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 55mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eDistance focale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 264mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eRapport focale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e f\/4.8\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eLentille optique\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e Quintuplet Petzval APO (Un morceau de verre SD, un morceau de verre ED)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eSpécifications des formats\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 44mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eLames d'ouverture\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 14 pièces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eOuverture graduée\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e f\/4,8 - f\/22\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eDistance de mise au point la plus proche\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 5m\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eMode de mise au point\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e Mise au point manuelle\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eDiamètre du filtre\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e M67\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eLongueur totale\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 316 mm (avec pare-buée) : 244 mm (sans pare-buée)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003ePoids OTA\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 1,84 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003ePoids total (y compris la poignée et la plaque en queue d'aronde)\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e 2,18 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e \n\u003ctr\u003e\n\n\u003ctd\u003e\u003cb\u003eDistance de connexion arrière\u003c\/b\u003e\u003c\/td\u003e\n\n\u003ctd\u003e Prise en charge d'une plage de 50 à 60 mm (la longueur de connexion recommandée est de 55 mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e \u003cb\u003eArticles du forfait standard\u003c\/b\u003e\n\u003c\/td\u003e\n\n\u003ctd\u003e un SQA55 OTA, un étui de transport étanche de qualité militaire \u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003cli\u003e\n\n\u003cdiv\u003e\n\n\u003cdiv class=\"two-columns-section\"\u003e\n\n\u003cdiv class=\"text-side-2\"\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n 1 x SQA55OTA\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n Étui de transport étanche de qualité militaire \n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"text-align: start;\" class=\"image-side-2\" data-mce-style=\"text-align: start;\"\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Screenshot_2024-07-26_at_10.52.37_AM.png?v=1722005570\"\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003cli\u003e\n\n\u003ch3\u003e Diagramme des tailles du produit \u003c\/h3\u003e\n\n\u003cimg alt=\"\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/a5fc51b2-0901-48cd-bac7-3fb9f223545a.jpg\"\u003e\n\u003chr\u003e\n\n\u003ch3\u003e Manuels\u003c\/h3\u003e\n\n \u003ca href=\"https:\/\/omo-oss-file.thefastfile.com\/portal-saas\/new2022072923460240318\/cms\/file\/sqa55%E8%AF%B4%E6%98%8E%E4%B9%A6%E4%B8%AD%E8%8B%B1%E6%96%87.pdf\" target=\"_blank\"\u003eManuel\u003c\/a\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48840234533149,"sku":"ASK-ASKSQA55","price":1113.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA55-1.jpg?v=1721238713"},{"product_id":"askar-sqa85-85mm-f-4-8-quintuplet-apo","title":"Askar SQA85 85mm f\/4.8 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e85mm Aperture\u003c\/li\u003e\n\u003cli\u003e408mm Focal Length (f\/4.8)\u003c\/li\u003e\n\u003cli\u003eQuintuplet Petzval APO Optical Design\u003c\/li\u003e\n\u003cli\u003eSupports Full-Frame (44mm) Image Circle\u003c\/li\u003e\n\u003cli\u003e3.64kg OTA Weight\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\u003eAskar SQA85 85mm f\/4.8 Quintuplet APO\u003c\/h2\u003e\n\u003cp\u003eThe Askar SQA85 is a dedicated astrograph designed around a 5-element Petzval optical system, delivering a natively flat field at a fast f\/4.8 focal ratio from its 85mm objective. This 408mm focal length instrument incorporates two SD glass elements for superior color correction and illuminates a full-frame image circle without requiring a separate flattener. Weighing just 3.64kg and measuring a compact 403mm with its dew shield retracted, the SQA85 provides a powerful, portable imaging platform for capturing expansive 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\u003eNative f\/4.8 Petzval Optics: A Flat Field for Full-Frame Sensors\u003c\/h3\u003e\n\u003cp\u003eThe core of the SQA85 is its quintuplet Petzval APO objective, an integrated design that eliminates the need for a separate field flattener. This f\/4.8 system provides sharp, pinpoint stars across a full-frame sensor right out of the box. The 408mm focal length is ideal for framing large deep-sky objects like the Andromeda Galaxy (M31) or the entire Veil Nebula complex.\u003c\/p\u003e\n\u003cp\u003eTo ensure high-contrast images free of false color, the optical train includes two pieces of SD (Super ED) glass. This corrects for chromatic aberration, rendering stars as neutral white points against a dark sky background, which is critical for both broadband and narrowband 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\u003eImaging-Ready Mechanics: 3.64kg OTA with Versatile M48\/M54\/M68 Adapters\u003c\/h3\u003e\n\u003cp\u003eWith a bare optical tube assembly weight of 3.64kg, the SQA85 is light enough for a wide range of portable tracking mounts, minimizing payload demands while maximizing stability. The physical design is compact, with a total length of just 403mm when the dew shield is contracted, making it easy to transport and store.\u003c\/p\u003e\n\u003cp\u003eFor secure imaging train connections, the SQA85 includes M48, M54, and M68 adapters, allowing you to directly thread your filter wheel, off-axis guider, or camera. The system supports a back focus distance from 40mm to 70mm, with the standard 55mm being the recommended distance for use with most DSLR and dedicated astronomy cameras.\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\u003eSQA85 Petzval vs. Triplet + Flattener: The Simplicity of an Integrated System\u003c\/h3\u003e\n\u003cp\u003eWhile a traditional triplet refractor combined with a separate field flattener offers modularity, it also introduces complexity and potential sources of error. The primary advantage of the SQA85's integrated quintuplet Petzval design is the elimination of spacing guesswork and potential optical tilt between the objective and the corrector.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriplet + Flattener Trade-off:\u003c\/strong\u003e The main advantage of a modular system is the ability to use the telescope visually without the flattener. However, achieving a perfectly flat field for imaging requires precise, calculated spacing that can be difficult to dial in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar SQA85 Advantage:\u003c\/strong\u003e As a single, factory-optimized system, the SQA85 guarantees flat-field performance. There is only one connection point to worry about—setting your camera sensor at the recommended 55mm back focus. This reduces potential flexure points and simplifies your setup, letting you spend more time imaging and less time troubleshooting star shapes.\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 Quintuplet Petzval design of the Askar SQA85 mean for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eQuintuplet Petzval\u003c\/strong\u003e design means the Askar SQA85 has a built-in field flattener. You do not need to purchase a separate corrector to get sharp, pinpoint stars across a full-frame sensor. It is an integrated imaging system designed to work perfectly right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the Askar SQA85?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SQA85 has an optical tube weight of \u003cstrong\u003e3.64kg\u003c\/strong\u003e and a gross weight of \u003cstrong\u003e4.62kg\u003c\/strong\u003e (including tube rings and a dovetail plate). A mid-sized equatorial mount with a payload capacity of 25-30 lbs (11-13 kg) or more, such as a Sky-Watcher HEQ5 or iOptron CEM26, would be an excellent match for stable, long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar SQA85's 408mm focal length perform on large targets like the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e408mm focal length\u003c\/strong\u003e is perfectly suited for this scenario. On a full-frame sensor, the Askar SQA85 will frame the entire Andromeda Galaxy (M31), including its satellite galaxies M32 and M110, with ample room to spare. This makes it an ideal instrument for capturing the full extent of large nebulae and galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my camera to the Askar SQA85?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SQA85 includes \u003cstrong\u003eM48, M54, and M68\u003c\/strong\u003e threaded adapters at the rear. The most common connection is the M48x0.75 thread. You simply add the necessary extension tubes to place your camera's sensor at the recommended \u003cstrong\u003e55mm back focus distance\u003c\/strong\u003e from the adapter's flange.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar SQA85's f\/4.8 focal ratio fast enough for narrowband imaging of the Cygnus Loop?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003ef\/4.8\u003c\/strong\u003e focal ratio is considered very fast for astrophotography. This speed allows you to gather significant signal in a shorter amount of time, which is a major advantage for narrowband imaging of faint targets like the Cygnus Loop. You can capture deep data with shorter sub-exposures compared to a slower f\/6 or f\/7 refractor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the two SD glass elements in the Askar SQA85 objective?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two \u003cstrong\u003eSD (Super ED) glass elements\u003c\/strong\u003e provide excellent chromatic aberration correction. This means that different colors of light are brought to the same focal point, resulting in sharp, high-contrast images without distracting purple or blue halos around bright stars.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e408mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuintuplet Petzval APO (with 2 SD glass elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat \/ Image Circle\u003c\/td\u003e\n\u003ctd\u003eFull-frame (44mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e3.64kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e4.62kg (including tube ring and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e403mm (dew shield contracted) | 439mm (dew shield stretched)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-End Thread Adapters\u003c\/td\u003e\n\u003ctd\u003eM48, M54, M68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e40mm - 70mm (55mm recommended)\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\"\u003eAskar SQA85 OTA\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\"\u003eOxford Cloth 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\/Askar_SQA85_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software \u0026amp; Drivers\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":49200813867293,"sku":"ASK-SQA85","price":3353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA85-1.jpg?v=1727373818"},{"product_id":"askar-sqa106-106mm-f-4-8-quintuplet-apo","title":"Askar SQA106 106mm f\/4.8 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e106mm Aperture\u003c\/li\u003e\n\u003cli\u003ef\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e509mm Focal Length\u003c\/li\u003e\n\u003cli\u003eQuintuplet Petzval APO Optical Design\u003c\/li\u003e\n\u003cli\u003e55mm Image Circle for Medium Format\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\u003eAskar SQA106 106mm f\/4.8 Quintuplet APO\u003c\/h2\u003e\n\u003cp\u003eThe Askar SQA106 combines a 106mm aperture with a fast f\/4.8 focal ratio, delivering a 509mm focal length ideal for wide-field astrophotography. Its integrated five-element Petzval design, which includes two SD glass elements, produces a corrected 55mm image circle for medium format sensors without requiring a separate flattener. With a gross weight of 8.12kg including its tube rings and dovetail, this Quintuplet APO provides a complete, flat-field imaging solution right out of the box.\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 106mm f\/4.8 Quintuplet APO with 2 SD Elements\u003c\/h3\u003e\n\u003cp\u003eThe core of the SQA106 is its self-flattening Quintuplet Petzval optical system. This five-element design incorporates two pieces of SD (Super ED) glass to achieve apochromatic color correction, suppressing chromatic aberration for high-contrast images with sharp, color-pure stars. The f\/4.8 focal ratio gathers significant light, reducing required exposure times on faint deep-sky objects like the North American Nebula (NGC 7000) or the Heart Nebula (IC 1805).\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\u003e55mm Illumination for Medium Format Sensors\u003c\/h3\u003e\n\u003cp\u003eEngineered for large-format imaging, the Askar SQA106 produces a corrected 55mm image circle. This not only covers standard 44mm full-frame sensors with excellent illumination to the corners but is also large enough for many medium format CMOS and CCD cameras. This capability ensures your investment is future-proof as sensor sizes continue to grow, eliminating concerns about vignetting and field curvature on today's largest amateur 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\u003e8.12kg Gross Weight and Imaging-Ready Adapters\u003c\/h3\u003e\n\u003cp\u003eThe SQA106 is built for serious imaging. The optical tube alone weighs 5.82kg, and the complete assembly with tube rings and dovetail plate comes to 8.12kg, requiring a mid-range equatorial mount for stable tracking. The rear of the focuser includes M68, M54, and M48 adapters, providing direct, threaded connections for a wide range of cameras and filter wheels. A flexible back focus range from 48mm to 78mm, with a recommended distance of 55mm, accommodates various imaging train configurations.\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\u003eSQA106 Petzval Design vs. Triplet + Flattener Systems\u003c\/h3\u003e\n\u003cp\u003eUnlike conventional triplet refractors that require a separate, carefully spaced field flattener, the SQA106's Petzval design has the correction elements built directly into the main optical tube. This offers a significant advantage in simplicity and reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Flat Field:\u003c\/strong\u003e There is no guesswork involved in achieving the correct flattener-to-sensor spacing. The SQA106 is designed to be perfectly flat at its native focal plane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Connections:\u003c\/strong\u003e An integrated design means fewer potential points of flexure or tilt in your imaging train compared to adding an external corrector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-off:\u003c\/strong\u003e The primary trade-off is a lack of modularity. While a triplet can be used with different reducers or flatteners, the SQA106 is optimized for one specific focal length and image circle. For imagers seeking a dedicated, hassle-free wide-field instrument, the SQA106's integrated approach is superior.\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 type of equatorial mount is required for the Askar SQA106?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a gross weight of \u003cstrong\u003e8.12kg\u003c\/strong\u003e for the OTA, rings, and dovetail, plus the weight of your camera and guide scope, the total imaging payload will likely be around 10-12kg. A mount with a payload capacity of at least 18kg (40 lbs), such as a Celestron CGEM II or Sky-Watcher EQ6-R Pro, is recommended for stable, long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Askar SQA106 need a separate field flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The SQA106 features a \u003cstrong\u003eQuintuplet Petzval APO\u003c\/strong\u003e optical design, which has the field-flattening elements built directly into the telescope. This provides a corrected, flat field across its 55mm image circle without any additional accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the correct back focus for my camera with the SQA106?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar SQA106 supports a back focus range from 48mm to 78mm from the base of the M48 adapter threads. The \u003cstrong\u003erecommended back focus is 55mm\u003c\/strong\u003e, which is standard for most DSLRs with a T-ring and many dedicated astronomy cameras. Simply add spacers as needed to place your camera's sensor at this distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the SQA106's 55mm image circle for a full-frame (44mm) camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing a sensor smaller than the maximum corrected image circle provides significant benefits. With a \u003cstrong\u003e44mm full-frame sensor\u003c\/strong\u003e inside the SQA106's \u003cstrong\u003e55mm image circle\u003c\/strong\u003e, you are imaging with the best-corrected central part of the field. This results in tighter star shapes, more even illumination, and minimal optical aberrations at the extreme corners of your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar SQA106 perform on a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SQA106 is exceptionally well-suited for targets like the Andromeda Galaxy (M31). At a \u003cstrong\u003e509mm focal length\u003c\/strong\u003e, it can frame the entire galaxy, including its faint outer arms, on a full-frame sensor. The fast \u003cstrong\u003ef\/4.8 focal ratio\u003c\/strong\u003e will help capture the faint dust lanes and star-forming regions with shorter total integration time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"Quintuplet APO with two SD glass elements\" mean for my images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis describes the optical design. \u003cstrong\u003e\"Quintuplet\"\u003c\/strong\u003e means there are five lenses. \u003cstrong\u003e\"APO\" (Apochromatic)\u003c\/strong\u003e means it's highly corrected for color fringing. The \u003cstrong\u003e\"two SD glass elements\"\u003c\/strong\u003e are the specific type of low-dispersion glass used to achieve that color correction. The result is high-contrast images with sharp, natural-colored stars without distracting purple or blue halos.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e106mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e509mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eQuintuplet Petzval APO (2x SD Glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e55mm (Medium Format), covers 44mm (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Range\u003c\/td\u003e\n\u003ctd\u003e48mm - 78mm (55mm Recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Adapters\u003c\/td\u003e\n\u003ctd\u003eM48, M54, M68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e5.82 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (with rings)\u003c\/td\u003e\n\u003ctd\u003e8.12 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e516mm (Retracted) \/ 586mm (Extended)\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\"\u003eAskar SQA106 OTA\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\"\u003eOxford Cloth 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\/Askar_SQA106_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":49344703267101,"sku":"ASK-SQA106","price":4753.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/dfd18ed2-7af7-44b1-a8f8-aaaaa1b22ac6.png?v=1730997970"},{"product_id":"askar-160apo-f-7-triplet","title":"Askar 160APO f\/7 Triplet","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e160mm Aperture Triplet Air-Spaced APO Objective\u003c\/li\u003e\n\u003cli\u003e1120mm Focal Length at f\/7\u003c\/li\u003e\n\u003cli\u003eIncludes One ED Glass Element for Color Correction\u003c\/li\u003e\n\u003cli\u003eRetractable Dew Shield and Rear Tube for Compact Transport\u003c\/li\u003e\n\u003cli\u003e11.4kg OTA Weight (13.6kg with Rings and Plate)\u003c\/li\u003e\n\u003cli\u003eSupports Full-Frame Imaging with a 44mm Image Circle\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\u003eAskar 160APO f\/7 Triplet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Askar 160APO delivers the immense light-gathering power of a 160mm aperture combined with the color fidelity of an f\/7 air-spaced triplet objective. Its 1120mm focal length provides the image scale necessary to resolve fine detail on planets and in small galaxies, while the optical design, which includes one ED glass element, ensures high-contrast, apochromatic views. Weighing 13.6kg fully equipped, this telescope is a serious imaging instrument built for observatory-class mounts.\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 160mm f\/7 Triplet APO Objective\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the 160APO is its 160mm air-spaced triplet objective. This design uses an ED (Extra-low Dispersion) glass element to minimize chromatic aberration, producing sharp stars with no distracting color fringing. The f\/7 focal ratio strikes a balance between providing a large image scale at 1120mm and maintaining a manageable physical length for mounting and transport.\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 Retractable Body: 883mm Transport Length and 115mm of Adjustment\u003c\/h3\u003e\n\u003cp\u003eFor an instrument of this aperture, portability is a key engineering challenge. Askar addresses this with a dual-retractable design. The dew shield retracts to shorten the overall length to just 883mm for storage and transport, and extends to 996mm for observing. More critically, the rear lens tube itself offers 115mm of retraction, a crucial feature for balancing the 11.4kg OTA when switching between lightweight eyepieces and heavy, full-frame imaging trains.\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\u003eImaging Platform: A 44mm Image Circle for Full-Frame Sensors\u003c\/h3\u003e\n\u003cp\u003eThe Askar 160APO is engineered as a capable astrograph. It is designed to produce a 44mm image circle, which is large enough to fully illuminate the sensors of full-frame DSLR, mirrorless, and dedicated astronomy cameras without significant vignetting. This makes it an ideal platform for capturing wide, deep vistas of large nebulae and star fields, taking full advantage of the telescope's 160mm aperture.\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\u003eAskar 160APO vs. Other Large Refractors: Weight and Portability\u003c\/h3\u003e\n\u003cp\u003eWhen considering a refractor of this size, the primary trade-off is aperture versus weight. At a gross weight of 13.6kg with its included 400mm Losmandy plate and rings, the Askar 160APO requires a substantial German equatorial mount. However, its retractable design gives it a significant advantage in portability and setup efficiency compared to fixed-tube refractors of similar focal length, making it a more practical option for imagers who travel to dark sky sites.\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 class of mount is required for the Askar 160APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a fully dressed weight of \u003cstrong\u003e13.6kg (30 lbs)\u003c\/strong\u003e before adding a camera, guide scope, or other accessories, the Askar 160APO requires a heavy-duty equatorial mount. For stable imaging, you should consider a mount with a payload capacity of at least 50-60 lbs, such as a Sky-Watcher EQ8-R, iOptron CEM70, or larger model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Askar 160APO fully illuminate a full-frame camera sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The optical system is designed to produce a \u003cstrong\u003e44mm corrected image circle\u003c\/strong\u003e. This is large enough to cover a standard 36mm x 24mm full-frame sensor, making it an excellent choice for wide-field astrophotography with cameras like the ZWO ASI6200MM\/MC Pro or a DSLR.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar 160APO perform on faint details in the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e160mm aperture\u003c\/strong\u003e provides excellent light-gathering capability, allowing you to resolve the faint outer loops of gas and dust in M42. The \u003cstrong\u003e1120mm focal length\u003c\/strong\u003e provides the necessary image scale to clearly separate the four main stars of the Trapezium cluster at the nebula's core, even under moderately good seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 115mm retractable rear tube on the 160APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e115mm retractable section\u003c\/strong\u003e at the rear of the telescope serves two main purposes. First, it allows for more compact storage. Second, and more importantly, it helps you achieve proper balance on the mount by shifting the center of gravity. This is especially useful when switching between a lightweight visual setup and a heavy imaging train with a filter wheel and off-axis guider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 1120mm focal length of the 160APO suitable for imaging smaller galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e1120mm focal length\u003c\/strong\u003e is well-suited for medium-to-small deep-sky objects. It provides enough magnification to frame M51 and its companion galaxy nicely, allowing you to resolve spiral arm structure and dust lanes, especially when paired with a camera with smaller pixels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the single ED element in the Askar 160APO's triplet lens affect performance?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe single ED glass element in the \u003cstrong\u003eair-spaced triplet objective\u003c\/strong\u003e is crucial for its apochromatic (APO) designation. It works to bring different wavelengths of light to a very close focal point, significantly reducing chromatic aberration (false color). This results in higher contrast and sharper stars compared to a doublet or achromat of the same 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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e160mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eTriplet air-spaced APO (with one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e11.4kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e13.6kg (including tube rings and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e883mm (dew shield contracted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Extended)\u003c\/td\u003e\n\u003ctd\u003e996mm (dew shield stretched)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Tube Retraction\u003c\/td\u003e\n\u003ctd\u003e115mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Adapters\u003c\/td\u003e\n\u003ctd\u003e2\" and 1.25\" visual adapters\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\"\u003e160APO OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eHandle\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\"\u003eAskar 400mm Losmandy Dovetail Plate\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\"\u003eAluminum Carrying Case\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\"\u003eManual\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\/Askar_160APO_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":49580263178525,"sku":"ASK-ASKAPO160","price":5383.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-160APO.jpg?v=1737053717"},{"product_id":"askar-sqa70-70mm-f-4-8-quintuplet-apo","title":"Askar SQA70 70mm f\/4.8 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e70mm Aperture\u003c\/li\u003e\n\u003cli\u003e336mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eQuintuplet (5-Element) APO Petzval Optical Design\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eContains Two ED Glass Elements\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\u003eAskar SQA70 70mm f\/4.8 Quintuplet APO\u003c\/h2\u003e\n\u003cp\u003eThe Askar SQA70 combines a 70mm aperture with a fast f\/4.8 focal ratio and 336mm focal length in a self-flattening quintuplet Petzval optical design. Engineered for astrophotography, it uses two ED glass elements to deliver sharp, color-correct stars across a 44mm image circle, fully illuminating full-frame sensors without the need for an additional flattener.\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\u003eFull-Frame f\/4.8 Imaging with a 5-Element Petzval Design\u003c\/h3\u003e\n\u003cp\u003eThe SQA70 is built around a five-element, air-spaced Petzval design that acts as its own field flattener, correcting for field curvature internally. This design produces a flat, coma-free 44mm image circle capable of covering full-frame CMOS and CCD sensors. The inclusion of two ED (Extra-low Dispersion) glass elements ensures chromatic aberration is suppressed, resulting in high-contrast images with sharp, well-defined stars from edge to edge.\u003c\/p\u003e\n\u003cp\u003eThe fast f\/4.8 focal ratio allows you to gather significant signal in shorter exposure times, reducing tracking demands and maximizing data collection on clear nights. This speed makes the SQA70 highly effective for capturing faint, extended nebulosity and dense star fields.\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 336mm Focal Length for Wide-Field Astrophotography\u003c\/h3\u003e\n\u003cp\u003eWith a focal length of 336mm, the Askar SQA70 is purpose-built for capturing grand celestial landscapes. This wide field of view is perfectly suited for framing large targets like the Andromeda Galaxy (M31), the North America Nebula (NGC 7000), or the entire Rho Ophiuchi cloud complex in a single shot.\u003c\/p\u003e\n\u003cp\u003eWhile not intended for high-magnification planetary imaging, this focal length is ideal for creating expansive mosaics of the Milky Way or capturing comets with extensive tails. Its compact nature also makes it an excellent choice for portable \"grab-and-go\" imaging setups and as a high-end telephoto lens for terrestrial photography.\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 \"Quintuplet Petzval\" design of the Askar SQA70 mean for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe quintuplet (5-element) Petzval design is a self-flattening optical system. This means the \u003cstrong\u003eAskar SQA70\u003c\/strong\u003e corrects for field curvature internally, delivering sharp stars across its entire 44mm image circle without requiring a separate field flattener accessory. You can attach your camera directly and achieve a flat field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Askar SQA70 be used with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Askar SQA70 produces a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e, which is large enough to fully illuminate the sensors of full-frame cameras (e.g., Sony a7 series, Canon R series, ZWO ASI6200MM\/MC) without vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of deep-sky objects are a good match for the Askar SQA70's 336mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 336mm focal length is ideal for large deep-sky objects and regions of the Milky Way. Excellent targets for the Askar SQA70 include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eThe Andromeda Galaxy (M31)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe North America Nebula (NGC 7000)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Rho Ophiuchi Cloud Complex\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Orion Nebula (M42) and its surrounding molecular cloud\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the f\/4.8 focal ratio of the Askar SQA70 benefit astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/4.8\u003c\/strong\u003e focal ratio allows the telescope to collect light very quickly. This means you can use shorter individual exposure times to capture faint details in nebulae and galaxies, which reduces the strain on your mount's tracking accuracy and allows you to gather more data in a single imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar SQA70 suitable for portable, wide-field astrophotography setups?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. With its 70mm aperture and 336mm focal length, the Askar SQA70 is compact and lightweight, making it an excellent choice for portable setups on trackers like the Sky-Watcher Star Adventurer or iOptron SkyGuider Pro, as well as on medium-payload equatorial mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the two ED glass elements in the Askar SQA70?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe two \u003cstrong\u003eED (Extra-low Dispersion) glass elements\u003c\/strong\u003e are used to minimize chromatic aberration, also known as color fringing. This ensures that stars are sharp, point-like, and free of distracting purple or blue halos, resulting in higher-contrast and more natural-looking images.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e336mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eQuintuplet Air-Spaced Petzval APO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Glass\u003c\/td\u003e\n\u003ctd\u003e2x ED Elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm (Full-Frame)\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\"\u003eAskar SQA70 Optical Tube Assembly\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\/Askar_SQA70_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":49772499599645,"sku":"ASK-SQA70","price":2233.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA70-1.jpg?v=1741724065"},{"product_id":"askar-fra400c-72mm-f-5-6-quintuplet-apo","title":"Askar FRA400C 72mm f\/5.6 Quintuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e72mm Aperture Quintuplet APO Optics\u003c\/li\u003e\n\u003cli\u003e400mm Focal Length at f\/5.6\u003c\/li\u003e\n\u003cli\u003eCovers a 44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eIntegrated 17-Blade Aperture (f\/5.6-f\/22)\u003c\/li\u003e\n\u003cli\u003e2.68kg Optical Tube Weight\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\u003eAskar FRA400C 72mm f\/5.6 Quintuplet APO\u003c\/h2\u003e\n\u003cp\u003eThe Askar FRA400C is a 72mm f\/5.6 Quintuplet APO astrograph engineered to deliver a flat, corrected 44mm image circle for full-frame sensors. Its 400mm focal length provides an ideal wide-field perspective, while the Petzval-like optical train, featuring two ED glass elements, requires no additional flattener for sharp stars 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\u003eFlat-Field f\/5.6 Optics: A 44mm Full-Frame Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe core of the FRA400C is its self-flattening Quintuplet air-spaced APO design. This Petzval-like optical system uses two extra-low dispersion (ED) glass elements to correct for chromatic aberration, producing high-contrast images with no false color. Critically, it delivers a 44mm image circle, fully illuminating full-frame camera sensors without the need for a separate field flattener.\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\u003eHybrid Astrograph \u0026amp; Telephoto: 17-Blade Aperture from f\/5.6 to f\/22\u003c\/h3\u003e\n\u003cp\u003eUnlike most astrographs, the FRA400C includes a manually adjustable aperture, stopping down from f\/5.6 to f\/22. With 17 aperture blades, it produces exceptionally smooth, circular out-of-focus highlights (bokeh) when used as a daytime telephoto lens. This feature, combined with a 5m closest focus distance, makes it a capable dual-purpose instrument for both celestial and terrestrial photography.\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\u003eCompact \u0026amp; Adaptable: 2.68kg OTA with M48 Connectivity\u003c\/h3\u003e\n\u003cp\u003eWeighing just 2.68kg for the optical tube alone, and measuring 370mm with the dew shield retracted, the FRA400C is built for portability. At a total weight of 3.18kg with its handle and dovetail, it's an ideal match for lightweight equatorial mounts. The rear of the focuser provides M72, M54, and a standard M48 adapter, ensuring direct connection to most astronomy cameras and DSLRs with a standard 55mm back 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\u003eAskar FRA400C vs. FRA400: What Does the \"C\" Mean?\u003c\/h3\u003e\n\u003cp\u003eThe FRA400C is positioned as a more accessible version of the original Askar FRA400 astrograph. While both share the same core 72mm f\/5.6 quintuplet optical design and 400mm focal length, the 'C' model achieves a lower price point through a more streamlined mechanical design. The FRA400C is lighter (2.68kg vs. 2.9kg OTA) and more compact, making it an excellent choice for imagers prioritizing portability and value without compromising on the 44mm flat-field optical performance.\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 mount do I need for the Askar FRA400C?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a total weight of \u003cstrong\u003e3.18kg (7 lbs)\u003c\/strong\u003e including the handle and dovetail plate, the Askar FRA400C is very lightweight. It works well on portable tracking mounts with a payload capacity of 15-20 lbs or more, such as the Sky-Watcher Star Adventurer GTi or a Celestron Advanced VX.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Askar FRA400C require a separate field flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Askar FRA400C features a \u003cstrong\u003eQuintuplet Petzval-like optical design\u003c\/strong\u003e that is inherently self-flattening. It is designed to produce a flat field across its 44mm image circle without any additional corrective optics, simplifying your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my full-frame DSLR to the Askar FRA400C?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FRA400C includes an \u003cstrong\u003eM48 adapter\u003c\/strong\u003e. To connect a DSLR, you will need a standard M48 T-ring for your camera brand (e.g., Canon EOS or Nikon). The telescope is designed for a \u003cstrong\u003e55mm back focus distance\u003c\/strong\u003e, which is the standard for DSLRs with their corresponding T-ring, allowing for a direct and simple connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the field of view of the FRA400C on a full-frame camera when imaging the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its \u003cstrong\u003e400mm focal length\u003c\/strong\u003e, the Askar FRA400C on a full-frame sensor (36x24mm) provides a field of view of approximately 5.1° x 3.4°. This is wide enough to comfortably frame the entire North American Nebula (NGC 7000) and the neighboring Pelican Nebula (IC 5070) in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar FRA400C for daytime wildlife photography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The FRA400C is an excellent dual-purpose lens. Its manual aperture can be stopped down from \u003cstrong\u003ef\/5.6 to f\/22\u003c\/strong\u003e to control depth of field, and the \u003cstrong\u003e17 aperture blades\u003c\/strong\u003e create smooth, pleasing bokeh. The \u003cstrong\u003e5m closest focus distance\u003c\/strong\u003e also makes it viable for capturing distant terrestrial subjects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the adjustable aperture on the FRA400C?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adjustable aperture serves two main purposes. For \u003cstrong\u003eterrestrial photography\u003c\/strong\u003e, it allows you to control exposure and depth of field, just like a standard camera lens. For \u003cstrong\u003eastrophotography\u003c\/strong\u003e, while you'll typically shoot wide open at f\/5.6 for maximum light gathering, stopping down can be used to sharpen bright stars or create diffraction spikes for artistic effect, particularly on bright targets like the stars in the Pleiades (M45).\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\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e72mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuintuplet dual ED air-spaced APO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture Blades\u003c\/td\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture Range\u003c\/td\u003e\n\u003ctd\u003ef\/5.6 - f\/22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClosest Focus Distance\u003c\/td\u003e\n\u003ctd\u003e5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocusing Mode\u003c\/td\u003e\n\u003ctd\u003eManual Focus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront Filter Diameter\u003c\/td\u003e\n\u003ctd\u003eM82\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e2.68kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e3.18kg (including handle \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e370mm (including dew shield), 420mm (without dew shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Adapters\u003c\/td\u003e\n\u003ctd\u003eM72, M54, M48 (with M48×0.75 filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm recommended (supports 50-60mm range)\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\"\u003e1.25\"\/2\" Adapter\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\"\u003eManual\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\/Askar_FRA400C_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":49856589168925,"sku":"ASK-FRA400C","price":1253.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-FRA400C-1.jpg?v=1743617369"},{"product_id":"askar-80ed-f-7-doublet","title":"Askar 80ED f\/7 Doublet","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e560mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/7 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eTriplet Objective with ED Glass\u003c\/li\u003e\n\u003cli\u003eAPS-C Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003e55mm Back Focus\u003c\/li\u003e\n\u003cli\u003e0.42kg Weight\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\u003eAskar 80ED f\/7 Doublet\u003c\/h2\u003e\n\u003cp\u003eThe Askar 80ED f\/7 is built around a 560mm focal length triplet objective that incorporates one ED glass element for well-corrected images. It delivers a corrected image circle optimized for APS-C sensors and provides a standard 55mm of back focus from its M48x0.75 male thread. The entire optical system weighs just 0.42kg, establishing a highly portable core for a grab-and-go astrophotography rig.\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\u003eTriplet ED Optics: 560mm Focal Length at f\/7\u003c\/h3\u003e\n\u003cp\u003eThe heart of the Askar 80ED is its air-spaced triplet objective lens, which includes an element of extra-low dispersion (ED) glass to minimize chromatic aberration. This design ensures that stars of different colors focus at the same point, resulting in sharp, high-contrast images without distracting color fringing around bright objects. The native 560mm focal length at f\/7 provides an ideal image scale for many popular deep-sky targets, from open clusters to larger nebulae.\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\u003eImaging Train: 55mm Back Focus for APS-C Sensors\u003c\/h3\u003e\n\u003cp\u003eAskar engineered the 80ED for straightforward camera integration. The system provides a 55mm back focus distance measured from the base of the M48x0.75 thread, which is the industry standard for DSLR and mirrorless cameras when used with a corresponding T-ring. The corrected image circle is sized for APS-C sensors, covering the chips used in a vast majority of dedicated astronomy cameras and consumer DSLRs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Threads:\u003c\/strong\u003e The rear of the OTA terminates in both M54×0.75 and M48×0.75 threads, providing flexibility for connecting various accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Filter Holder:\u003c\/strong\u003e The M48 connection includes internal threads, allowing you to mount standard 2-inch filters directly into the imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAPS-C Limitation:\u003c\/strong\u003e While the image circle fully illuminates APS-C sensors, it is not designed for full-frame (35mm) sensors and will show significant vignetting at the edges of a larger format.\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\u003eSystem Modularity: A Lightweight 0.42kg Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eWeighing only 0.42kg, the Askar 80ED is exceptionally lightweight, making it a perfect match for portable tracking mounts that have limited payload capacity. This instrument is designed as the core of a flexible imaging system, with optional, dedicated focal reducers and flatteners available separately. These accessories allow you to alter the focal ratio for faster imaging and a wider field of view, adapting the telescope's performance to different celestial targets without compromising image quality.\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 astronomical objects is the Askar 80ED best suited for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 560mm focal length, the Askar 80ED excels at imaging medium-to-large deep-sky objects. It's ideal for targets like the Andromeda Galaxy (M31), the Orion Nebula (M42), and large open star clusters like the Pleiades (M45), framing them well on a typical APS-C sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Askar 80ED support full-frame cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Askar 80ED is designed with a corrected image circle specifically for \u003cstrong\u003eAPS-C sensors\u003c\/strong\u003e. While a full-frame camera can be attached, you will experience significant vignetting and distortion in the corners of the image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to connect my DSLR camera to the Askar 80ED?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 80ED provides a standard \u003cstrong\u003e55mm back focus\u003c\/strong\u003e from its M48 thread. To connect a DSLR or mirrorless camera, you will need a standard M48 T-ring specific to your camera's lens mount (e.g., Canon EOS or Nikon F).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar 80ED a good choice for imaging the North America Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, especially when paired with an optional focal reducer. At its native 560mm focal length, you can capture detailed sections of the nebula. Adding a reducer provides a wider field of view, allowing you to fit the entire nebula and the adjacent Pelican Nebula (IC 5070) into a single frame with an APS-C sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 80ED for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Askar 80ED is optically optimized for astrophotography, it can certainly be used for visual astronomy. You will need to add a diagonal, an eyepiece holder, and eyepieces. Its ED triplet lens will provide sharp, high-contrast views of the Moon, planets, and bright deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow portable is the Askar 80ED for field use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eExtremely portable. With a specified weight of just \u003cstrong\u003e0.42kg\u003c\/strong\u003e, the Askar 80ED is one of the lightest telescopes in its class. This makes it an ideal companion for lightweight star trackers and portable equatorial mounts for imaging sessions away from home.\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\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eTriplet with one ED glass element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e560mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003eAPS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm (from the base of M48 male thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.42 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Threads\u003c\/td\u003e\n\u003ctd\u003eM54×0.75 and M48×0.75 (with internal M48 filter threads)\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_80ED_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":50045859987741,"sku":"ASK-ASF80ED","price":559.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-80ED-Doublet-1.jpg?v=1749240259"},{"product_id":"askar-120apo-f-7-triplet","title":"Askar 120APO f\/7 Triplet","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e120mm Aperture Triplet Air-Spaced APO Objective\u003c\/li\u003e\n\u003cli\u003eIncludes one ED Glass Element for Superb Color Correction\u003c\/li\u003e\n\u003cli\u003e840mm Focal Length at a Native f\/7 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eLightweight 6.5 kg Total Weight with Rings and Plate\u003c\/li\u003e\n\u003cli\u003eSupports a 44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003e3.3-inch Dual-Speed Rack \u0026amp; Pinion Focuser with 360° Rotator\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\u003eAskar 120APO f\/7 Triplet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Askar 120APO f\/7 Triplet refractor combines a 120mm aperture with an 840mm focal length in an optical tube assembly weighing just 6.5 kg with its rings and dovetail plate. Its air-spaced triplet objective, which includes one element of ED glass, delivers high-contrast, color-pure images across a 44mm image circle, making it a powerful and portable instrument for full-frame 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\u003e120mm f\/7 Triplet APO Optics: Light Gathering and Color Correction\u003c\/h3\u003e\n\u003cp\u003eThe core of the 120APO is its 120mm air-spaced triplet objective. This design leverages an ED (Extra-low Dispersion) glass element to sharply minimize chromatic aberration, ensuring stars are tight, color-fringing is suppressed, and contrast on planetary and deep-sky targets is maximized. At f\/7, the 840mm focal length provides the ideal image scale for resolving details in medium-to-large galaxies and planetary nebulae without demanding perfect seeing conditions.\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\u003eEngineered for Portability: A 6.5 kg Imaging Platform\u003c\/h3\u003e\n\u003cp\u003eAskar designed the 120APO for field use, keeping the total weight to an impressively low 6.5 kg. Thoughtful mechanical features enhance its portability and ease of use, from the retractable dew shield that shortens its length to 722mm for transport to the dual finder bases that provide mounting flexibility. The included 290mm Vixen-style dovetail plate is extended to make balancing the OTA with a full imaging train a straightforward process on most equatorial mounts.\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 Focuser: 3.3-inch Dual-Speed with 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eTo handle the demands of modern imaging cameras, the Askar 120APO is equipped with a robust 3.3-inch dual-speed rack and pinion focuser. This heavy-duty focuser provides 10 cm of precise travel, eliminating sag and tilt even with heavy camera and filter wheel combinations. A 360° rotator with a high-precision scale allows you to frame your target perfectly without rotating your entire imaging train.\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-Speed Imaging: Native f\/7 or Fast f\/5.6 with Optional Reducer\u003c\/h3\u003e\n\u003cp\u003eThe 120APO offers exceptional flexibility for astrophotographers. With the optional 1x flattener, it operates at its native 840mm focal length and f\/7 ratio, delivering a perfectly flat field for large sensors. For wider targets, the optional 0.8x reducer transforms the telescope into a fast f\/5.6 astrograph, capturing expansive nebulae like the North American Nebula (NGC 7000) with significantly shorter exposure times.\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\u003eAskar 120APO vs. 103APO: Aperture and Imaging Scale\u003c\/h3\u003e\n\u003cp\u003eFor imagers deciding between Askar's APO refractors, the primary difference is light-gathering power and resolution. The 120APO's aperture provides a 36% larger light-collecting area than the 103APO. This directly translates to brighter images, shorter required exposure times for faint targets, and a higher theoretical resolution limit, allowing you to resolve finer details in globular clusters and galactic structures.\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 astronomical mount is needed for the Askar 120APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a total weight of \u003cstrong\u003e6.5 kg\u003c\/strong\u003e for the OTA, rings, and plate, the Askar 120APO requires a stable equatorial mount. For imaging, a mount in the EQ6-R Pro or CEM40 class is recommended to handle the telescope plus the additional weight of a camera, guide scope, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the optional 0.8x reducer affect imaging the Andromeda Galaxy (M31) with the Askar 120APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 0.8x reducer shortens the focal ratio to \u003cstrong\u003ef\/5.6\u003c\/strong\u003e and the focal length to approximately 672mm. This creates a wider field of view, allowing you to more easily fit the entire Andromeda Galaxy and its satellite galaxies (M32 and M110) into the frame of a full-frame sensor. The faster focal ratio also reduces exposure times by about 36% compared to imaging at the native f\/7.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar 120APO suitable for visual use with a binoviewer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Askar 120APO features a detachable lens tube segment. This design allows you to shorten the optical path, providing the necessary back focus to reach focus with most binoviewers without needing a barlow or optical corrector assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the maximum camera sensor size for the Askar 120APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 120APO is designed to fully illuminate a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e when used with its dedicated 1x flattener or 0.8x reducer. This makes it an excellent match for cameras with full-frame (36x24mm) sensors, providing corrected, unvignetted stars across the entire field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 120APO for high-magnification views of Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. As a \u003cstrong\u003e120mm apochromatic refractor\u003c\/strong\u003e, its high-contrast, color-free optics are ideal for planetary observation. Using a high-quality Barlow lens and a short focal length eyepiece, you can easily push the magnification to see fine details like the cloud bands of Jupiter, the Great Red Spot, and the Cassini Division in Saturn's rings under steady seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the dual finder bases on the Askar 120APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe dual finder bases provide flexibility. You can mount a finder scope on one side and a guide scope on the other, or mount other accessories like a small computer or autofocuser controller. This eliminates the need to disassemble and move a single base when reconfiguring your setup.\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\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e840mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eTriplet air-spaced APO (including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e5.7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (w\/ Rings \u0026amp; Plate)\u003c\/td\u003e\n\u003ctd\u003e6.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Dew Shield Contracted)\u003c\/td\u003e\n\u003ctd\u003e722mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Dew Shield Stretched)\u003c\/td\u003e\n\u003ctd\u003e804mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-End Adapters\u003c\/td\u003e\n\u003ctd\u003e2\" and 1.25\"\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\"\u003eAskar 120APO OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 pair\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\"\u003eCarry Handle\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\"\u003eAskar 290mm Vixen Dovetail Plate\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\"\u003eOxford Cloth Case\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\"\u003eInstruction Manual\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\/Askar_120APO_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software \u0026amp; Drivers\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":50290226561309,"sku":"ASK-ASKAPO120","price":2379.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-120APO-Refractor-1.jpg?v=1756176065"},{"product_id":"askar-50p-f-3-8-quadruplet-apo-telescope","title":"Askar 50P f\/3.8 Quadruplet APO Telescope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Aperture Quadruplet APO Optics\u003c\/li\u003e\n\u003cli\u003eUltra-Fast f\/3.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e190mm Focal Length\u003c\/li\u003e\n\u003cli\u003eNatively Flat Field for APS-C Sensors\u003c\/li\u003e\n\u003cli\u003eStandard 55mm Back Focus Requirement\u003c\/li\u003e\n\u003cli\u003eCompact 147mm Length and 1.4kg Weight\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\u003eAskar 50P f\/3.8 Quadruplet APO Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Askar 50P f\/3.8 Quadruplet APO Telescope combines a 50mm aperture with a fast 190mm focal length for ambitious wide-field imaging. Its quadruplet Petzval optical design delivers a natively flat field suitable for up to APS-C format sensors, while its compact 147mm length and 1.4kg weight make it the definitive grab-and-go astrograph.\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\u003eUltra-Fast f\/3.8 Quadruplet APO Optics\u003c\/h3\u003e\n\u003cp\u003eAt f\/3.8, the Askar 50P gathers light dramatically faster than typical refractors, allowing you to capture deep signal on faint nebulae in a fraction of the time. The quadruplet Petzval design, which includes one piece of SD glass, corrects for chromatic aberration and field curvature without the need for an additional flattener, ensuring sharp, color-pure stars across the entire frame.\u003c\/p\u003e\n\u003cp\u003eThe 190mm focal length produces an expansive field of view, perfect for framing large celestial canvases. Targets like the Andromeda Galaxy (M31), the North American Nebula (NGC 7000), and the vast Rho Ophiuchi cloud complex fit comfortably within the frame of a modern APS-C 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\u003eFlat-Field Imaging for APS-C with 55mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe Askar 50P is engineered for seamless camera integration. The optical system is optimized for 1-inch sensors but provides excellent correction for larger APS-C formats, delivering a corrected image circle without the complexity of calculating spacing for a separate reducer or flattener. This simplifies your imaging train and eliminates potential sources of tilt.\u003c\/p\u003e\n\u003cp\u003eConnection is made via a standard M48 adapter, requiring a common 55mm back focus. This is compatible with most dedicated astronomy cameras and DSLR\/mirrorless cameras using a standard M48 T-ring. The focuser also supports a back focus range from 50mm to 65mm, offering flexibility for unique imaging setups.\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\u003eCompact and Lightweight at 1.4kg for Grab-and-Go Imaging\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability, the Askar 50P weighs just 1.4kg and measures a mere 147mm with its dew shield retracted. This minimal footprint makes it an ideal companion for lightweight star trackers and portable mounts, allowing you to set up a powerful imaging rig far from city lights without hauling heavy equipment.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSliding Dew Shield:\u003c\/strong\u003e The integrated dew shield extends to 182mm, providing excellent protection from stray light and moisture during long imaging sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid Construction:\u003c\/strong\u003e Despite its small size, the telescope is built for rigidity, ensuring the optical elements remain perfectly collimated from your backyard to a remote dark-sky site.\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\u003eAskar 50P vs. RedCat 51: Focal Ratio and Field of View\u003c\/h3\u003e\n\u003cp\u003eWhen choosing a portable astrograph, the primary competitor to the Askar 50P is the William Optics RedCat 51. While both are excellent Petzval designs, they serve different imaging goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitor Advantage (RedCat 51):\u003c\/strong\u003e The RedCat offers a slightly larger 51mm aperture and a longer 250mm focal length. This provides a tighter field of view and more image scale, which can be beneficial for framing smaller deep-sky objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 50P Advantage:\u003c\/strong\u003e The 50P's key advantage is its f\/3.8 focal ratio, which is significantly faster than the RedCat's f\/4.9. This allows for roughly 68% more light gathering in the same amount of time, drastically reducing required exposure times. Its 190mm focal length also captures a wider true field of view, ideal for the largest nebulae and mosaics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYour choice depends on your primary targets. For the widest possible vistas and the shortest possible exposures, the Askar 50P is the superior instrument.\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\"\u003eDo I need a field flattener for the Askar 50P telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Askar 50P uses a \u003cstrong\u003equadruplet Petzval optical design\u003c\/strong\u003e, which has a built-in corrector. It produces a natively flat field suitable for up to APS-C sensors without requiring any additional flattener or reducer.\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 Askar 50P's f\/3.8 focal ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003ef\/3.8 focal ratio\u003c\/strong\u003e is extremely fast, allowing the telescope to collect a large amount of light in a short period. This means you can use shorter sub-exposures to capture faint details in nebulae and galaxies, reducing issues with guiding, tracking, and changing sky conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the correct back focus for the Askar 50P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe recommended back focus is \u003cstrong\u003e55mm\u003c\/strong\u003e from the base of the rear M48 threads. This is the standard distance for most dedicated astronomy cameras and for DSLR\/mirrorless cameras when using a compatible T-ring. The system supports a total range of 50mm to 65mm for added flexibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera sensor is the Askar 50P designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 50P provides a corrected image circle that supports \u003cstrong\u003eAPS-C format sensors\u003c\/strong\u003e and is specifically optimized for 1-inch sensors. This makes it compatible with a wide range of popular CMOS astronomy cameras and many DSLR\/mirrorless models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required to image with the Askar 50P?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a gross weight of only \u003cstrong\u003e1.4kg\u003c\/strong\u003e, the Askar 50P is exceptionally lightweight. It can be carried easily by compact, portable tracking mounts like the Sky-Watcher Star Adventurer or iOptron SkyGuider Pro, making it an ideal choice for a travel imaging setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar 50P's 190mm focal length suitable for large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, perfectly. The \u003cstrong\u003e190mm focal length\u003c\/strong\u003e provides a very wide field of view that is ideal for framing enormous targets. With an APS-C sensor, you can easily capture the full expanse of the Andromeda Galaxy (M31), the North American Nebula (NGC 7000), or the Veil Nebula complex in a single shot.\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\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e190mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuadruplet Petzval APO (with one SD glass element)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003eSupports APS-C format (optimized for 1-inch sensors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Dew Shield Contracted)\u003c\/td\u003e\n\u003ctd\u003e147mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Dew Shield Stretched)\u003c\/td\u003e\n\u003ctd\u003e182mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e1.4kg (including tube ring and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-end Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm Recommended (50-65mm range supported)\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\"\u003eAskar 50P OTA\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\"\u003eManual\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.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software \u0026amp; Drivers\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":50980013900061,"sku":"ASK-50P","price":419.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-50P-Quadruplet-Telescope-1.jpg?v=1772217458"},{"product_id":"askar-sqa60-pro-60mm-f-4-6-sextuplet-apo","title":"Askar SQA60 Pro 60mm f\/4.6 Sextuplet APO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e60mm Aperture Sextuplet APO Optics\u003c\/li\u003e\n\u003cli\u003e276mm Focal Length at a Fast f\/4.6\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003eIntegrated Petzval Design with 2 SD Glass Elements\u003c\/li\u003e\n\u003cli\u003e3.54kg Gross Weight with Rings and Plate\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\u003eAskar SQA60 Pro 60mm f\/4.6 Sextuplet APO\u003c\/h2\u003e\n\u003cp\u003eThe Askar SQA60 Pro integrates a 60mm sextuplet APO optical system into a compact tube, delivering a 276mm focal length at a fast f\/4.6. Its Petzval design, incorporating two SD glass elements, produces a corrected 44mm image circle for full-frame sensors, all within a 283mm-long OTA weighing just 2.79kg.\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\u003eSextuplet Petzval Optics: A 44mm Flat Field at f\/4.6\u003c\/h3\u003e\n\u003cp\u003eThe SQA60 Pro's optical core is a six-element Petzval apochromat, engineered to deliver a flat field across a 44mm image circle without an external flattener. This integrated design uses two pieces of Super-low Dispersion (SD) glass to ensure sharp, high-contrast stars with negligible chromatic aberration, even on bright targets. The native f\/4.6 focal ratio gathers significant light quickly, reducing sub-exposure times needed to capture faint details in nebulae like the North American Nebula (NGC 7000) or the Heart Nebula (IC 1805).\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\u003eImaging-Ready Mechanics: 3.54kg Gross Weight and 41-66mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eEngineered for portability and stability, the SQA60 Pro has a gross weight of 3.54kg with its tube ring and dovetail, making it a perfect match for lightweight tracking mounts. The telescope's rear M48 adapter includes standard M48x0.75 filter threads and supports a flexible back focus distance from 41mm to 66mm. This range accommodates a wide variety of cameras, filter wheels, and off-axis guiders, with a recommended spacing of 55mm for optimal performance with most standard imaging trains.\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\u003eSQA60 Pro: Eliminating the 2-Part Doublet + Flattener System\u003c\/h3\u003e\n\u003cp\u003eUnlike a conventional refractor that requires a separate, carefully spaced flattener, the SQA60 Pro's sextuplet design corrects for field curvature internally. This single-tube solution removes the potential for tilt and spacing errors that can compromise a two-part optical system. The trade-off for this guaranteed performance is a fixed focal length; however, for wide-field imagers seeking a reliable, grab-and-go instrument, the SQA60 Pro's integrated approach is a significant advantage.\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 targets is the Askar SQA60 Pro's 276mm focal length best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eAskar SQA60 Pro\u003c\/strong\u003e, with its 276mm focal length, is ideal for large deep-sky objects and wide star fields. It can frame massive targets like the Andromeda Galaxy (M31), the entire Veil Nebula complex, or the Rho Ophiuchi cloud complex in a single shot using a full-frame camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the correct back focus for my camera with the Askar SQA60 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eAskar SQA60 Pro\u003c\/strong\u003e supports a back focus range of \u003cstrong\u003e41mm to 66mm\u003c\/strong\u003e from the M48 thread. The recommended distance is \u003cstrong\u003e55mm\u003c\/strong\u003e, which is the standard for most DSLR\/mirrorless cameras with a T-ring and many dedicated astronomy cameras. You simply add or remove spacers in your imaging train to achieve this distance for optimal star shapes across the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Askar SQA60 Pro require a separate field flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The \u003cstrong\u003eAskar SQA60 Pro\u003c\/strong\u003e features an integrated sextuplet Petzval optical design. This means the field-flattening elements are built directly into the main telescope tube, so it produces a flat field out of the box without needing any additional corrective optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use full-frame cameras with the Askar SQA60 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The telescope is designed to fully illuminate and correct a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e, making it perfectly compatible with full-frame (36x24mm) sensors. You will not experience significant vignetting or distorted stars at the edge of a full-frame sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size mount do I need for the 3.54kg Askar SQA60 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a fully loaded weight of \u003cstrong\u003e3.54kg\u003c\/strong\u003e (plus your camera and guide scope), the \u003cstrong\u003eAskar SQA60 Pro\u003c\/strong\u003e is well-suited for portable tracking mounts in the 10-15kg payload class. Mounts like the Sky-Watcher HEQ5, iOptron CEM26\/GEM28, or similar models will provide excellent stability for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar SQA60 Pro's f\/4.6 ratio affect my exposure times?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/4.6 focal ratio\u003c\/strong\u003e allows the \u003cstrong\u003eAskar SQA60 Pro\u003c\/strong\u003e to collect light much faster than a typical f\/6 or f\/7 refractor. This means you can use shorter sub-exposures to capture the same amount of detail, which helps minimize issues with tracking errors, satellites, and changing sky conditions.\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\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e276mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eSextuplet Petzval APO (includes 2 SD glass elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e283mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e2.79kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e3.54kg (including tube ring and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-end Thread\u003c\/td\u003e\n\u003ctd\u003eM48 Adapter (with M48×0.75 filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Distance\u003c\/td\u003e\n\u003ctd\u003e41mm - 66mm range (55mm recommended)\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\"\u003eSQA60 Pro OTA\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\"\u003eOxford Cloth 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\/Askar_SQA60_Pro_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":51314874220829,"sku":"ASK-SQA60","price":1792.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA60-Sextuplet-Refractor-6.jpg?v=1779373604"},{"product_id":"askar-n160-f-3-6-newtonian","title":"Askar N160 f\/3.6 Newtonian","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e160mm Aperture Parabolic Mirror\u003c\/li\u003e\n\u003cli\u003ef\/3.4 Focal Ratio with Included 0.95x Corrector\u003c\/li\u003e\n\u003cli\u003e544mm Corrected Focal Length\u003c\/li\u003e\n\u003cli\u003eCarbon Fiber Tube Construction\u003c\/li\u003e\n\u003cli\u003e3.97kg Optical Tube Assembly Weight\u003c\/li\u003e\n\u003cli\u003eDesigned for APS-C (28mm) Image Circles\u003c\/li\u003e\n\u003cli\u003eStandard 55mm Back Focus from M48 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\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\u003eAskar N160 f\/3.6 Newtonian Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar N160 f\/3.6 Newtonian combines a 160mm parabolic primary mirror with an included 0.95x triplet coma corrector to create an exceptionally fast f\/3.4, 544mm focal length imaging system. Weighing just 3.97kg, the carbon fiber optical tube is optimized for deep-sky astrophotography with APS-C format sensors, delivering a 0.73\" theoretical resolution. The integrated corrector provides a standard 55mm back focus from its M48x0.75 threads, simplifying camera and accessory integration for capturing wide-field 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\u003eFast f\/3.4 Imaging: 160mm Aperture with a 0.95x Corrector\u003c\/h3\u003e\n\u003cp\u003eThe optical system is built for speed and light-gathering power. The 160mm primary mirror collects significant signal, while the f\/3.4 corrected focal ratio allows you to capture faint details in nebulae and galaxies with shorter sub-exposure times. This reduces demands on your mount's tracking accuracy and allows more data to be collected in a single session.\u003c\/p\u003e\n\u003cp\u003eThe included 0.95x triplet corrector is essential for a fast Newtonian, sharpening stars across the APS-C (28mm) image circle and preventing the characteristic comatic aberration that affects parabolic mirrors. With the corrector, the focal length is a wide-field 544mm, perfect for framing large targets like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31).\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\u003eCarbon Fiber Tube: A 3.97kg OTA for Thermal Stability\u003c\/h3\u003e\n\u003cp\u003eConstructed from carbon fiber, the optical tube offers superior thermal stability compared to aluminum. This minimizes focus shift during long imaging sessions as ambient temperatures drop, keeping your stars sharp from dusk till dawn. The material choice also contributes to the low optical tube weight of just 3.97kg.\u003c\/p\u003e\n\u003cp\u003eEven when fully equipped with the included tube rings, 230mm dovetail plate, and corrector, the gross weight is only 5.2kg. This makes the N160 compatible with a wide range of mid-capacity equatorial mounts, creating a portable deep-sky imaging rig that doesn't require a massive, observatory-class platform.\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\u003eAPS-C Optimized: 55mm Back Focus and M48 Threads\u003c\/h3\u003e\n\u003cp\u003eThe Askar N160 is engineered for seamless integration into modern astrophotography workflows. The corrector terminates in a standard M48x0.75 male thread, and the system is designed to achieve critical focus at a 55mm distance from this thread's shoulder. This industry-standard spacing is compatible with most dedicated astronomy cameras, filter wheels, and off-axis guiders right out of the box.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAPS-C Format:\u003c\/strong\u003e The triplet corrector is designed to fully illuminate APS-C sensors, providing a corrected and unvignetted field of 28mm. This makes it an ideal match for popular cameras using sensors like the IMX571.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Spacing:\u003c\/strong\u003e The package includes sets of 0.1mm, 0.2mm, and 0.3mm shims, allowing you to fine-tune the 55mm back focus to compensate for filter thickness or sensor-plane variations, ensuring optimal optical correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-off:\u003c\/strong\u003e While excellent for APS-C, this system is not designed to illuminate full-frame sensors without some vignetting at the corners.\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 kind of mount do I need for the Askar N160?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a fully loaded weight of 5.2kg (11.5 lbs), the Askar N160 is well-suited for equatorial mounts with a payload capacity of at least 20-25 lbs for imaging. This ensures stable tracking and guiding. Mounts like the Sky-Watcher HEQ5, iOptron GEM28, or Celestron Advanced VX are appropriate choices.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar N160 compatible with full-frame cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Askar N160 and its included 0.95x corrector are specifically designed to provide a corrected image circle of 28mm, which is ideal for \u003cstrong\u003eAPS-C format sensors\u003c\/strong\u003e. While a full-frame camera can be attached, you will experience significant vignetting and edge-of-field aberrations beyond the specified image circle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I achieve the 55mm back focus with the Askar N160?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 55mm back focus is measured from the shoulder of the M48x0.75 male thread on the corrector. You must ensure the total light path distance of all accessories between the corrector and your camera sensor is exactly 55mm. A typical setup includes a 2\" filter drawer or wheel and any necessary extension tubes. The included shims can be used for precise final adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Askar N160's carbon fiber tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit of the carbon fiber tube is its low coefficient of thermal expansion. This means it does not shrink or expand significantly with temperature changes throughout the night, which helps keep the telescope in focus for longer periods. It also contributes to the OTA's low weight of just 3.97kg, making it more portable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar N160 frame large targets like the Veil Nebula complex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar N160's 544mm focal length is excellent for large deep-sky objects. When paired with a common APS-C sensor (like the Sony IMX571), it produces a field of view of approximately 2.5° x 1.7°. This is wide enough to capture the entire Veil Nebula complex, including both the Eastern Veil (NGC 6992) and Western Veil (NGC 6960), in a single frame with room to spare.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar N160 for visual astronomy or planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Askar N160 is designed as an astrograph for photography, you can use it for visual observing by adding a 2\" eyepiece holder and eyepiece. However, its very fast focal ratio may be demanding on eyepieces. For planetary imaging of targets like Jupiter or Saturn, its 544mm focal length is quite short; you would need a powerful Barlow lens (5x or more) to achieve the necessary image scale, which can be challenging.\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\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e160mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e576mm (without Corrector) \/ 544mm (with Corrector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.6 (without Corrector) \/ f\/3.4 (with Corrector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Mirror Type\u003c\/td\u003e\n\u003ctd\u003eParabolic mirror\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Type\u003c\/td\u003e\n\u003ctd\u003eTriplet design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Reduction Factor\u003c\/td\u003e\n\u003ctd\u003e0.95x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e28mm (APS-C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.73\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm (from M48 thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Thread\u003c\/td\u003e\n\u003ctd\u003eM48 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e467mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e193mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Minor Axis\u003c\/td\u003e\n\u003ctd\u003e61mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e3.97kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector Weight\u003c\/td\u003e\n\u003ctd\u003e0.22kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e5.2kg (including handle, tube rings, dovetail plate, and corrector)\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\"\u003eAskar N160 OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003e230mm Dovetail Plate\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\"\u003eMultifunctional Handle\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\"\u003e0.95x Coma Corrector\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\"\u003eM58 to M48 Adapter\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\"\u003e0.1mm Shim\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\"\u003e0.2mm Shim\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\"\u003e0.3mm Shim\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\"\u003eInstruction Manual\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\/Askar_N160_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" 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\"\u003eDownload Software\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52662253158685,"sku":"ASK-N160","price":1538.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-N160-Newtonian.jpg?v=1785458015"},{"product_id":"askar-sqa130","title":"Askar SQA130 f\/4.8 Quintuplet Petzval Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e130mm Aperture Quintuplet Petzval APO Optics\u003c\/li\u003e\n\u003cli\u003e624mm Focal Length at a Fast f\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e55mm Corrected Image Circle for Medium Format Sensors\u003c\/li\u003e\n\u003cli\u003eIncludes Two SD (Super ED) Glass Elements\u003c\/li\u003e\n\u003cli\u003e11.76kg Gross Weight with Included Tube Rings \u0026amp; Dovetail\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\u003eAskar SQA130 f\/4.8 Quintuplet Petzval Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar SQA130 combines a 130mm aperture with a fast f\/4.8 focal ratio, delivered through an advanced quintuplet Petzval optical system. This design, incorporating two pieces of SD glass, produces a massive 55mm corrected image circle, eliminating the need for a separate flattener while fully illuminating medium format sensors. With a native focal length of 624mm and a gross weight of 11.76kg, the SQA130 is a dedicated astrograph built for capturing wide, perfectly flat fields of deep-sky objects.\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\u003e130mm f\/4.8 Quintuplet Petzval Optics: A 55mm Flat-Field Design\u003c\/h3\u003e\n\u003cp\u003eThe SQA130's optical core is a 5-element Petzval design, which places the correcting lenses inside the optical tube for a permanently optimized, flat field. This integrated system produces pinpoint stars across a huge 55mm image circle, exceeding the 44mm diagonal of full-frame sensors and accommodating larger medium format chips without vignetting or field curvature. The inclusion of two SD glass elements ensures high-contrast images with sharp stars and minimal chromatic aberration.\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\u003eSeamless Camera Integration: M68, M54, and M48 Adapters\u003c\/h3\u003e\n\u003cp\u003eAskar has engineered the SQA130 for direct and robust camera connection. The rear of the focuser terminates in an M68x1 thread, and the telescope includes M54 and M48 adapters to match the most common standards for full-frame cameras, filter wheels, and off-axis guiders. The system is designed for a recommended back focus of 55mm, but offers an adjustment range from 46mm to 76mm to accommodate nearly any imaging train configuration.\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\u003eEngineered for Stability: 11.76kg Gross Weight and 650mm Length\u003c\/h3\u003e\n\u003cp\u003eWith a total weight of 11.76kg including its tube rings and dovetail plate, the SQA130 requires a stable equatorial mount in the EQ6 class or greater for reliable tracking. The optical tube has a compact transport length of just 650mm with its dew shield retracted, which extends to 764mm to block stray light and mitigate dew formation during long imaging sessions. This robust mechanical build ensures the heavy-duty focuser can handle large camera packages without flexure.\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\u003eSQA130 vs. Triplet APOs: The Advantage of an Integrated Petzval Design\u003c\/h3\u003e\n\u003cp\u003eWhile a high-quality 130mm triplet refractor can produce excellent images, it requires a separate, correctly spaced field flattener to achieve a flat field, adding complexity and potential for tilt. The Askar SQA130's integrated Petzval design eliminates these variables entirely. You get a perfectly flat, wide field right out of the box with no extra accessories to buy or configure. The trade-off is a fixed focal length, but for imagers seeking a simple, powerful, and wide-field instrument, the SQA130 offers a more streamlined and reliable solution.\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 Askar SQA130's 55mm image circle handle large targets like the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 55mm image circle of the Askar SQA130 is significantly larger than the 44mm diagonal of a full-frame sensor. This means when imaging a vast object like the Andromeda Galaxy (M31), you will have perfectly sharp, unvignetted stars from one corner of your sensor to the other, capturing the full extent of the galaxy's spiral arms and dust lanes in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required to properly support the 11.76kg gross weight of the Askar SQA130?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo ensure stable, precise tracking for long-exposure astrophotography, a mount with a payload capacity of at least 20kg (44 lbs) is recommended for the 11.76kg Askar SQA130. This typically corresponds to mounts in the Sky-Watcher EQ6-R Pro, iOptron CEM40\/GEM45, or a higher capacity class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy a separate field flattener for the Askar SQA130?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The \u003cstrong\u003equintuplet Petzval optical design\u003c\/strong\u003e of the Askar SQA130 has the field-flattening elements built directly into the optical tube. It is designed to produce a flat field across its 55mm image circle without any additional correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the quintuplet Petzval design in the Askar SQA130?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is simplicity and optical optimization. A Petzval design provides a wide, flat, and highly corrected field of view in a self-contained system. This means you don't have to worry about calculating the correct spacing for a separate flattener, which eliminates a common source of error and frustration in astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my camera to the Askar SQA130 to achieve the correct 55mm back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar SQA130 includes M68, M54, and M48 adapters. You simply choose the adapter that matches your camera or filter wheel threads and add standard spacers (not included) to achieve the \u003cstrong\u003e55mm recommended distance\u003c\/strong\u003e from the adapter's flange to your camera sensor. The system allows a total range of 46mm to 76mm for flexibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the two SD glass elements in the SQA130's objective lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003etwo pieces of SD (Super-low Dispersion) glass\u003c\/strong\u003e are used to minimize chromatic aberration, also known as color fringing. This ensures that stars of different colors come to the same sharp focus, resulting in higher contrast, tighter star points, and no distracting purple halos around bright stars.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e130mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e624mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens Design\u003c\/td\u003e\n\u003ctd\u003eQuintuplet Petzval APO (with 2 SD glass elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Image Circle\u003c\/td\u003e\n\u003ctd\u003e55mm (Medium Format), 44mm (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm recommended (46-76mm adjustable range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Adapters\u003c\/td\u003e\n\u003ctd\u003eM68, M54, M48 included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e650mm (dew shield contracted) \/ 764mm (dew shield extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e9.18kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e11.76kg (including tube rings and dovetail plate)\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_SQA130_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSQA130 OTA\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\"\u003eOxford Cloth 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851326026013,"sku":"ASK-SQA130","price":6719.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA130-1_678dcb0a-c045-451c-a2a6-1cfce92e0f54.jpg?v=1788401634"},{"product_id":"askar-65phq","title":"Askar 65PHQ f\/6.4 Quintuplet Flat-Field Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e65mm Aperture Quintuplet APO Optical Design\u003c\/li\u003e\n\u003cli\u003e416mm Focal Length at f\/6.4\u003c\/li\u003e\n\u003cli\u003eBuilt-in Field Flattener with 44mm Image Circle\u003c\/li\u003e\n\u003cli\u003e2.8kg Total Weight Including Rings and Dovetail Plate\u003c\/li\u003e\n\u003cli\u003eIncludes M68, M54, and M48 Camera Adapters\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\u003eAskar 65PHQ f\/6.4 Quintuplet Flat-Field Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar 65PHQ is a portable imaging instrument that delivers a perfectly flat 44mm image circle without external correctors. Its 65mm quintuplet objective lens, which includes two ED glass elements, operates at a focal length of 416mm and a focal ratio of f\/6.4 to produce high-contrast, color-pure images. Weighing just 2.8kg fully equipped, the 65PHQ provides a complete, travel-friendly solution for full-frame 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\u003eBuilt-in Flattener: A 44mm Flat Field Right Out of the Box\u003c\/h3\u003e\n\u003cp\u003eThe core of the 65PHQ is its Petzval-like quintuplet optical design. This integrated system eliminates the need for a separate field flattener, removing the complexity of calculating back focus and spacing. The result is a 44mm corrected image circle, capable of illuminating full-frame sensors with sharp stars from edge to edge. The inclusion of two ED (Extra-low Dispersion) glass elements ensures chromatic aberration is suppressed, preserving the natural color of stars and the subtle details in nebulae.\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\u003eCompact and Robust: 2.8kg of Imaging-Ready Engineering\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability, the 65PHQ's optical tube weighs only 2kg, and the complete package with rings, handle, and dovetail plate comes in at a mere 2.8kg. Its contracted length of just 328mm makes it easy to pack and mount on lightweight, travel-friendly trackers. The scope features a 2.5\" rack-and-pinion focuser with a 360° rotator for precise camera framing, a retractable dew shield, and a Vixen-style dovetail plate, providing a rigid and stable platform for 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\u003eDirect-Thread Connection: M68, M54, and M48 Adapters Included\u003c\/h3\u003e\n\u003cp\u003eThe 65PHQ ensures a secure, flex-free connection to your imaging train. It includes a set of three photographic adapters, stepping down from the focuser's native M68x1 thread to M54x0.75 and finally to the widely used M48x0.75. This allows direct, threaded attachment of most astronomy cameras, filter wheels, and off-axis guiders. The final M48 adapter is also threaded internally to accept standard 2-inch astronomy 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\u003eAstrograph and Visual Scope: f\/6.4 Versatility\u003c\/h3\u003e\n\u003cp\u003eWhile engineered as an astrograph, the 65PHQ is also a capable visual instrument. The f\/6.4 focal ratio provides bright, wide-field views of open clusters and large nebulae like the North American Nebula (NGC 7000). The high-quality optics also support higher magnification for observing planets and the Moon, making it a versatile grab-and-go telescope for both imaging and visual nights under the stars.\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\u003eAskar 65PHQ vs. 80PHQ: Portability Meets Optical Correction\u003c\/h3\u003e\n\u003cp\u003eThe primary advantage of the 65PHQ over its larger sibling, the 80PHQ, is its exceptional portability. The 65PHQ is lighter and more compact, making it a better match for smaller equatorial mounts and star trackers. Here’s how they compare:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 80PHQ Advantage:\u003c\/strong\u003e The 80mm aperture gathers more light and provides higher resolution, making it better suited for smaller, fainter targets. Its 600mm focal length offers more image scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 65PHQ Advantage:\u003c\/strong\u003e With an OTA weight of only 2kg (vs. the 80PHQ's 3.2kg), the 65PHQ is significantly easier to mount and balance. Its wider 416mm field of view is ideal for capturing large nebulae and constellations in a single frame.\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 makes the Askar 65PHQ an \"astrograph\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe term \"astrograph\" signifies that the Askar 65PHQ is designed specifically for photography. Its \u003cstrong\u003equintuplet optical system\u003c\/strong\u003e has a built-in flattener that corrects for field curvature, ensuring stars remain sharp across its entire \u003cstrong\u003e44mm image circle\u003c\/strong\u003e without needing extra accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate flattener or reducer for the 65PHQ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Askar 65PHQ has a built-in field flattener as part of its native optical design. You do not need to purchase an additional flattener. Simply attach your camera using the included adapters, achieve focus, and you will have a corrected field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size camera sensor is the Askar 65PHQ designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 65PHQ is designed to fully illuminate and correct a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e. This makes it an excellent match for cameras with full-frame (36x24mm) sensors, as well as smaller APS-C and Micro Four Thirds sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 65PHQ frame a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its \u003cstrong\u003e416mm focal length\u003c\/strong\u003e, the Askar 65PHQ provides a wide field of view. When paired with a full-frame camera, it can easily capture the entire Andromeda Galaxy (M31), including its satellite galaxies M32 and M110, with plenty of surrounding space, making it ideal for large-scale mosaics or single-shot compositions of expansive 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 Askar 65PHQ on a portable mount for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With a total weight of only \u003cstrong\u003e2.8kg\u003c\/strong\u003e, the 65PHQ is an excellent choice for portable alt-azimuth or small equatorial mounts. For visual use, its f\/6.4 optics provide bright, expansive views, making it a superb \"grab-and-go\" telescope for sweeping the Milky Way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapters are included with the 65PHQ for connecting my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 65PHQ comes with a 3-piece adapter set to ensure broad compatibility. The adapters provide threaded connections for \u003cstrong\u003eM68x1\u003c\/strong\u003e, \u003cstrong\u003eM54x0.75\u003c\/strong\u003e, and \u003cstrong\u003eM48x0.75\u003c\/strong\u003e, allowing you to securely attach most dedicated astronomy cameras and DSLRs\/mirrorless cameras with the appropriate T-ring.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e416mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuintuplet air-spaced APO (including two ED glasses)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e2kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e2.8kg (Including tube rings \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e328mm (dew shield contracted) to 420mm (dew shield extended with adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Thread Type\u003c\/td\u003e\n\u003ctd\u003eM68×1, M54×0.75, M48×0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thread\u003c\/td\u003e\n\u003ctd\u003eM48×0.75 (inside M48 adapter)\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\"\u003e65PHQ OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eHandle\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\"\u003eAskar 300mm Vixen-style Dovetail Plate\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\"\u003e3-Piece Photographic Adapters\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Set\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\"\u003eManual\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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851326124317,"sku":"ASK-65PHQ","price":1259.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-65PHQ-1_bf592d2e-d6a8-49f2-b0a6-db0acc1c00d1.jpg?v=1788401643"},{"product_id":"askar-151phq","title":"Askar 151PHQ f\/7 Quadruplet Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e151mm Aperture Quadruplet APO Optics\u003c\/li\u003e\n\u003cli\u003e1057mm Focal Length at f\/7\u003c\/li\u003e\n\u003cli\u003eIntegrated Flattener for a 60mm Image Circle\u003c\/li\u003e\n\u003cli\u003eIncludes Two ED Glass Elements for Color Correction\u003c\/li\u003e\n\u003cli\u003e13.7kg Total Weight with Rings and 300mm Dovetail Plate\u003c\/li\u003e\n\u003cli\u003eFour-Piece Adapter Set for Direct Camera Connection\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\u003eAskar 151PHQ f\/7 Quadruplet Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar 151PHQ combines a massive 151mm aperture with an integrated flat-field quadruplet optical design, delivering a 1057mm focal length at a native f\/7. This astrograph is engineered to illuminate a 60mm image circle without requiring an external flattener, eliminating complex backfocus calculations. With two ED glass elements for superior color correction and a total weight of 13.7kg, the 151PHQ provides the light-gathering power and image scale for capturing detailed, wide-field views of deep-sky objects.\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\u003e151mm f\/7 Quadruplet APO Optics with 2 ED Elements\u003c\/h3\u003e\n\u003cp\u003eThe heart of the 151PHQ is its air-spaced quadruplet objective, which uses two extra-low dispersion (ED) glass elements to achieve apochromatic correction. This design aggressively suppresses chromatic aberration, ensuring stars are rendered as sharp, color-pure points without distracting halos. At 151mm of aperture and a 1057mm focal length, this instrument captures faint details on galaxies and nebulae with high resolution, making it ideal for serious deep-sky imagers.\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 60mm Flat Field: No External Flattener Required\u003c\/h3\u003e\n\u003cp\u003eUnlike traditional refractors, the 151PHQ features a built-in field flattener as part of its core optical design. This Petzval-like configuration produces a corrected, flat 60mm image circle, fully illuminating large full-frame and medium-format sensors without any additional hardware. You can attach your camera directly via the included adapters and start imaging, confident that stars will remain round and sharp from the center to the corners of your frame.\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\u003eImaging-Ready Mechanics: 13.7kg OTA with a 3.4\" Focuser\u003c\/h3\u003e\n\u003cp\u003eEngineered for stability, the 151PHQ weighs 11.6kg as an OTA and 13.7kg fully equipped with its tube rings and 300mm Losmandy-style dovetail plate. This substantial build requires a high-capacity mount but rewards you with a rigid imaging platform. The heavy-duty 3.4-inch rack-and-pinion focuser provides precise, no-slip control over focus, even with heavy camera payloads, and includes a 360° rotator for effortless image framing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescopic Dew Shield:\u003c\/strong\u003e Contracts the OTA length to 930.3mm for transport and extends to 1117.8mm to block stray light and prevent dew formation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC-Machined Tube:\u003c\/strong\u003e The entire optical tube is built for rigidity and thermal stability, ensuring focus remains consistent throughout an imaging session.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder Base:\u003c\/strong\u003e A standard finder shoe is included for attaching your preferred guide scope or finder.\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\u003eComplete Mounting \u0026amp; Connection System: 300mm Plate and 4 Adapters\u003c\/h3\u003e\n\u003cp\u003eThe 151PHQ arrives ready to integrate into your setup. It includes a pair of robust tube rings, a multi-function carrying handle, and a 300mm Losmandy-style dovetail plate for secure attachment to your mount. To connect your camera, a set of four threaded adapters is provided, stepping down from the focuser's native M86x1 thread to the universal M48x0.75 thread used by most cameras and filter wheels.\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\u003eAskar 151PHQ vs. 130PHQ: Aperture and Portability\u003c\/h3\u003e\n\u003cp\u003eAs the largest instrument in Askar's PHQ line, the 151PHQ is the direct successor to the popular 130PHQ for imagers seeking more resolving power and light grasp.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 130PHQ Advantage:\u003c\/strong\u003e The 130PHQ is significantly lighter and more compact. Its lower weight makes it compatible with a wider range of medium-payload mounts, offering greater portability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 151PHQ Advantage:\u003c\/strong\u003e With a 151mm objective, the 151PHQ gathers 34% more light than the 130mm model, allowing you to capture fainter details or reduce exposure times. Its longer 1057mm focal length also provides greater image scale, making it better suited for resolving details in smaller galaxies and 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\"\u003eDoes the Askar 151PHQ require a separate field flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Askar 151PHQ has a \u003cstrong\u003ebuilt-in flattener\u003c\/strong\u003e as part of its quadruplet optical design. It produces a flat 60mm image circle natively, so you do not need to purchase or calculate backfocus for an external flattener.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of astronomical mount is needed for the Askar 151PHQ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a total weight of \u003cstrong\u003e13.7kg (30.2 lbs)\u003c\/strong\u003e plus the weight of your camera and guide scope, a heavy-duty mount is essential. Look for mounts with an instrumental capacity of at least 50-60 lbs (22-27 kg) to ensure stable, precise tracking for long-exposure astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar 151PHQ frame large targets like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1057mm focal length\u003c\/strong\u003e provides an ideal image scale for large galaxies and nebulae when paired with a full-frame sensor. On a typical full-frame camera, M31 will be tightly framed, showcasing its core, dust lanes, and outer arms in a single, high-resolution shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 60mm image circle of the 151PHQ mean for my camera choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe large \u003cstrong\u003e60mm image circle\u003c\/strong\u003e fully illuminates sensors up to medium format size without vignetting. This makes the 151PHQ compatible with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-Frame (36x24mm) DSLR\/Mirrorless and Astro Cameras:\u003c\/strong\u003e These will be fully covered with excellent corner-to-corner star quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-Format (e.g., 55mm diagonal) Astro Cameras:\u003c\/strong\u003e Even the largest consumer sensors will be illuminated, allowing you to capture immense fields of view.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 151PHQ's 1057mm focal length good for smaller galaxies like the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e1057mm focal length\u003c\/strong\u003e provides excellent image scale for resolving details in medium-to-small deep-sky objects. With the 151mm aperture, you can capture the spiral structure of M51, the bridge connecting it to its companion galaxy NGC 5195, and individual HII regions with impressive clarity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the quadruplet design in the Askar 151PHQ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe four-element (quadruplet) design with \u003cstrong\u003etwo ED glass elements\u003c\/strong\u003e allows for a higher degree of optical correction than simpler doublet or triplet designs. It corrects for chromatic aberration (color fringing), spherical aberration, and field curvature simultaneously, resulting in a sharp, flat, color-pure image across the entire 60mm field without needing extra accessories.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e151mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1057mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Design\u003c\/td\u003e\n\u003ctd\u003eQuadruplet Air-Spaced APO (with 2 ED elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e11.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e13.7 kg (including tube rings \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Observing)\u003c\/td\u003e\n\u003ctd\u003e930.3mm (dew shield contracted) to 1117.8mm (dew shield stretched)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Imaging)\u003c\/td\u003e\n\u003ctd\u003e976.8mm (dew shield contracted) to 1164.3mm (dew shield stretched)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Adapters\u003c\/td\u003e\n\u003ctd\u003eM86×1 to M68×1\u003cbr\u003eM68×1 to M54×0.75\u003cbr\u003eM54×0.75 to M54×0.75\u003cbr\u003eM54×0.75 to M48×0.75 (with M48 filter 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\"\u003e151PHQ OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eCarrying Handle\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\"\u003eAskar Losmandy 300mm Dovetail Plate\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\"\u003e4-Piece Photographic Adapter Set\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\"\u003eAluminum Hard Case\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_151PHQ_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\"\u003eDownload 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\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\/Askar_151PHQ_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851326157085,"sku":"ASK-151PHQ","price":6299.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-151PHQ-1_a71134c0-c394-423b-9744-ec15cd536a28.jpg?v=1788401651"},{"product_id":"askar-203apo","title":"Askar 203APO f\/7 Triplet APO Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e203mm Aperture Triplet Air-Spaced APO Objective\u003c\/li\u003e\n\u003cli\u003e1421mm Focal Length at f\/7\u003c\/li\u003e\n\u003cli\u003eIncludes one ED (Extra-Low Dispersion) Glass Element\u003c\/li\u003e\n\u003cli\u003eRetractable Tube Design for a 1145mm Minimum Length\u003c\/li\u003e\n\u003cli\u003e23.5kg Gross Weight with Included Rings and Plate\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\u003eAskar 203APO f\/7 Triplet APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Askar 203APO refractor combines a massive 203mm aperture with a 1421mm focal length, delivering a native f\/7 focal ratio for high-resolution planetary and deep-sky imaging. Its triplet air-spaced APO objective, which includes one ED glass element, is housed in an optical tube that weighs 18.5kg and has a transport length of just 1145mm thanks to its retractable design.\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\u003e203mm f\/7 Triplet APO: Correcting Color with ED Glass\u003c\/h3\u003e\n\u003cp\u003eThe heart of the 203APO is its 203mm triplet air-spaced apochromatic objective. By incorporating a piece of specialized ED (Extra-low Dispersion) glass, the optical system corrects for chromatic aberration, ensuring that stars are sharp, color-pure points of light without distracting purple fringing. This high level of color correction is critical for an instrument with this much light-gathering power, providing true-to-life colors and maximum contrast on everything from lunar craters to faint galactic dust lanes.\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 1145mm Transport Length: Retractable Tube for Portability \u0026amp; Binoviewers\u003c\/h3\u003e\n\u003cp\u003eDespite its large aperture, the Askar 203APO is designed for field use. A retractable dew shield allows the OTA to shrink to a transport length of 1145mm. More significantly, the rear lens tube itself is retractable, a key feature for enabling different observing setups. By contracting the rear assembly, you gain enough inward focus travel to use binoviewers without a Barlow lens, while extending it provides the correct focal point for standard 2\" diagonals and eyepieces.\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\u003eFocuser System with 2\" and 1.25\" Adapters\u003c\/h3\u003e\n\u003cp\u003eThe 203APO is equipped with a large-diameter, dual-speed rack and pinion focuser built to handle the weight of heavy imaging trains without flexure or slippage. The entire focuser assembly rotates a full 360°, allowing you to perfectly frame your target without rotating the entire optical tube. For maximum flexibility, the focuser includes two finder bases and comes standard with both 2\" and 1.25\" adapters, ensuring compatibility with all your visual and imaging accessories.\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\u003e23.5kg Mounting System: Triplet Rings and a Losmandy Plate\u003c\/h3\u003e\n\u003cp\u003eSupporting the 18.5kg optical tube is a robust set of hardware that brings the total weight to 23.5kg. The system includes a unique set of triplet-style tube rings, providing exceptional stability and rigidity. These rings attach to a standard Losmandy-style dovetail plate, which is compatible with most high-capacity equatorial mounts. A long handle is mounted on top of the rings, which not only makes transport easier but also serves as an additional mounting point for guide scopes or other accessories.\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\u003eAskar 203APO vs. 185APO: The Light-Gathering Advantage of 203mm\u003c\/h3\u003e\n\u003cp\u003eWhile the Askar 185APO offers excellent imaging in a more portable package, the 203APO represents a significant step up in optical power. The primary trade-off is weight; at 23.5kg, the 203APO demands a higher-capacity mount than its smaller sibling.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 185APO Advantage:\u003c\/strong\u003e Lighter weight and smaller physical size make it easier to transport and mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 203APO Advantage:\u003c\/strong\u003e The larger 203mm aperture gathers substantially more light, resulting in brighter images, shorter exposure times for faint deep-sky objects, and a higher theoretical resolution for splitting close double stars and resolving fine planetary detail.\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 Askar 203APO's retractable rear tube help with binoviewers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBinoviewers require a large amount of inward focus travel that most refractors do not have. The \u003cstrong\u003eAskar 203APO's\u003c\/strong\u003e retractable rear tube solves this by allowing you to shorten the optical path. By contracting the tube, you can achieve focus with a binoviewer directly, without needing a Barlow or optical corrector that would increase magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Askar 203APO's 23.5kg weight?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a gross weight of \u003cstrong\u003e23.5kg\u003c\/strong\u003e (51.8 lbs) for the OTA, rings, and plate, a heavy-duty equatorial mount is essential. For reliable imaging, you should look for a mount with a manufacturer-rated payload capacity of at least 70 lbs (32kg), and preferably in the 100 lb (45kg) class to ensure stability and precise tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar 203APO suitable for high-resolution planetary imaging of Jupiter or Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The large \u003cstrong\u003e203mm\u003c\/strong\u003e aperture provides exceptional resolving power, while the f\/7 focal ratio is a good starting point for planetary imaging. When combined with a 2.5x or 3x Barlow lens, the \u003cstrong\u003eAskar 203APO\u003c\/strong\u003e can achieve the long effective focal lengths needed to capture fine details like the Cassini Division in Saturn's rings or cloud bands on Jupiter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the benefits of the 203mm f\/7 triplet APO design for deep-sky objects like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e203mm\u003c\/strong\u003e triplet APO design offers two main advantages for targets like the Orion Nebula (M42). First, the large aperture gathers a tremendous amount of light, revealing fainter, extended nebulosity in shorter exposures. Second, the apochromatic correction ensures that the bright stars of the Trapezium cluster at its core are rendered as sharp, color-pure points without chromatic aberration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the Askar 203APO come with a long Losmandy dovetail plate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA long telescope like the \u003cstrong\u003eAskar 203APO\u003c\/strong\u003e requires careful balancing on an equatorial mount, especially when adding heavy cameras, filter wheels, and guide scopes. The included long Losmandy plate provides a wide range of adjustment, making it much easier to slide the entire \u003cstrong\u003e23.5kg\u003c\/strong\u003e assembly forward or backward to achieve perfect balance in Right Ascension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 2-inch and 1.25-inch accessories with the Askar 203APO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003eAskar 203APO\u003c\/strong\u003e is equipped with a large-diameter focuser that terminates in a standard 2\" opening. It also includes a \u003cstrong\u003e2\"\/1.25\" adapter\u003c\/strong\u003e, ensuring full compatibility with all standard eyepieces, diagonals, Barlow lenses, and camera nosepieces on the market.\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\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e203mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1421mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eTriplet air-spaced APO (including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e1145mm (dew shield contracted) \/ 1335mm (dew shield stretched)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e18.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e23.5kg (including tube rings and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapters\u003c\/td\u003e\n\u003ctd\u003e2\" and 1.25\" visual adapters\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\"\u003e203APO OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 group\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\"\u003eHandle\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\"\u003eAskar 500mm Losmandy Dovetail Plate\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\"\u003eAluminum Box\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_203APO_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\"\u003eDownload 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\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\/Askar_203APO_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851329204509,"sku":"ASK-203APO","price":12011.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-203APO-1_b026fdf7-2ccd-4381-8223-4faa58c07ff7.jpg?v=1788401660"},{"product_id":"askar-60f","title":"Askar 60F Flat-Field Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e60mm Aperture Quadruplet APO Optics\u003c\/li\u003e\n\u003cli\u003e408mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/6.8 Native Focal Ratio\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eIntegrated Field Flattener\u003c\/li\u003e\n\u003cli\u003e2.86kg Gross Weight\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\u003eAskar 60F Flat-Field Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar 60F Flat-Field astrograph delivers full-frame imaging capability in a compact package, integrating a 60mm quadruplet APO objective with a 408mm focal length. Its native f\/6.8 optical design features a built-in flattener that produces a corrected 44mm image circle, eliminating the need for separate corrective optics and complex back-focus calculations.\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\u003eQuadruplet APO Optics: A Flat 44mm Image Circle at f\/6.8\u003c\/h3\u003e\n\u003cp\u003eThe core of the Askar 60F is its quadruplet air-spaced APO objective, which includes one ED glass element to ensure high-contrast images with minimal chromatic aberration. Unlike standard doublets or triplets that require a separate flattener, the 60F's integrated rear element corrects field curvature natively across a full 44mm image circle. This design simplifies your imaging train, allowing you to attach a full-frame camera, focus, and begin capturing sharp, pinpoint stars 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\u003ePortable Astrograph Design: 2.86kg Grab-and-Go System\u003c\/h3\u003e\n\u003cp\u003eEngineered for portability, the Askar 60F weighs just 2.86kg fully equipped with its included tube rings, handle, and 230mm Vixen dovetail plate. With a contracted length of only 289mm, it fits easily into carry-on luggage and pairs perfectly with lightweight tracking mounts. This makes it an ideal instrument for traveling to dark-sky sites or for quick setup in 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\u003eReady-to-Image: Integrated Adapters and 50mm Focuser\u003c\/h3\u003e\n\u003cp\u003eThe Askar 60F arrives ready for astrophotography with a complete set of photographic adapters. The robust focuser provides 50mm of precise travel and terminates in a standard M64x0.75 thread. Included adapters step this down to M54 and M48, allowing direct connection to most dedicated astronomy cameras and DSLRs. The M48 adapter also features an internal thread for mounting standard 2\" filters, keeping your imaging train as short and rigid as possible.\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\u003eAskar 60F vs. William Optics RedCat 61: Focal Length and Simplicity\u003c\/h3\u003e\n\u003cp\u003eWhen choosing a compact astrograph, a common comparison is the William Optics RedCat 61. The RedCat's f\/4.9 Petzval design is significantly faster, allowing for shorter sub-exposure times. However, the Askar 60F offers a distinct advantage with its longer 408mm focal length compared to the RedCat's 300mm, providing more image scale to better resolve details in smaller deep-sky objects or galaxy groups. For imagers seeking a straightforward, flat-field system with greater reach, the Askar 60F is the more targeted choice.\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\"\u003eDo I need a separate field flattener for the Askar 60F?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Askar 60F has a \u003cstrong\u003ebuilt-in field flattener\u003c\/strong\u003e as part of its quadruplet optical design. It is engineered to deliver a flat field across a 44mm image circle, covering full-frame sensors without any additional corrective optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Askar 60F frame the North American Nebula (NGC 7000) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 408mm focal length paired with a full-frame sensor provides a field of view that is ideal for capturing the entire North American Nebula (NGC 7000) and the adjacent Pelican Nebula (IC 5070) in a single, well-composed frame. The 44mm corrected image circle ensures stars will remain sharp across the entire image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar 60F suitable for a portable mount like the Sky-Watcher Star Adventurer GTi?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. With a fully-equipped weight of just \u003cstrong\u003e2.86kg\u003c\/strong\u003e, the Askar 60F is an excellent match for compact GoTo equatorial mounts. This combination creates a powerful and highly portable grab-and-go imaging system capable of capturing high-quality deep-sky images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapters are needed to connect a ZWO camera to the Askar 60F?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 60F includes a set of adapters, one of which is an \u003cstrong\u003eM48×0.75 adapter\u003c\/strong\u003e. This is the standard thread for most dedicated astronomy cameras, including those from ZWO. You can typically connect your camera directly to this adapter without needing to purchase anything additional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 60F for visual astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While it is optically optimized for astrophotography, you can use the Askar 60F for visual observation by attaching a standard 1.25\" or 2\" diagonal and eyepiece. Its 408mm focal length makes it a superb instrument for wide-field sweeping of the Milky Way and observing large open star clusters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the Askar 60F's f\/6.8 focal ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe f\/6.8 focal ratio offers an excellent balance between light-gathering speed and optical precision. It is fast enough for deep-sky imaging without being overly demanding on mount tracking accuracy. This moderate ratio also helps ensure excellent color correction and sharp star performance across the entire 44mm image circle.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e408mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuadruplet air-spaced APO (with one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Contracted)\u003c\/td\u003e\n\u003ctd\u003e289mm (with 1.25\" adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Stretched)\u003c\/td\u003e\n\u003ctd\u003e369mm (with photo adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (OTA only)\u003c\/td\u003e\n\u003ctd\u003e2.36kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (with rings \u0026amp; plate)\u003c\/td\u003e\n\u003ctd\u003e2.86kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-End Adapters\u003c\/td\u003e\n\u003ctd\u003eM64×0.75 to M54, M54 to M54, M54 to M48 (with 2\" filter 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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_60F_Flat-Field_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAskar 60F OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eCarry Handle\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\"\u003e230mm Vixen Dovetail Plate\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\"\u003ePhotographic Adapter Set\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\/Askar_60F_Flat-Field_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851329466653,"sku":"ASK-ASAPO60F","price":699.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-60F-Flat-Field-1_1ba61c52-0d61-4c47-a32a-9a79b28bf7c4.jpg?v=1788401669"},{"product_id":"askar-91f","title":"Askar 91F Flat-Field Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e91mm Aperture Quadruplet APO Optics\u003c\/li\u003e\n\u003cli\u003e609mm Focal Length at f\/6.7\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003eIntegrated Field Flattener Design\u003c\/li\u003e\n\u003cli\u003e3.92kg Net Weight\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\u003eAskar 91F Flat-Field Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar 91F astrograph integrates a 91mm aperture with a 609mm focal length for a native f\/6.7 optical system. Its quadruplet APO objective, which includes one ED glass element, delivers a flat, color-corrected 44mm image circle that illuminates full-frame sensors without an external flattener. The entire optical tube weighs only 3.92kg, creating a portable yet powerful imaging instrument.\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 91mm f\/6.7 Quadruplet APO with a 44mm Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe core of the Askar 91F is its self-flattened optical design. Unlike traditional refractors that require a separate, carefully spaced field flattener, this quadruplet system has the correction built in. This eliminates the need to calculate back focus or purchase additional accessories, allowing you to connect your camera and start imaging immediately after achieving focus.\u003c\/p\u003e\n\u003cp\u003eThe 44mm image circle is specifically designed to cover full-frame CMOS and DSLR sensors, ensuring sharp, pinpoint stars from the center to the corners of your frame. The inclusion of one ED (Extra-low Dispersion) glass element in the air-spaced objective effectively suppresses chromatic aberration, resulting in high-contrast images with true-to-life color rendition, free of distracting purple fringing around bright stars.\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\u003e3-inch Rack-and-Pinion Focuser with 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eTo support heavy full-frame cameras and filter wheels without flexure, the Askar 91F is equipped with a rigid 3-inch dual-speed rack-and-pinion focuser. The 1:10 fine adjustment knob allows for critical focus, while the 30mm of focuser travel accommodates a wide range of accessories. A 360° rotator at the rear of the focuser lets you frame your target perfectly without rotating the entire optical tube.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Adapters:\u003c\/strong\u003e The package comes with a set of photographic adapters, including M54x0.75 and M48x0.75 connections, ensuring compatibility with most popular astronomy cameras and T-rings. The M48 adapter also includes a thread for 2-inch filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual Versatility:\u003c\/strong\u003e For visual use, the scope includes standard 2-inch and 1.25-inch adapters, making it a capable instrument for observing star clusters and nebulae, not just for imaging them.\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\u003eA 3.92kg Lightweight Design with Dual Finder Bases\u003c\/h3\u003e\n\u003cp\u003eEngineered for portability, the Askar 91F's main tube weighs just 3.92kg (4.52kg with rings and plate), making it an excellent match for mid-sized equatorial mounts. The retractable dew shield reduces the telescope's length to as little as 513mm for transport and storage. Thoughtful mechanical details enhance usability in the field.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Finder Mounts:\u003c\/strong\u003e Two finder bases are mounted on either side of the focuser, providing flexible mounting options for a guide scope and a finder scope simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e The included 230mm Vixen-style dovetail plate provides a secure connection to your mount and features 1\/4\" and 3\/8\" screw holes for direct attachment to a photo tripod for terrestrial viewing.\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\u003eAskar 91F vs. Triplet APOs: The Advantage of an Integrated Flattener\u003c\/h3\u003e\n\u003cp\u003eWhen comparing the Askar 91F to a traditional triplet apochromat like the William Optics FLT 91, the primary distinction is the optical design philosophy. While both deliver excellent color correction, the triplet design requires an additional, separately purchased field flattener to achieve a flat field for astrophotography.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplicity and Cost:\u003c\/strong\u003e The Askar 91F's integrated flattener means there's no complex back-focus spacing to calculate and no extra accessory to buy. This simplifies the imaging train and reduces overall cost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Correction:\u003c\/strong\u003e Because the flattener is part of the objective design, the optical correction is perfectly matched to the telescope, eliminating potential issues with third-party flatteners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-offs:\u003c\/strong\u003e A triplet with a separate flattener\/reducer can offer multiple focal ratios. The Askar 91F is optimized for its native 609mm focal length, prioritizing out-of-the-box imaging readiness over focal length flexibility.\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 main benefit of the Askar 91F's quadruplet design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is its \u003cstrong\u003eself-flattened optical system\u003c\/strong\u003e. Unlike standard refractors that require a separate accessory, the Askar 91F has the field flattener built into its quadruplet objective. This ensures a perfectly flat 44mm image circle for full-frame cameras without the need to calculate back focus or buy extra components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to calculate back focus for the Askar 91F?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The integrated flattener design means you do not need to calculate back focus. Simply attach your camera using the provided adapters, bring the telescope into focus using the focuser, and you are ready to image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar 91F perform on full-frame cameras like a Sony A7 series?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 91F is designed specifically for full-frame cameras. Its \u003cstrong\u003e44mm corrected image circle\u003c\/strong\u003e fully illuminates the sensor of a Sony A7, Canon R, or Nikon Z series camera, providing pinpoint stars across the entire frame without vignetting or distorted stars in the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the 4.52kg Askar 91F OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a fully loaded weight of 4.52kg (including rings and dovetail plate), the Askar 91F is well-suited for mid-sized equatorial mounts with a payload capacity of 25-30 lbs (11-14 kg) or more. Mounts like the Sky-Watcher HEQ5 or iOptron CEM26\/GEM28 can carry this telescope and associated imaging gear with excellent stability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 91F for visual observation of planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While optimized for astrophotography, its high-quality APO optics make it a very capable visual instrument. At 609mm, it provides medium power for observing Jupiter's moons and cloud bands or Saturn's rings. You would simply use the included 1.25\" or 2\" adapter with your choice of eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the different adapter threads on the Askar 91F connect to?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 91F includes a set of adapters to connect various devices. The primary connection types are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM64×1:\u003c\/strong\u003e The thread on the focuser drawtube itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54×0.75:\u003c\/strong\u003e A common thread size for many larger-format astronomy cameras and filter wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48×0.75:\u003c\/strong\u003e The standard thread for 2\" filters and the most common connection for full-frame camera T-rings.\u003c\/li\u003e\n\u003c\/ul\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e91mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e609mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuadruplet air-spaced APO (including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3-inch dual-speed Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (OTA only)\u003c\/td\u003e\n\u003ctd\u003e3.92 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (w\/ rings \u0026amp; plate)\u003c\/td\u003e\n\u003ctd\u003e4.52 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Visual Config)\u003c\/td\u003e\n\u003ctd\u003e513mm (retracted) \/ 599mm (extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Photo Config)\u003c\/td\u003e\n\u003ctd\u003e550mm (retracted) \/ 636mm (extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-end Adapters\u003c\/td\u003e\n\u003ctd\u003eM64x1, M54x0.75, M48x0.75 (with 2\" filter 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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_91F_Flat-Field_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAskar 91F OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eCarry Handle\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\"\u003e230mm Vixen Dovetail Plate\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\"\u003ePhotographic Adapter Set\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\/Askar_91F_Flat-Field_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851329925405,"sku":"ASK-ASAPO91F","price":1399.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-91F-Flat-Field-1_23348316-55b6-4015-90af-dd56471b084f.jpg?v=1788401678"},{"product_id":"askar-131f","title":"Askar 131F Flat-Field APO Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e131mm Aperture\u003c\/li\u003e\n\u003cli\u003ef\/7.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eQuadruplet Air-Spaced APO Optical Design\u003c\/li\u003e\n\u003cli\u003eIncludes one ED Glass Element\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eIntegrated Field Flattener\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\u003eAskar 131F Flat-Field APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Askar 131F Flat-Field refractor combines a 131mm aperture with a 983mm focal length in a native f\/7.5 optical system designed for serious astrophotography. Its quadruplet air-spaced APO objective, which includes one ED glass element, delivers a flat, color-corrected 44mm image circle without the need for an external flattener. With a gross weight of 9.4kg including rings and dovetail plate, this telescope integrates optical correction directly into the design, simplifying your imaging train.\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\u003e131mm f\/7.5 Quadruplet APO: Color-Free, Flat-Field Imaging\u003c\/h3\u003e\n\u003cp\u003eThe core of the 131F is its advanced quadruplet objective lens. This design uses four air-spaced elements, including one ED (Extra-low Dispersion) glass element, to aggressively suppress chromatic aberration. Unlike standard doublets or triplets, this configuration corrects for color fringing and field curvature across the 44mm image circle, producing pinpoint stars on a dark background without requiring additional corrective optics.\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\u003e44mm Image Circle: Full-Frame Ready, No Flattener Required\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of the Askar 131F is its \"self-flattening\" optical system. This eliminates the most common point of failure and complexity in imaging setups: calculating and achieving the correct back focus for a separate flattener. The 44mm image circle fully illuminates full-frame sensors, and with the included M48 and M54 adapters, you can directly attach your camera, focus, and begin imaging immediately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Additional Purchases:\u003c\/strong\u003e The integrated flattener means you save the cost and weight of a separate optical corrector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero Back Focus Calculation:\u003c\/strong\u003e Simply attach your camera via the appropriate adapter and use the 30mm of focuser travel to achieve a sharp, flat field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Integration:\u003c\/strong\u003e The M54 to M48 adapter includes standard M48x0.75 filter threads, allowing you to easily add 2-inch filters to your imaging train.\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\u003e9.4kg Gross Weight: Robust Mechanics and 30mm Focuser Travel\u003c\/h3\u003e\n\u003cp\u003eEngineered for stability, the Askar 131F weighs 9.4kg when fully assembled with its included tube rings, handle, and 300mm Losmandy-style dovetail plate. The OTA itself has a net weight of 7.9kg and a variable length from 878mm to 1026mm depending on the adapter used and dew shield position. High-quality CNC machining ensures precise alignment, while the robust focuser provides 30mm of travel for fine-tuning focus with a variety of cameras.\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\u003eAskar 131F vs. Triplet APOs: The Integrated Flattener Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile many high-end refractors use a triplet objective, they almost always require an additional field flattener or reducer\/flattener for astrophotography. This introduces complexity, potential tilt, and critical back focus spacing requirements that must be met with precision spacers.\u003c\/p\u003e\n\u003cp\u003eThe Askar 131F's quadruplet design incorporates that correction into the main optical tube. This provides a significant advantage: you get a guaranteed flat field optimized for the telescope's native 983mm focal length without any extra components or calculations. While a triplet with a separate flattener might offer more flexibility with reducers, the 131F delivers perfect out-of-the-box performance for full-frame imaging at its designed focal ratio.\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 Askar 131F's self-flattening design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is simplicity and reliability. You do not need to purchase a separate field flattener or calculate the precise 55mm (or other) back focus distance. The Askar 131F's quadruplet optics deliver a flat 44mm image circle right out of the box, eliminating a major source of frustration in astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size camera sensors will the Askar 131F's 44mm image circle cover?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 44mm image circle is large enough to fully illuminate \u003cstrong\u003efull-frame sensors\u003c\/strong\u003e (typically 43.3mm diagonal) found in cameras like the ZWO ASI6200 or Sony A7 series. It will also easily cover smaller APS-C and Micro Four Thirds sensors with no vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar 131F perform on large deep-sky objects like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 983mm focal length provides excellent image scale for resolving detail in medium-to-large targets. When paired with a full-frame camera, the Askar 131F can frame the entirety of the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000), capturing these expansive objects with sharp stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required for the Askar 131F's 9.4kg weight?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor imaging, a mount with a payload capacity of at least 40-50 lbs (18-22 kg) is recommended. The total weight of the Askar 131F is 9.4kg (about 20.7 lbs), and you must also account for your camera, guide scope, and other accessories. A mount like the Sky-Watcher EQ6-R Pro or Celestron CGX would be a suitable choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch filters with the Askar 131F?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The included photographic adapter set contains an M54-to-M48 adapter that is threaded to accept standard \u003cstrong\u003eM48x0.75 (2-inch) filters\u003c\/strong\u003e. This allows you to easily incorporate narrowband or light pollution filters into your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Askar 131F need a separate dew heater?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLike all refractors, the objective lens is exposed to the night air and can collect dew. While the extendable dew shield (which increases the total length to 963mm or 1026mm) helps, using a dedicated dew heater strip around the objective is highly recommended for all-night imaging sessions, especially in humid conditions.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e131mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e983mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuadruplet air-spaced APO (including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (OTA only)\u003c\/td\u003e\n\u003ctd\u003e7.9kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (with rings \u0026amp; plate)\u003c\/td\u003e\n\u003ctd\u003e9.4kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Contracted)\u003c\/td\u003e\n\u003ctd\u003e878mm (with 1.25\" adapter) \/ 941mm (with photo adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Stretched)\u003c\/td\u003e\n\u003ctd\u003e963mm (with 1.25\" adapter) \/ 1026mm (with photo adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-End Adapters\u003c\/td\u003e\n\u003ctd\u003eM78×1 to M54×0.75, M54×0.75 to M54×0.75, M54×0.75 to M48×0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thread\u003c\/td\u003e\n\u003ctd\u003eM48×0.75 (on M54-M48 adapter)\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_131F_Flat-Field_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e131F OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eHandle\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\"\u003e300mm Losmandy Dovetail Plate\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\"\u003ePhotographic Adapter Set\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\/Askar_131F_Flat-Field_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851331236125,"sku":"ASK-ASAPO131F","price":2799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-131F-Flat-Field-1_466f55e4-2cbf-413b-ab14-1372829037b5.jpg?v=1788401697"},{"product_id":"askar-111f-flat-field-astrograph","title":"Askar 111F Flat-Field Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e111mm Aperture Quadruplet APO Optics\u003c\/li\u003e\n\u003cli\u003e766mm Focal Length at f\/6.9\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Corrected Image Circle\u003c\/li\u003e\n\u003cli\u003eIntegrated Field Flattener Design\u003c\/li\u003e\n\u003cli\u003e5.74kg Net Weight\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\u003eAskar 111F Flat-Field Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar 111F astrograph integrates a 111mm aperture with a 766mm focal length for a native f\/6.9 optical system. Its quadruplet APO objective, which includes one ED glass element, delivers a flat, color-corrected 44mm image circle that illuminates full-frame sensors without an external flattener. The optical tube weighs 5.74kg, pairing serious light-gathering with true out-of-the-box imaging readiness.\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 111mm f\/6.9 Quadruplet APO with a 44mm Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe core of the Askar 111F is its self-flattened optical design. Unlike traditional refractors that require a separate, carefully spaced field flattener, this quadruplet system — three elements in the front group and one in the rear — has the correction built in. This eliminates the need to calculate back focus or purchase additional accessories, allowing you to connect your camera and start imaging immediately after achieving focus.\u003c\/p\u003e\n\u003cp\u003eThe 44mm image circle is specifically designed to cover full-frame CMOS and DSLR sensors, ensuring sharp, pinpoint stars from the center to the corners of your frame. The inclusion of one ED (Extra-low Dispersion) glass element in the air-spaced objective effectively suppresses chromatic aberration, while a built-in baffle inside the main tube blocks stray light for higher contrast and true-to-life color rendition, free of distracting purple fringing around bright stars.\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\u003e3-inch Rack-and-Pinion Focuser with 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eTo support heavy full-frame cameras and filter wheels without flexure, the Askar 111F is equipped with a rigid 3-inch dual-speed rack-and-pinion focuser. The 1:10 fine adjustment knob — protected by its own cap to prevent damage — allows for critical focus, while the 30mm of focuser travel accommodates a wide range of accessories. A 360° graduated rotator at the rear of the focuser lets you frame your target to a precise angle without rotating the entire optical tube.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Adapters:\u003c\/strong\u003e The package comes with a four-piece photographic adapter set, including M54x0.75 and M48x0.75 connections, ensuring compatibility with most popular astronomy cameras and T-rings. The M48 adapter also includes a thread for 2-inch filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual Versatility:\u003c\/strong\u003e For visual use, the scope includes standard 2-inch and 1.25-inch adapters, making it a capable instrument for observing star clusters and nebulae, not just for imaging them.\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\u003eA Retractable Dew Shield and Triple Finder Bases\u003c\/h3\u003e\n\u003cp\u003eThe Askar 111F's main tube weighs 5.74kg (6.76kg with rings and plate), making it a natural match for mid to large equatorial mounts. The retractable dew shield reduces the telescope's length to as little as 664mm for transport and storage, and the CNC-machined tube carries the F-series' classic blue and white finish. Thoughtful mechanical details enhance usability in the field.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree Finder Mounts:\u003c\/strong\u003e Finder bases sit on either side of the focuser, and a third slot is built into the carry handle, letting you reposition a finder or guide scope without disassembly and mount multiple accessories at once.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware:\u003c\/strong\u003e The included 300mm Vixen-style dovetail plate provides a secure connection to your mount and features 1\/4\" and 3\/8\" screw holes for direct attachment to a photo tripod for terrestrial viewing.\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\u003eAskar 111F vs. Triplet APOs: The Advantage of an Integrated Flattener\u003c\/h3\u003e\n\u003cp\u003eWhen comparing the Askar 111F to a traditional triplet apochromat like the William Optics FLT 110, the primary distinction is the optical design philosophy. While both deliver excellent color correction, the triplet design requires an additional, separately purchased field flattener to achieve a flat field for astrophotography.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplicity and Cost:\u003c\/strong\u003e The Askar 111F's integrated flattener means there's no complex back-focus spacing to calculate and no extra accessory to buy. This simplifies the imaging train and reduces overall cost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Correction:\u003c\/strong\u003e Because the flattener is part of the objective design, the optical correction is perfectly matched to the telescope, eliminating potential issues with third-party flatteners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrade-offs:\u003c\/strong\u003e A triplet with a separate flattener\/reducer can offer multiple focal ratios. The Askar 111F is optimized for its native 766mm focal length, prioritizing out-of-the-box imaging readiness — though a dedicated 111F 0.74× reducer is available separately for a wider, faster field.\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 main benefit of the Askar 111F's quadruplet design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is its \u003cstrong\u003eself-flattened optical system\u003c\/strong\u003e. Unlike standard refractors that require a separate accessory, the Askar 111F has the field flattener built into its quadruplet objective. This ensures a perfectly flat 44mm image circle for full-frame cameras without the need to calculate back focus or buy extra components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to calculate back focus for the Askar 111F?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The integrated flattener design means you do not need to calculate back focus. Simply attach your camera using the provided adapters, bring the telescope into focus using the focuser, and you are ready to image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar 111F perform on full-frame cameras like a Sony A7 series?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 111F is designed specifically for full-frame cameras. Its \u003cstrong\u003e44mm corrected image circle\u003c\/strong\u003e fully illuminates the sensor of a Sony A7, Canon R, or Nikon Z series camera, providing pinpoint stars across the entire frame without vignetting or distorted stars in the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the 6.76kg Askar 111F OTA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a fully loaded weight of 6.76kg (including rings and dovetail plate), and more once a camera, filter wheel and guide scope are added, the Askar 111F is best paired with mounts rated for roughly 30-40 lbs (14-18 kg) of imaging payload. Mounts such as the Sky-Watcher EQ6-R Pro or iOptron GEM45\/CEM40 will carry this telescope and its accessories with the stability that a 766mm focal length demands.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 111F for visual observation of planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While optimized for astrophotography, its high-quality APO optics make it a very capable visual instrument. At 766mm with 111mm of aperture, it provides ample power and light-gathering for observing Jupiter's moons and cloud bands or Saturn's rings. You would simply use the included 1.25\" or 2\" adapter with your choice of eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the different adapter threads on the Askar 111F connect to?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 111F includes a set of adapters to connect various devices. The primary connection types are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM78×1:\u003c\/strong\u003e The thread on the focuser drawtube itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54×0.75:\u003c\/strong\u003e A common thread size for many larger-format astronomy cameras and filter wheels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48×0.75:\u003c\/strong\u003e The standard thread for 2\" filters and the most common connection for full-frame camera T-rings.\u003c\/li\u003e\n\u003c\/ul\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e111mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e766mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuadruplet air-spaced APO (including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e3-inch dual-speed Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus (Imaging Mode)\u003c\/td\u003e\n\u003ctd\u003e43-73mm from M48x0.75 \/ 61-91mm from M54x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (OTA only)\u003c\/td\u003e\n\u003ctd\u003e5.74 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight (w\/ rings \u0026amp; plate)\u003c\/td\u003e\n\u003ctd\u003e6.76 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Visual Config)\u003c\/td\u003e\n\u003ctd\u003e664mm (retracted) \/ 751mm (extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length (Photo Config)\u003c\/td\u003e\n\u003ctd\u003e728mm (retracted) \/ 815mm (extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-end Adapters\u003c\/td\u003e\n\u003ctd\u003eM78x1-M54x0.75, M54x0.75-M54x0.75, M54x0.75-M48x0.75 (with 2\" filter 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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_111F_Flat-Field_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\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAskar 111F OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eCarry Handle\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\"\u003e300mm Vixen Dovetail Plate\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\"\u003ePhotographic Adapter Set\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\/Askar_111F_Flat-Field_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\"\u003eDownload 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\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851337232669,"sku":"ASK-ASKAR111F","price":2099.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-111f-Flat-Field-Astrograph_446ebebc-539c-4180-bcf7-9ac30c529e50.jpg?v=1788898954"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/askar-telescopes.oembed?page=2","provider":"David Astro","version":"1.0","type":"link"}