{"title":"Lunettes solaires H-alpha Lunt THa","description":"\u003cp\u003eLes lunettes solaires H-alpha Lunt THa sont des lunettes dédiées à l'hydrogène alpha pour observer les protubérances, les filaments et les détails de la chromosphère. La gamme va des compactes LS40THa et LS50THa, proposées en kits Standard, Enhanced et Premium PLUS, aux grandes LS152THa, LS230THa Double Stack et LS300THa réglées par pression.\u003c\/p\u003e\u003cp\u003eDes filtres et modules double-stack, des anneaux à charnière et des adaptateurs complètent la gamme pour obtenir une bande passante plus étroite et plus de contraste.\u003c\/p\u003e","products":[{"product_id":"lunt-internal-double-stack-small-format-ls80mt-ls80thapt-ls100mt","title":"Lunt Double Stack Interne Petit Format - LS80MT, LS80THaPT \u0026 LS100MT","description":"\u003c!-- more --\u003eLunt Interne Double Stack Petit Format - LS80MT, LS80THaPT \u0026amp; LS100MT","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967532593437,"sku":"LSS-DSII\/SFPTP","price":2093.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-Double-Stack-Module-LS80MT-LS100MT-1.jpg?v=1769116433"},{"product_id":"lunt-ls50tha-ha-telescope","title":"Lunt Télescope Solaire LS50THa","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eLe Lunt Solar Telescope LS50THa est un télescope dédié h-alpha (Hydrogen Alpha Wavelength) f\/7 de 50 mm.\u003c\/li\u003e\n\n \u003cli\u003eLivré avec un filtre de blocage B600\u003c\/li\u003e\n\n\u003cli\u003eUn étalon interne avec réglage de la pression permet une bande passante \u0026lt;0,75 Angstrom.\u003c\/li\u003e\n\n\u003cli\u003eLe LS50THa est livré avec une base de montage à clapet intégrée et un porte-oculaire hélicoïdal.\u003c\/li\u003e\n\n\u003cli\u003eLe télescope solaire Lunt 50 mm est parfait pour observer le Soleil, y compris les couronnes solaires, les fusées éclairantes et les éclipses.\u003c\/li\u003e\n\n\u003cli\u003ePortable et adapté aux voyages, le LS50THa est conçu pour être votre télescope solaire personnel - idéal pour les débutants en astronomie, les enfants et les adultes\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe src=\"\/\/www.youtube.com\/embed\/wG3T4K96bLE\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e Le LS50THa de Lunt Solar Systems est un télescope Hydrogen-alpha dédié de 50 mm H-alpha, non obstrué, réglé par pression, avec une bande passante de \u0026lt;0,75 A.\u003c\/p\u003e \u003cp\u003eL'excitation de voir notre étoile à travers un télescope solaire dédié est sûre de fournir de nombreuses heures de plaisir visuel et d'informations éducatives. De plus, ce package est entièrement évolutif à tout moment sans jamais avoir à retourner en usine. Par conséquent, à mesure que le Soleil devient de plus en plus actif, vous apprécierez que l'instrument puisse grandir avec lui.\u003c\/p\u003e\n\u003cp\u003e Le télescope solaire Lunt LS50THa, complet avec un accordeur de pression, fournit les éléments essentiels de base parfaits pour une première introduction à l'observation solaire. Il inclut également la technologie la plus récente pour un réglage fin, permettant la recherche fondamentale du disque solaire et de certains détails de surface.\u003c\/p\u003e\n\u003ch4\u003e Accord Doppler\u003c\/h4\u003e \u003cp\u003eLe véritable réglage Doppler (réglage de la pression) permet un déplacement vers et hors de l'utilisateur. Étonnamment, cela ajoute un composant de type 3D à l'expérience visuelle. Pendant ce temps, il a un effet minimal sur les proms car ils se trouvent au bord du disque, il a un effet sur les filaments et les régions actives à la surface. De plus, lorsqu'il regarde un filament au centre du Soleil, l'utilisateur a la possibilité d'effectuer un décalage Doppler de la base du filament vers la pointe. Par conséquent, vous pourrez suivre le filament à travers sa structure vers vous et loin de vous. Tout cela permet une capacité visuelle et d'imagerie améliorée pour l'observateur ainsi qu'un outil de recherche pour l'amateur passionné. Plus important encore, le système de réglage de la pression fournit un ordre de grandeur plus précis pour le réglage des fonctionnalités souhaitées.\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eCaractéristiques du pack LS50THa :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eUn système dédié à l'hydrogène-alpha à bande étroite.\u003c\/li\u003e\n\n \u003cli\u003eUn système basé sur un réfracteur avec un objectif frontal de 50 mm.\u003c\/li\u003e\n\n\u003cli\u003eUn Etalon interne avec un accordeur de pression permet une bande passante \u0026lt;0,75 Angstrom.\u003c\/li\u003e\n\n\u003cli\u003eLe système comprend la coquille avec des trous filetés pour le montage et des capuchons anti-poussière.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdiv data-custom-tab\u003e\n\n\u003cp data-custom-tab-title\u003eCaractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\u003cul\u003e\n\n\u003cli\u003eType : Étalon d'interférence unique\u003c\/li\u003e\n\n\u003cli\u003eRéglage : réglage de la pression interne (Doppler True Tuning)\u003c\/li\u003e\n\n\u003cli\u003eOuverture : 50 mm\u003c\/li\u003e\n\n\u003cli\u003eDistance focale : 350 mm\u003c\/li\u003e\n\n\u003cli\u003eRapport F : F7\u003c\/li\u003e\n\n\u003cli\u003ePasse-bande : \u0026lt;0,75 angströms à 656 nm\u003c\/li\u003e\n\n\u003cli\u003eMise au point : Mise au point hélicoïdale\u003c\/li\u003e\n\n\u003cli\u003eFiltre de blocage : B400 Diagonal ou B600 Diagonal (choisir dans le menu déroulant Options)\u003c\/li\u003e\n\n \u003cli\u003eMontage : Style à clapet intégré avec base taraudée 1\/4-20\u003c\/li\u003e\n\n\u003cli\u003eCouleur : blanc nacré avec des accents noirs et rouges\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Lunt Solar Systems","offers":[{"title":"B600 \/ 1.25\" R\u0026P Focuser","offer_id":51068691218717,"sku":"LSS-LS50THa\/B600R\u0026P","price":1533.0,"currency_code":"CAD","in_stock":true},{"title":"B600 \/ Helical Focuser","offer_id":44967532855581,"sku":"LSS-LS50THa\/B600PT","price":1393.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-LS50THa-Solar-Telescope-1__63228.1598295758.1280.1280.jpg?v=1684343551"},{"product_id":"lunt-50mm-double-stack-module-ls50tha","title":"Lunt Module Double Stack 50mm - LS50THa","description":"\u003c!-- more --\u003e\u003cli\u003e Le Lunt LS50C est un filtre compact à double empilement pour le télescope LS50THa\u003c\/li\u003e\n\u003cli\u003e Il abaisse la bande passante à \u0026lt;0,5 Angströms\u003c\/li\u003e\n\u003cli\u003e Se visse facilement à l'avant du LS50THa\u003c\/li\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967532921117,"sku":"LSS-LS50CP","price":1393.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LSS-LS50C.jpg?v=1770414042"},{"product_id":"lunt-ls152tha-solar-telescope-pressure-tuned","title":"Lunt Télescope Solaire LS152THa - Pressure Tuned","description":"\u003c!-- more --\u003e\n\u003cul\u003e\n\n\u003cli\u003e Télescope h-alpha dédié 152 mm f\/6 pour des résultats professionnels !\u003c\/li\u003e\n\n\u003cli\u003e L'étalon interne permet une bande passante \u0026lt;0,65 Angström.\u003c\/li\u003e\n\n\u003cli\u003e Véritable système de réglage de la pression Doppler pour des réglages de précision.\u003c\/li\u003e\n\n\u003cli\u003e Le LS152THa comprend un porte-oculaire à crémaillère et pignon de 2 pouces, un oculaire Lunt Zoom, un boîtier en aluminium, des anneaux de montage et une queue d'aronde et votre choix de filtre de blocage. \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003ciframe src=\"\/\/www.youtube.com\/embed\/_QePtqUv_kg\" width=\"560\" height=\"315\" align=\"center\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n\u003ch2\u003e Quel filtre bloquant est fait pour vous ?\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e \n\u003cstrong\u003eB1200\u003c\/strong\u003e – pour usage visuel\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eB1800\u003c\/strong\u003e – pour un champ de vision plus large et des applications d’imagerie\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eB3400\u003c\/strong\u003e – pour un champ de vision plus large et des applications d’imagerie avec des capteurs plus grands\u003c\/li\u003e\n\n\u003cli\u003e\n\n \u003cstrong\u003eAvertissement sans filtre bloquant\u003c\/strong\u003e – choisissez ce forfait uniquement si vous disposez déjà d’un filtre bloquant Lunt Solar Systems. Tous les télescopes h-alpha de Lunt Solar Systems nécessitent un filtre de blocage Lunt !\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2\u003e Télescope solaire Lunt LS152THa\u003c\/h2\u003e\n\n\u003cp\u003e Le Lunt LS152THa est actuellement le plus grand télescope solaire disponible et offrira certainement l'équilibre le plus étonnant entre résolution et performances.\u003c\/p\u003e\n\n\u003cp\u003e Le système 100 % dégagé fonctionnera au plus haut niveau à des grossissements faibles et élevés. Utilisant à la fois des revêtements avancés à contraste élevé et le nouveau système de réglage de la pression réelle Doppler, l'utilisateur pourra bénéficier d'images visuelles nettes, nettes et à fort grossissement, ainsi que d'utiliser ce système pour des processus numériques haut de gamme.\u003c\/p\u003e\n\n\u003ch2\u003e Véritable réglage Doppler\u003c\/h2\u003e\n\n \u003cp\u003eLe véritable réglage Doppler permet un déplacement vers et loin de l'utilisateur. Ajout d'un composant de type 3D à l'expérience visuelle. Bien qu’il ait un effet minime sur les proms en raison de leur emplacement au bord du disque, il a un effet sur les filaments et les régions actives de la surface.\u003c\/p\u003e\n\n\u003cp\u003e En regardant un filament au centre du Soleil, l'utilisateur a la possibilité de décaler le Doppler de la base du filament vers la pointe, en suivant le filament à travers sa structure vers vous et loin de vous, permettant ainsi une capacité visuelle et d'imagerie améliorée. pour l'observateur ainsi qu'un outil de recherche pour l'amateur passionné. Le système de réglage de la pression fournit un ordre de grandeur plus précis dans le réglage des caractéristiques souhaitées.\u003c\/p\u003e\n\n\u003cp\u003e Ce système dispose d'un module CaK optionnel et interchangeable permettant la recherche de plusieurs longueurs d'onde sur la même plate-forme. Vous pouvez également convertir le LS152THa pour une visualisation nocturne avec une plaque de support spéciale et un kit de mise au point.\u003c\/p\u003e\n\n \u003cp\u003eLe télescope solaire Lunt Solar Systems LS152THa est parfait pour les utilisateurs intermédiaires à avancés.\u003c\/p\u003e\n\n\u003ch2\u003e Caractéristiques du forfait\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Système avancé dédié à l’hydrogène-alpha à bande étroite.\u003c\/li\u003e\n\n\u003cli\u003e Un système basé sur un réfracteur avec un objectif frontal de 152 mm.\u003c\/li\u003e\n\n\u003cli\u003e Un Etalon HD interne non obstrué avec le Tuner de pression permet une bande passante \u0026lt;0,65 Angström, fournissant des détails de surface légèrement plus élevés sans perte de détail des bords.\u003c\/li\u003e\n\n\u003cli\u003e Le système comprend les anneaux de montage et la queue d'aronde, un oculaire Lunt Zoom, des capuchons anti-poussière et est livré dans un boîtier renforcé en aluminium.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cdiv data-custom-tab=\"\"\u003e\n\n\u003cp data-custom-tab-title=\"\"\u003e Caractéristiques\u003c\/p\u003e\n\n\u003cdiv\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Type : Etalon HD à interférence unique\u003c\/li\u003e\n\n\u003cli\u003e Ouverture optique : 152 mm\u003c\/li\u003e\n\n\u003cli\u003e Étalon : interne \u0026lt;0,65 Angström à 656 nm\u003c\/li\u003e\n\n\u003cli\u003e Réglage : réglage de la pression interne (réglage Doppler True)\u003c\/li\u003e\n\n\u003cli\u003e Distance focale : 900 mm\u003c\/li\u003e\n\n\u003cli\u003e Rapport F : f\/6\u003c\/li\u003e\n\n\u003cli\u003e Porte-oculaire : 2 ″ à crémaillère et pignon\u003c\/li\u003e\n\n\u003cli\u003e Filtre de blocage : B1200 Diagonal, B1800 Diagonal ou B3400 Straight-Thru (choisissez parmi les packages répertoriés ci-dessous)\u003c\/li\u003e\n\n\u003cli\u003e Couleur : Blanc nacré avec des accents noirs et rouges\u003c\/li\u003e\n\n\u003cli\u003e Rangement : étui rigide en aluminium avec mousse ajustée\u003c\/li\u003e\n\n\u003cli\u003e Poids : 30 livres\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Aucun filtre bloquant | Pas de mise au point","offer_id":44967533183261,"sku":"LSS-LS152THa\/R\u0026P","price":10989.0,"currency_code":"CAD","in_stock":true},{"title":"B1200","offer_id":44967533216029,"sku":"LSS-LS152THa\/B1200","price":11619.0,"currency_code":"CAD","in_stock":true},{"title":"B1800","offer_id":44967533248797,"sku":"LSS-LS152THa\/B1800","price":11962.0,"currency_code":"CAD","in_stock":true},{"title":"B3400","offer_id":44967533281565,"sku":"LSS-LS152THa\/B3400","price":14731.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-LS152THa-Solar-Telescope-1__42980.1598291514.1280.1280.jpg?v=1684343560"},{"product_id":"lunt-internal-double-stack-module-for-ls152tha","title":"Lunt Module Double Stack Interne pour LS152THa","description":"\u003c!-- more --\u003e\u003cli\u003e Ajoutez un module interne à double empilement à un télescope solaire Lunt LS152THa pour une bande passante abaissée de \u0026lt;0,5 Angströms !\u003c\/li\u003e\n\u003cli\u003e Le LS152THa DSII comprend un accordeur de pression pour un véritable réglage Doppler.\u003c\/li\u003e\n\u003cli\u003e Ajoutez-le vous-même à votre propre LS152THa, aucun retour à l'usine requis !\u003c\/li\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967533347101,"sku":"LSS-DSII\/LS152TP","price":4193.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"lunt-backing-plate-focuser-ls152t","title":"Lunt Porte-Oculaire et Plaque de Support - LS152T","description":"\u003c!-- more --\u003e\u003cul\u003e \u003cli\u003eLa plaque arrière et le porte-oculaire Crayford standard pour le LS152MT vous permettent de convertir ce télescope solaire dédié en un télescope pouvant être utilisé la nuit !\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cspan\u003eVous avez un LS152MT et vous souhaitez également l'utiliser pour la nuit ? Vous pouvez le faire avec cette plaque arrière et ce porte-oculaire. Cette plaque arrière spéciale et le kit de mise au point Crayford standard de 2″ vous permettront de faire exactement cela !\u003c\/span\u003e\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967533379869,"sku":"LSS-LS152T\/BP\u0026F","price":517.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Backing-Plate-Focuser__31510.1598288797.1280.1280.jpg?v=1684343563"},{"product_id":"lunt-ls230tha-double-stack-solar-telescope-pressure-tuned","title":"Lunt Télescope Solaire Double Stack LS230THa - Pressure Tuned","description":"\u003c!-- more --\u003e\u003cp\u003e \u003cstrong\u003eComprend :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eSystème à double pile LS230THa\/B3400\u003c\/li\u003e\n\n\u003cli\u003eMise au point Starlight Feather Touch\u003c\/li\u003e\n\n\u003cli\u003eDouble contrôle du système PC-USB\u003c\/li\u003e\n\n\u003cli\u003eAnneaux de tube et plaque de montage \u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eFiltre de blocage : B3400 à montage interne\u003c\/p\u003e\n\u003cp\u003e Bande passante : \u0026lt; 0,5 angströms à 656,28 nm\u003c\/p\u003e\n\u003cp\u003e Mise au point : Feather Touch\u003c\/p\u003e\n\u003cp\u003e Étalon 1 : 80 mm internes non obstrués, réglage de la pression\u003c\/p\u003e\n\u003cp\u003e Etalon 2 : 80 mm interne non obstrué, réglage de la pression\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967533412637,"sku":"LSS-LS230THa\/B3400","price":55993.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-LS230THa-Solar-Telescope-1__35689.1598291187.1280.1280.jpg?v=1684343576"},{"product_id":"lunt-ls300tha-solar-telescope-pressure-tuned","title":"Lunt Télescope Solaire LS300THa - Pressure Tuned","description":"\u003c!-- more --\u003e\u003cp\u003e Télescope H-alpha dédié 300 mm F7\u003c\/p\u003e\n\u003cp\u003e L'étalon interne non obstrué permet une bande passante \u0026lt;0,65 angström\u003c\/p\u003e\n\u003cp\u003e Le système à double empilement disponible permet une bande passante \u0026lt;0,45 angström\u003c\/p\u003e\n\u003cp\u003e Système(s) de réglage de pression True Doppler simple ou double PC-USB contrôlé par ordinateur\u003c\/p\u003e\n\u003cp\u003e Concentrateur Feathertouch de 3,5 pouces\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Pile unique","offer_id":44967533478173,"sku":"LSS-LS300THa\/B3400","price":117599.0,"currency_code":"CAD","in_stock":true},{"title":"Double pile","offer_id":44967533510941,"sku":"LSS-LS300THa\/B3400\/DSII","price":151193.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-LS300THa-Solar-Telescope-1__28151.1598290452.1280.1280.jpg?v=1684343579"},{"product_id":"lunt-case-for-ls35tha","title":"Lunt Valise de Transport pour LS35THa","description":"\u003c!-- more --\u003e\u003cp\u003e Boîtier en aluminium dur pour LS35THa ou LS35THaDX.\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967535280413,"sku":"LSS-006-011","price":168.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/AluminumCase_1024X_47888fc1-e5a7-44ae-9e3f-57f06aa79c7e.jpg?v=1748354803"},{"product_id":"lunt-clamshell-mounting-rings-ls60tha-or-ls80tha","title":"Lunt Anneaux de Montage - LS60THA ou LS80THA","description":"\u003c!-- more --\u003e\u003cul\u003e\n\n\u003cli\u003eCoque standard pour le télescope solaire Lunt LS60THa ou LS80THa.\u003c\/li\u003e\n\n \u003cli\u003eNoir anodisé avec fente pour accepter le Tele Vue Sol-Searcher Sun Finder (vendu séparément).\u003c\/li\u003e\n\n\u003cli\u003eBase taraudée 1\/4-20.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eCet anneau de montage à clapet robuste anodisé noir s'adaptera au télescope solaire LS60THa ou LS80THa. Il y a une fente en haut qui acceptera le Tele Vue Sol-Searcher Sun Finder. Le clapet a également une base taraudée 1\/4-20.\u003c\/p\u003e\n\u003cp\u003e \u003cem\u003eVeuillez noter :\u003c\/em\u003e la plupart des ensembles de télescopes solaires LS60THa et LS80THa sont livrés en standard avec ce clapet.\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":44967541244189,"sku":"LSS-CLAM","price":119.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Lunt-Clamshell-CLAM__92106.1598224448.1280.1280.jpg?v=1684343632"},{"product_id":"lunt-40mm-double-stack-solar-filter-for-ls40tha","title":"Lunt 40mm Double Stack Solar Filter for LS40THa","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDouble-stack upgrade for Lunt LS40THa telescopes\u003c\/li\u003e\n\u003cli\u003eReduces system bandpass to \u0026lt;0.29Å\u003c\/li\u003e\n\u003cli\u003e40mm clear aperture\u003c\/li\u003e\n\u003cli\u003eFront-mounted, tilt-tuned etalon\u003c\/li\u003e\n\u003cli\u003eReveals high-contrast chromospheric detail\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\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\u003eLunt 40mm Double Stack Solar Filter for LS40THa\u003c\/h2\u003e\n      \u003cp\u003eThe Lunt 40mm Double Stack Solar Filter is the definitive contrast-enhancing upgrade for your LS40THa telescope, adding a second 40mm front-mounted etalon to slash the system's final bandpass to an exceptionally narrow \u0026lt;0.29Å. By placing two precision etalons in series, this filter dramatically increases contrast on solar surface features, transforming the Sun from a flat disk into a dynamic, three-dimensional sphere.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eDouble-Stacking the LS40THa for \u0026lt;0.29Å Bandpass\u003c\/h3\u003e\n      \u003cp\u003eThis filter adds a second, perfectly matched 40mm etalon to the front of your existing LS40THa solar telescope. The two filters working in series create a combined system bandpass of less than 0.29Å — the tightest available in any Lunt double-stack configuration. Installation is simple, requiring no tools or a return to the factory, allowing you to upgrade your view in minutes.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eRevealing High-Contrast Chromospheric Detail at \u0026lt;0.29Å\u003c\/h3\u003e\n      \u003cp\u003eThe significant bandpass reduction is not just a number; it translates directly to a stark increase in visible surface detail. With the LS40FHa installed, the solar chromosphere is rendered with striking clarity. Plage boundaries sharpen into cellular networks, dark filaments reveal their multi-strand internal structure, and the delicate threading within solar prominences becomes visible from base to tip.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eStandalone H-Alpha Filtration and Critical Safety Requirements\u003c\/h3\u003e\n      \u003cp\u003eWhile designed as an upgrade for the LS40THa, the LS40FHa can also serve as a primary H-alpha filter for a compatible customer-supplied refractor. However, for safe operation in any configuration, a Lunt blocking filter is mandatory. The LS40FHa etalon alone is not a complete safety device and must be paired with an appropriate blocking filter to prevent irreversible eye damage.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install the Lunt 40mm Double Stack Filter on my LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eInstallation is straightforward and requires no tools. The LS40FHa filter simply threads onto the front objective of your existing Lunt LS40THa telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main visual benefit of double-stacking my LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary benefit is a dramatic increase in \u003cstrong\u003esurface contrast\u003c\/strong\u003e. The tighter \u0026lt;0.29Å bandpass makes features like filaments, plage, and granulation \"pop\" against the solar disk, revealing details that are subtle or invisible in a single-stack system.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lunt LS40FHa filter on a telescope other than the LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it can be used as a standalone H-alpha filter on a compatible refractor. However, you \u003cstrong\u003emust\u003c\/strong\u003e pair it with a correctly sized Lunt blocking filter for safe solar observation. The etalon by itself is not sufficient for eye safety.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs a blocking filter included with the Lunt 40mm Double Stack Filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This filter is designed as an add-on for the LS40THa telescope, which already includes a blocking filter. If you plan to use this on a different telescope, a separate Lunt blocking filter is required and must be purchased separately.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Lunt 40mm filter show more solar prominences than my single-stack LS40THa?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt will not necessarily show more prominences, as they are often bright enough to be seen in a single-stack view. However, the double-stacked view at \u0026lt;0.29Å will reveal significantly more \u003cstrong\u003einternal detail, structure, and texture\u003c\/strong\u003e within those prominences, which often appear as uniform shapes in a wider bandpass.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the LS40FHa achieve such a narrow bandpass compared to other Lunt systems?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe LS40FHa achieves its exceptionally narrow \u0026lt;0.29Å bandpass by placing two front-mounted, tilt-tuned etalons in series. This specific configuration results in a tighter combined bandpass than Lunt systems that pair a front-mounted filter with an internal, pressure-tuned etalon.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eLS40FHaP\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSystem Bandpass (Double Stacked)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.29Å\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEtalon Type\u003c\/td\u003e\n\u003ctd\u003eFront-Mount, Tilt-Tuned\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTelescope Compatibility\u003c\/td\u003e\n\u003ctd\u003eLunt LS40THa Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003e40mm Double Stack Solar Filter\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":50921462268189,"sku":"LSS-LS40FHa","price":973.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LSS-LS40FHa.png?v=1770413088"},{"product_id":"lunt-ls40tha-h-alpha-solar-telescope-standard-kit","title":"Lunt LS40THa H-Alpha Solar Telescope - Standard Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e40mm Aperture Dedicated Hydrogen-Alpha Solar Telescope\u003c\/li\u003e\n\u003cli\u003e≤0.65Å Bandpass Front-Mounted Tilt-Tuned Etalon\u003c\/li\u003e\n\u003cli\u003e6mm (B600) Blocking Filter for Visual and Imaging Use\u003c\/li\u003e\n\u003cli\u003eTele Vue Sol Searcher Solar Finder for Safe Aiming\u003c\/li\u003e\n\u003cli\u003eIncludes 12mm Eyepiece and Hard-Sided Carry Case\u003c\/li\u003e\n\u003cli\u003e400mm Focal Length (f\/10)\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\u003eManual\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\u003eEnter the Chromosphere: The Lunt LS40THa Solar Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS40THa H-Alpha Solar Telescope is a complete, dedicated instrument designed to reveal the dynamic, ever-changing chromosphere of our sun. By combining a 40mm objective with a high-contrast, tilt-tuned etalon, this telescope delivers a direct, unfiltered view of solar prominences, filaments, and surface granulation, all in the brilliant crimson light of hydrogen-alpha.\u003c\/p\u003e\n\u003cp\u003eThis is the ideal starting point for any observer curious about dedicated solar astronomy. Its grab-and-go portability makes it a perfect companion for quick daytime sessions, while its optical system is engineered to provide a level of detail that generic white-light filters simply cannot resolve. With the LS40THa, you are not just looking at the sun; you are watching the active, violent weather of a star in real time.\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 Matched 40mm f\/10 Optical System\u003c\/h3\u003e\n\u003cp\u003eThe foundation of the LS40THa is its 40mm singlet objective lens, operating at a focal ratio of f\/10. This specific focal length is engineered to provide a full-disc image of the sun with ample room around the limb. The f\/10 design ensures the light cone presented to the front etalon is nearly parallel, a critical requirement for achieving a uniform, high-contrast image across the entire field of view.\u003c\/p\u003e\n\u003cp\u003eThis aperture provides a perfect balance between resolution and sensitivity to atmospheric seeing. On days of average or poor seeing, a 40mm aperture often delivers a steadier, more pleasing view than a larger instrument, which can be over-magnified for the conditions. This makes the LS40THa a reliable performer, delivering consistent, satisfying views even when the atmosphere is turbulent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Contrast Tilt-Tuned Etalon with ≤0.65Å Bandpass\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the LS40THa is its front-mounted, tilt-tuned Fabry-Pérot etalon. This precision filter isolates a narrow slice of the solar spectrum at the 656.28nm Hydrogen-alpha line, with a full-width half-maximum (FWHM) bandpass of ≤0.65Å. This narrow bandpass is essential for rejecting the overwhelming glare of the photosphere, allowing the faint, low-contrast structures of the chromosphere to become visible.\u003c\/p\u003e\n\u003cp\u003eThe simple and robust tilt-tuning mechanism allows you to shift the filter's bandpass slightly off the central H-alpha line. This control is vital for observing features that are Doppler-shifted due to their velocity, such as solar flares or fast-moving plasma in active regions. A slight turn of the tuning wheel can make a faint filament snap into sharp relief against the solar surface.\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 B600 Blocking Filter\u003c\/h3\u003e\n\u003cp\u003eThe etalon works in concert with the B600 blocking filter, housed within the 90-degree star diagonal. The \"B600\" designation refers to its 6mm internal aperture, which is sized to pass the full solar disc from the 400mm focal length optical tube. This filter serves as the final, critical stage of the safety system, eliminating all out-of-band wavelengths and providing the observer with a purely monochromatic image.\u003c\/p\u003e\n\u003cp\u003eThe 6mm aperture of the B600 provides a generous field of view around the solar disc and is well suited for both visual observation and solar imaging. Whether you want to frame the entire sun and its surrounding prominences in a single view or capture high-resolution images of active regions and filaments, the B600 delivers a bright, high-fidelity image perfectly matched to the telescope's focal length.\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\u003eSimple and Precise Helical Focuser\u003c\/h3\u003e\n\u003cp\u003eFocusing on the sun requires small, deliberate adjustments, and the LS40THa's helical focuser is designed for this task. Unlike a rack-and-pinion focuser, a helical mechanism moves the eyepiece in and out with a simple rotation of the barrel. This design is compact, mechanically simple, and prevents any image shift during focusing.\u003c\/p\u003e\n\u003cp\u003eThe non-rotating action is a key benefit. It ensures that your eyepiece, or a camera if you are imaging, maintains its orientation as you fine-tune the focus. This makes it easier to keep your target framed and simplifies the process of achieving the sharpest possible view of delicate filamentary structures or the fine spicules at the solar limb.\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\u003eSafe and Fast Targeting with the Tele Vue Sol Searcher\u003c\/h3\u003e\n\u003cp\u003eAiming a telescope directly at the sun is inherently dangerous without a proper finder. The LS40THa includes the Tele Vue Sol Searcher for safe, precise solar acquisition. This is not an optical finder you look through; instead, it projects a small shadow or dot onto a small, white target screen, allowing you to center the sun without ever looking toward it.\u003c\/p\u003e\n\u003cp\u003eTo use it, you simply move the telescope tube until the indicator is centered on the target. This process is completely safe, intuitive, and takes only a few seconds. It eliminates any guesswork and ensures you can acquire and center the sun in the eyepiece quickly and confidently, getting you observing faster.\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\u003eMounting and Experiencing the View\u003c\/h3\u003e\n\u003cp\u003eThe included 4-inch Vixen-style dovetail bar makes the LS40THa compatible with a wide range of lightweight, portable astronomical mounts. It can be easily carried by a photo tripod with a fluid head or any entry-level equatorial or alt-azimuth mount, making it an excellent \"grab-and-go\" instrument.\u003c\/p\u003e\n\u003cp\u003eWith the included 12mm eyepiece, the telescope operates at 33x magnification. At this power, the entire solar disc is framed comfortably in the field of view. As your eye settles, you will first notice the sharp, well-defined limb. With a slight adjustment of the tilt-tuner, you will see immense prominences, appearing like ghostly red flames erupting from the edge. On the surface itself, dark, snaking filaments and bright, active regions (plage) become apparent, changing day by day.\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\u003eTrade-Offs and Upgrade Path\u003c\/h3\u003e\n\u003cp\u003eThe primary trade-off for the LS40THa's portability and price is its aperture. While 40mm provides excellent full-disc views, it has a lower resolution ceiling than larger instruments like the LS60MT or LS80MT for observing fine surface detail. Its tilt-tuned etalon is also more susceptible to off-band transmission at the edge of the field compared to Lunt's internal pressure-tuned systems, though this is rarely an issue for visual observation.\u003c\/p\u003e\n\u003cp\u003eHowever, the LS40THa offers a powerful upgrade path. By adding the LS40FHa front-mounted double-stack filter (sold separately), you can dramatically increase contrast on surface features, making the solar disc appear almost three-dimensional. This allows the telescope to grow with your interest in solar astronomy.\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\"\u003eIs the Lunt LS40THa safe to use for solar observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. It is a dedicated solar telescope with a multi-stage filtering system, including a front etalon and a rear blocking filter. It is engineered from the ground up for safe solar observation. You should never use a standard nighttime telescope with a simple front filter to view the sun.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat will I actually see with the LS40THa telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will see the sun's chromosphere in the red hydrogen-alpha wavelength. This includes solar prominences (eruptions on the edge), filaments (dark ribbons on the surface), active regions (bright areas called plage), and surface granulation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the LS40THa compare to the Lunt LS50THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS50THa has a larger 50mm aperture, which provides slightly higher resolution on surface details under good seeing conditions. The LS40THa is smaller, lighter, and more affordable, making it a better choice for portability and as an entry point into solar astronomy.\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 Lunt LS40THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS40THa is very lightweight and will perform well on a sturdy photo tripod with a fluid video head. For better tracking and slow-motion control, an astronomical mount like the Sky-Watcher AZ-GTe or a Celestron NexStar SLT is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I take pictures of the sun with this telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, solar imaging is fully supported. You can use a dedicated astronomy camera or even a smartphone with an appropriate adapter. The B600 blocking filter's 6mm aperture is well suited for both visual use and imaging, delivering a bright, high-fidelity image across the full solar disc.\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 \"double-stack\" filter upgrade?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAdding a second etalon (double-stacking) dramatically increases contrast on surface features like filaments and granulation, making them appear more detailed and pronounced. It has less effect on prominences at the limb.\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\u003eTelescope Type\u003c\/td\u003e\n\u003ctd\u003eDedicated H-Alpha Solar Telescope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEtalon\u003c\/td\u003e\n\u003ctd\u003eInternal, Tilt-Tuned\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.65 Ångström\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB600 (6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e4\" Vixen-Style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3 lbs (1.36 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eAluminum Hard Case with Custom Foam\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\"\u003eLS40THa H-Alpha Telescope\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\"\u003eB600 Blocking Filter in Diagonal\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\"\u003eHelical Focuser\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\"\u003eTele Vue Sol Searcher Solar Finder\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\" Vixen-Style Dovetail Bar\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\"\u003e12mm Solar Eyepiece\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\"\u003eHard-Sided Carry Case with Custom Foam\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:\/\/luntsolarsystems.com\/wp-content\/uploads\/2022\/01\/40mm-Universal-Manual.pdf\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 512 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" 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\"\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\u003ca rel=\"noopener\" href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":51207735148829,"sku":"LSS-LS40THa-Standard-V1","price":1393.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LS40-nofinder.png?v=1779895608"},{"product_id":"lunt-ls40tha-h-alpha-solar-telescope-enhanced-kit","title":"Lunt LS40THa H-Alpha Solar Telescope - Enhanced Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e40mm Aperture Dedicated Hydrogen-Alpha Solar Telescope\u003c\/li\u003e\n\u003cli\u003eInternal Etalon with Tilt-Tuning for \u0026lt;0.55Å Bandpass\u003c\/li\u003e\n\u003cli\u003eEnhanced Kit with Upgraded 1:1 Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eIncludes B600 Blocking Filter for a Wider Imaging Field\u003c\/li\u003e\n\u003cli\u003eIntegrated SunLock Solar Finder and Vixen-Style Dovetail\u003c\/li\u003e\n\u003cli\u003eComplete package includes a 12mm eyepiece and hard case\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\u003eWatch the Sun Come Alive: The Lunt LS40THa Solar Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS40THa H-Alpha Solar Telescope - Enhanced Kit is a complete, grab-and-go system designed to reveal the dynamic, violent nature of our nearest star. This package is built around a 40mm dedicated solar refractor that makes the sun's chromosphere visible, transforming a quiet yellow disk into a landscape of fiery prominences, active regions, and delicate filaments. The Enhanced Kit provides key upgrades over the standard package, making it the right choice for observers who want a more refined operational experience and a clear path toward solar 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\u003e40mm Aperture: Your Portable Window to the Chromosphere\u003c\/h3\u003e\n\u003cp\u003eThe LS40THa is built around a 40mm singlet objective lens with a 400mm focal length. This f\/10 system is intentionally designed for portability and performance under typical daytime seeing conditions. Atmospheric turbulence often limits the useful resolution of larger solar telescopes, allowing this compact instrument to deliver sharp, high-contrast views on days when bigger scopes struggle.\u003c\/p\u003e\n\u003cp\u003eThis aperture is ideal for observing the full solar disk in one field of view. It provides the perfect image scale to watch prominences erupt from the limb and track the evolution of active regions as they crawl across the sun's face. Its light weight means it can be mounted on any simple photo tripod or a small equatorial mount for easy tracking.\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\u003eTilt-Tuned Etalon for High-Contrast Views\u003c\/h3\u003e\n\u003cp\u003eThe heart of the LS40THa is its internal, front-mounted solid etalon. This precision filter is factory-set to a bandpass of less than 0.55 Angstroms, isolating the specific wavelength of hydrogen-alpha light. This narrow bandpass extinguishes the brilliant, overwhelming light from the photosphere, allowing the much fainter details of the chromosphere to become visible.\u003c\/p\u003e\n\u003cp\u003eTo fine-tune the filter for maximum contrast on different features, the telescope uses a simple and robust tilt-tuning mechanism. A small thumbwheel on the side of the optical tube physically tilts the etalon. This allows you to shift the filter's bandpass slightly, which causes surface features like filaments and plage to \"pop\" into view or enhances the delicate structure of prominences against the blackness of space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe B600 Blocking Filter Advantage\u003c\/h3\u003e\n\u003cp\u003eThe Enhanced Kit includes the upgraded B600 blocking filter, a critical component housed within the 90-degree star diagonal. This secondary filter provides the final, essential stage of energy rejection for safe observing. The \"600\" designation refers to its 6mm aperture, which is a significant step up from the standard B500 filter.\u003c\/p\u003e\n\u003cp\u003eThis larger clear aperture provides a wider, unvignetted field of view at the eyepiece. For visual observers, this results in a more evenly illuminated view of the full solar disk. For imagers, it is a mandatory upgrade, ensuring your camera sensor is fully illuminated edge-to-edge, preventing dimming in the corners of your solar images.\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\u003eUpgraded 1:1 Rack \u0026amp; Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eAnother key feature of the Enhanced Kit is the 1:1 rack and pinion focuser. This is a direct upgrade from the helical focuser found in the standard package, offering a more stable and precise focusing experience. The motion is smoother, making it easier to find that perfect point of sharp focus, especially at higher magnifications.\u003c\/p\u003e\n\u003cp\u003eThe rack and pinion design is also better at handling the weight of cameras and larger eyepieces without slipping or shifting. This non-rotating mechanism ensures your camera remains oriented correctly as you focus, eliminating the need to re-frame your shot after each adjustment. It is a practical upgrade that significantly improves the telescope's usability, particularly 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\u003eObserving with the LS40THa: A Live View of Solar Fury\u003c\/h3\u003e\n\u003cp\u003eWith the included 12mm eyepiece, the LS40THa operates at 33x magnification, a perfect power for framing the entire sun. After using the SunLock finder to safely center the disk, you will see a deep, ruby-red ball. As your eye adapts, the view transforms. Along the limb, you might see a hedgerow prominence, a wall of plasma arcing tens of thousands of miles into space, its structure changing over minutes.\u003c\/p\u003e\n\u003cp\u003eBy adjusting the tilt-tuner, the bright active regions on the surface darken, revealing the intricate, web-like structure of filaments snaking across the disk. One trade-off of the simple tilt-tune system is that it can create a slight brightness gradient, but this is easily managed by keeping your target of interest in the \"on-band\" sweet spot. This instrument makes observing the sun an active, engaging experience, not a passive one.\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\u003eLS40THa Kit Comparison: Finding Your Fit\u003c\/h3\u003e\n\u003cp\u003eLunt offers the LS40THa in several packages to match different observer goals. Understanding the trade-offs helps you make the right choice.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Kit:\u003c\/strong\u003e This entry-level package includes the same optics but uses a B500 blocking filter and a helical focuser. It's a capable choice for purely visual, casual solar observing where minimizing cost is the top priority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Kit (This Model):\u003c\/strong\u003e By upgrading to the B600 blocking filter and the rack \u0026amp; pinion focuser, this kit offers a better visual experience and a solid foundation for basic solar imaging. It represents the sweet spot for performance and value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium PLUS Kit:\u003c\/strong\u003e This package includes the B600 filter, R\u0026amp;P focuser, and adds an external LS40FHa double-stack etalon. Double-stacking narrows the bandpass to \u0026lt;0.29Å, dramatically increasing surface contrast and making the chromosphere's texture appear almost three-dimensional. It is the ultimate choice for dedicated solar enthusiasts who demand the highest level of 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\"\u003eWhat is the advantage of the B600 blocking filter in the Enhanced Kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe B600 blocking filter has a larger 6mm aperture compared to the standard 5mm B500. This provides a wider, more evenly illuminated field of view, which is better for imaging and for observing the full solar disk with certain eyepieces without dimming at the edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt LS40THa good for solar imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Enhanced Kit is a great starting point for solar imaging. The upgraded rack \u0026amp; pinion focuser provides smoother, more stable focusing, and the B600 blocking filter illuminates the camera sensor more effectively than the standard B500.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see sunspots with this H-alpha telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile this telescope is designed to view the chromosphere (prominences, filaments), you can see the dark umbra of very large sunspots. However, for detailed views of sunspot structure in the photosphere, a white-light solar filter on a standard nighttime telescope is the proper tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the LS40THa compare to the LS50THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS50THa has a larger 50mm aperture, which provides slightly higher resolution and a brighter image. The LS40THa is smaller, lighter, and more affordable, making it an excellent portable or entry-level option that still delivers excellent views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I upgrade this telescope to a double-stack system later?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. You can purchase the Lunt LS40FHa front-mounted etalon separately at any time. This filter threads onto the front of your LS40THa, easily converting it to a double-stack system for significantly higher-contrast views of surface detail.\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 LS40THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS40THa is very lightweight (under 4 lbs) and includes a Vixen-style dovetail. It works well on a simple alt-azimuth mount like a Vixen Porta II, a Sky-Watcher AZ-GTe, or even a sturdy photographic tripod with a fluid video head.\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\u003eTelescope Type\u003c\/td\u003e\n\u003ctd\u003eDedicated H-alpha Solar Telescope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.55 Ångström\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eTilt-Tuned Internal Etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB600 (6mm) in 90° Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e1.25\" Rack \u0026amp; Pinion Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eIntegrated SunLock Vixen-style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.8 lbs (1.7 kg)\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\"\u003eLS40THa Telescope Optical Tube\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\"\u003eB600 Blocking Filter in 1.25\" Diagonal\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\"\u003e1.25\" Rack \u0026amp; Pinion Focuser\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\"\u003eSunLock Vixen-Style Dovetail (4\")\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\"\u003eLunt 12mm Eyepiece\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\"\u003eHard 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\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:\/\/luntsolarsystems.com\/wp-content\/uploads\/2022\/07\/LS40THa_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:\/\/luntsolarsystems.com\/warranty-registration\/\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":51221379711261,"sku":"LSS-LS40THa-Enhanced","price":1533.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-LS40THa-Enhanced-Kit.jpg?v=1777426716"},{"product_id":"lunt-ls40tha-h-alpha-solar-telescope-premium-plus-kit","title":"Lunt LS40THa H-Alpha Solar Telescope - Premium PLUS Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e40mm Dedicated H-Alpha Solar Telescope\u003c\/li\u003e\n\u003cli\u003eInternal Double-Stack System with ≤0.35Å Bandpass\u003c\/li\u003e\n\u003cli\u003eB600 Blocking Filter for Full-Disk Views \u0026amp; Imaging\u003c\/li\u003e\n\u003cli\u003eIncludes Lunt 7.2mm - 21.5mm Zoom Eyepiece\u003c\/li\u003e\n\u003cli\u003e1:1 Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003eIntegrated SunLock Solar Finder\u003c\/li\u003e\n\u003cli\u003e4\" Vixen-Style Dovetail Rail\u003c\/li\u003e\n\u003cli\u003eIncludes Aluminum Hard Case with Custom Foam\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\u003eThe Ultimate View of Solar Surface Detail in a 40mm Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS40THa H-Alpha Solar Telescope - Premium PLUS Kit is a complete, dedicated system designed to reveal the sun's dynamic chromosphere with the highest contrast possible in this aperture. By including a matched double-stack etalon filter, this kit narrows the bandpass to ≤0.35Å, transforming faint surface texture and active regions into a richly detailed, three-dimensional spectacle. It is the definitive choice for the observer who prioritizes surface contrast over all else in a portable, grab-and-go package.\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\u003eMatched 40mm f\/10 Optics\u003c\/h3\u003e\n\u003cp\u003eThe foundation of the LS40THa is a 40mm f\/10 singlet objective lens, fully corrected for the 656.28nm hydrogen-alpha wavelength. This focal ratio provides a manageable 400mm focal length, creating a forgiving system for focus and tuning. The optical design ensures a high-contrast image is delivered to the etalon filtering system, a critical first step for high-resolution solar viewing.\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\u003ePrimary Tilt-Tuned Etalon Filter\u003c\/h3\u003e\n\u003cp\u003eThe heart of the telescope is its internal, front-mounted etalon. This precision filter uses a polished Fabry-Pérot cavity to isolate the light from hydrogen plasma, revealing the sun's chromosphere. The user tunes the filter to the precise H-alpha line by tilting the etalon with a simple thumbwheel, allowing you to shift the view slightly off-band to emphasize Doppler-shifted features like erupting prominences moving toward or away from you.\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\u003eLS40FHa Double-Stack Etalon for Maximum Contrast\u003c\/h3\u003e\n\u003cp\u003eThis Premium PLUS kit includes the crucial LS40FHa front-mounted double-stack etalon. Adding this second filter dramatically narrows the system's bandpass from the standard ~0.55Å to a very tight ≤0.35Å. This reduction in out-of-band light significantly increases the contrast of surface features, causing solar flares, filaments, and active region plage to stand out against the solar disk with stark definition. While a single-stack system shows you these features exist, the double-stack renders them with photographic-like texture.\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\u003eB600 Blocking Filter for Full-Disk Views\u003c\/h3\u003e\n\u003cp\u003eThe B600 blocking filter, housed in the star diagonal, is the final stage of the safety system and is sized to provide an unvignetted view of the entire solar disk with the included zoom eyepiece. This larger 6mm filter provides more clearance than the smaller B500, making it a better choice for observers who may want to try basic imaging of the full sun with a small sensor camera. It ensures the entire solar limb is visible at once, so you never miss a prominence erupting at the 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\u003eThe Experience of High-Contrast Chromosphere Viewing\u003c\/h3\u003e\n\u003cp\u003eWith the double-stack engaged and the zoom eyepiece set to around 12mm, the experience is unlike any white-light view. After tuning the etalon, the solar surface resolves into a tapestry of texture. You can trace the dark, serpentine path of a filament as it snakes across an active region, then watch as its delicate structure appears to float just above the brighter background. This is the view that turns a static star into a living, dynamic object, and the ≤0.35Å bandpass is what makes it 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\u003eUpgraded Focuser and SunLock Finder\u003c\/h3\u003e\n\u003cp\u003eThe Premium PLUS kit features an upgraded 1:1 Rack \u0026amp; Pinion focuser, which offers a smoother feel and better stability for holding cameras compared to the standard helical focuser. Finding the sun is made safe and simple by the integrated SunLock finderscope, a small pinhole that projects an image of the solar disk onto a tiny internal screen. When the dot is centered, the sun is in your eyepiece, eliminating any guesswork or unsafe alignment attempts.\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\u003eLunt Zoom Eyepiece and Hard Case\u003c\/h3\u003e\n\u003cp\u003eCompleting the kit is the Lunt 7.2mm - 21.5mm zoom eyepiece, the ideal companion for a solar telescope. It allows you to frame the entire solar disk at 21.5mm (18.6x magnification), then zoom in to 7.2mm (55.5x) to scrutinize a specific sunspot group or prominence without ever taking your eye from the view. The entire system, including the double-stack filter, packs into a custom-cut foam-lined aluminum hard case for secure transport and storage.\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 Note on Aperture and Seeing\u003c\/h3\u003e\n\u003cp\u003eWhile larger solar telescopes exist, the 40mm aperture is often an advantage under typical daytime seeing conditions. Atmospheric turbulence can easily degrade the view in larger scopes, but the LS40THa is less susceptible to these effects, frequently delivering a sharper, more stable image than a larger instrument on an average day. This makes it a highly effective and frustration-free grab-and-go solar telescope.\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 Premium PLUS (double-stack) kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Premium PLUS kit includes a second etalon filter that narrows the bandpass to ≤0.35Å. This dramatically increases the contrast of features on the sun's surface, like filaments and active regions, making them appear much more detailed and defined compared to the single-stack version.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Lunt solar telescope safe to use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Lunt LS40THa is a dedicated solar telescope with multiple, permanently installed filters. As long as it is used as designed and is not modified, it is completely safe for direct solar observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my own eyepieces with the LS40THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, you can use any standard 1.25\" eyepiece. However, non-solar-specific eyepieces may have coatings that produce reflections or glare (ghosting) when viewing the extremely bright sun. The included Lunt zoom eyepiece is optimized for this application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 40mm Lunt compare to the 50mm Lunt telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lunt LS50THa offers 25% more aperture, providing slightly higher resolution on fine surface details under good seeing conditions. The LS40THa is smaller, lighter, and often performs better under average or poor seeing, making it a more consistent and portable option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does this telescope use tilt-tuning instead of pressure-tuning?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTilt-tuning the front etalon is a simpler and more cost-effective mechanism for a telescope of this size, allowing Lunt to deliver high-quality etalon performance at an accessible price point. Lunt's larger telescopes use pressure-tuning for more uniform control over the filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I do astrophotography with the Lunt LS40THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, you can perform basic solar imaging with the LS40THa. It is suitable for capturing full-disk images or close-ups of large features using a small, lightweight planetary-style CMOS camera. Achieving focus may require a 1.25\" eyepiece extender.\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\u003e40mm\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\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003eSingle Stack: \u0026lt;0.55Å, Double Stack: ≤0.35Å\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eTilt-Tuned Etalon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB600 (6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e1:1 Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e4\" Vixen-Style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.1 lbs (1.4 kg)\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\"\u003eLS40THa 40mm H-alpha Telescope\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\"\u003eLS40FHa Double-Stack Etalon Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eB600 Blocking Filter in Diagonal\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\"\u003e1:1 Rack \u0026amp; Pinion Focuser\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\"\u003eLunt 7.2mm - 21.5mm Zoom Eyepiece\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\"\u003eIntegrated SunLock Solar Finder\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\" Vixen-Style Dovetail Rail\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 with Custom Foam\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:\/\/luntsolarsystems.com\/wp-content\/uploads\/2022\/10\/40mm_Instructions_2022.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:\/\/luntsolarsystems.com\/product-registration-and-warranty\/\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":51221379744029,"sku":"LSS-LS40THa-Premium","price":2513.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-LS40THa-Premium-PLUS-Kit.jpg?v=1777426717"},{"product_id":"lunt-ls50tha-h-alpha-solar-telescope-standard-kit","title":"Lunt LS50THa H-Alpha Solar Telescope - Standard Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 50mm\u003c\/li\u003e\n\u003cli\u003eFocal Length: 350mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio: f\/7\u003c\/li\u003e\n\u003cli\u003eBandpass: \u0026lt;0.6Å\u003c\/li\u003e\n\u003cli\u003eTuning: Internal Pressure Tuner (Doppler True Tuning)\u003c\/li\u003e\n\u003cli\u003eBlocking Filter: B400 (4mm)\u003c\/li\u003e\n\u003cli\u003eFocuser: Helical Focuser\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\u003eObserve the Sun's Dynamic Atmosphere in Hydrogen-Alpha\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS50THa is a dedicated hydrogen-alpha solar telescope designed to reveal the intricate, ever-changing details of the sun's chromosphere. This complete system combines a 50mm objective with Lunt's proprietary pressure-tuned etalon, delivering high-contrast views of prominences, filaments, and surface granulation. It offers a significant step up in resolution and tuning precision from entry-level solar filters, making it the right choice for the serious visual observer who demands performance and portability.\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\u003e50mm Objective: The Sweet Spot for Solar Viewing\u003c\/h3\u003e\n\u003cp\u003eThe 50mm precision-polished objective lens provides the ideal balance between light-gathering power and sensitivity to atmospheric seeing. Under typical daytime conditions, this aperture resolves fine details in sunspot umbra and delicate filamentary structures without being overly compromised by turbulence. The 350mm focal length (f\/7) creates a full-disc view of the sun with low-power eyepieces, while still having enough image scale for satisfying high-magnification views of active regions.\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\u003eInternal Etalon with Doppler True Pressure Tuning\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the LS50THa is its internal, unobstructed Fabry-Pérot etalon. By placing the etalon inside the telescope body, Lunt protects the critical component from damage and ensures thermal stability. The single etalon provides a narrow \u0026lt;0.6Å bandpass, which is the specification required to resolve high-contrast details against the bright solar disc.\u003c\/p\u003e\n\u003cp\u003eLunt’s Doppler True Tuning system uses air pressure to make fine adjustments to the etalon's bandpass. Unlike mechanical tilt-tuning which can introduce off-axis aberrations, pressure tuning provides a uniform, consistent view across the entire field. This allows you to shift the filter's transmission window to track features moving at high velocity, like eruptive prominences or plasma flows around active regions, without any degradation in image quality.\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\u003eB400 Blocking Filter for Visual Safety and Contrast\u003c\/h3\u003e\n\u003cp\u003eThis Standard Kit includes the B400 blocking filter, housed in a 1.25\" star diagonal. The blocking filter is a non-negotiable safety component, removing all harmful radiation outside the H-alpha line before the light reaches your eye. The 4mm aperture of the B400 is optimized for visual observation, providing a fully illuminated field of view for full-disc observation without any vignetting.\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\u003eSimple and Effective Helical Focuser\u003c\/h3\u003e\n\u003cp\u003eFocusing is managed by a robust helical focuser. This simple, intuitive design is easy to use, especially when wearing gloves in colder weather. While it lacks the fine control of a dual-speed Crayford, the helical focuser provides a direct, backlash-free mechanism for achieving a sharp image, which is perfectly adequate for the visual magnifications this telescope is designed for. The trade-off for simplicity is that the eyepiece and any attached camera will rotate during focus adjustment.\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\u003eSafe and Fast Solar Alignment with the SunLock Finder\u003c\/h3\u003e\n\u003cp\u003eThe integrated SunLock sun finder makes aiming the telescope safe and effortless. This small internal projection system casts a tiny image of the solar disc onto a white screen. To align the telescope, you simply adjust your mount until the projected image is centered on the screen. This system entirely eliminates the danger and difficulty of trying to find the sun through the main scope or a traditional finder.\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\u003eObserving a Hedgerow Prominence with the LS50THa\u003c\/h3\u003e\n\u003cp\u003eCenter a large active region on the limb of the sun and insert a medium-power eyepiece, around 8mm to 12mm. As your eye adapts, you will see the bright, boiling texture of the chromosphere. Slowly turn the pressure tuning knob. The surface details will fade slightly as the bandpass shifts, and suddenly, fiery structures will leap into view off the limb.\u003c\/p\u003e\n\u003cp\u003eA classic hedgerow prominence, which looks like a soft glow in a lesser instrument, resolves into a forest of fine, feathery plasma tendrils. With the LS50THa's pressure tuner, you can follow these structures as they arch and twist, sometimes seeing brighter knots of material that indicate areas of intense magnetic activity. This direct, real-time view of the sun’s violent atmosphere is what makes a dedicated H-alpha telescope an essential 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\u003eChoosing Your Lunt 50mm Solar Telescope\u003c\/h3\u003e\n\u003cp\u003eLunt offers several packages for the 50mm platform, each tailored to a specific use case. This Standard Kit is the ideal starting point for a dedicated visual observer.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS50THa Standard Kit (This Model):\u003c\/strong\u003e Features the B400 blocking filter and a helical focuser. It is the most affordable and portable package, perfectly matched for visual observation and getting started in H-alpha.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS50THa Enhanced Kit:\u003c\/strong\u003e Upgrades to a B600 blocking filter and a 10:1 Rack \u0026amp; Pinion focuser. The larger blocking filter is better suited for imagers using cameras with larger sensors, and the focuser provides more precise control, which is critical for photography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS50THa Premium PLUS Kit:\u003c\/strong\u003e Includes the B600 blocking filter, R\u0026amp;P focuser, and an external LS50C double-stacking etalon. This configuration narrows the bandpass to \u0026lt;0.3Å, dramatically increasing surface contrast to make filaments and active regions appear almost three-dimensional. This is the ultimate package for the high-resolution observer or imager.\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 difference between the Lunt LS50THa B400 and B600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe B400 (4mm) and B600 (6mm) refer to the aperture of the blocking filter. The B400 is optimized for visual use, providing a fully illuminated field for full-disc views. The B600 provides a larger illuminated field, which is recommended for observers who plan to do solar imaging with cameras that have larger sensors to prevent vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I upgrade the LS50THa to a double-stack system later?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. You can add the Lunt LS50C front-mounted etalon at any time. This screws onto the front of the telescope and, when used with the internal etalon, reduces the system bandpass to under 0.3Å. This significantly increases contrast on solar surface details like filaments and plage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the LS50THa good for taking pictures of the sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS50THa is capable of basic solar imaging with small, lightweight planetary-style cameras. However, the helical focuser can make achieving critical focus for imaging a challenge. For users primarily interested in imaging, the Enhanced Kit with the 10:1 Rack \u0026amp; Pinion focuser is a better choice.\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 Lunt LS50THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS50THa is very lightweight and compact. It will perform well on a solid photo tripod with a fluid video head, or a light astronomical alt-azimuth mount like a Vixen Porta Mount II or Sky-Watcher AZ-GTe. An equatorial mount is not necessary for visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the pressure tuner different from a tilt tuner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLunt's pressure tuner adjusts the etalon by changing air pressure, which keeps the filter perfectly parallel to the light path. This provides a very even, high-fidelity view across the entire field. Tilt-tuning, used on some other solar scopes, physically tilts the etalon, which can introduce some image degradation off-axis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I be able to see solar flares?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, solar flares are visible in H-alpha as intensely bright patches near active regions. The LS50THa has the resolution and contrast required to show them clearly. The pressure tuner helps you dim the surrounding plage to make the flare stand out.\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 Aperture\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEFL\u003c\/td\u003e\n\u003ctd\u003e350 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.6 Ångström @ 656nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eDoppler True Tuning (Pressure Tuning)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB400 in 1.25\" Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e1.25\" Helical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eClamshell with 1\/4-20 tapped holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eAluminum Finished Hard Case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.6 lbs (2.1 kg)\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\"\u003eLS50THa 50mm H-Alpha Telescope\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\"\u003eB400 Blocking Filter in Diagonal\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\"\u003eIntegrated SunLock Sun Finder\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\"\u003eTelescope Clamshell Ring\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\" Vixen-Style Dovetail Bar\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\"\u003e12mm Lunt Eyepiece\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\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\/Lunt-LS50THa-Solar-Telescope-Manual.pdf?v=1777432302\" 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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":51230513529117,"sku":"LSS-LS50THa-Standard","price":1673.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LuntLS50THASolarTelescopeStandardKit.jpg?v=1777667488"},{"product_id":"lunt-ls50tha-h-alpha-solar-telescope-enhanced-kit","title":"Lunt LS50THa H-Alpha Solar Telescope - Enhanced Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 50mm\u003c\/li\u003e\n\u003cli\u003eBandpass: \u0026lt;0.6Å Single-Stack\u003c\/li\u003e\n\u003cli\u003eTuning: Doppler True Tuning (Pressure Tuner)\u003c\/li\u003e\n\u003cli\u003eFocuser: 1:1 Rack \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003eBlocking Filter: B600 (6mm)\u003c\/li\u003e\n\u003cli\u003eFocal Length: 350mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio: f\/7\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\u003eA High-Contrast Window on the Active Sun\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS50THa H-Alpha Solar Telescope - Enhanced Kit is a complete, dedicated instrument engineered for the observer who wants to move beyond basic solar views into high-contrast detail. By combining a 50mm aperture with an upgraded focuser and a larger blocking filter, this package delivers a significant performance step-up for resolving the dynamic, fine-scale structure of the Sun's chromosphere.\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 50mm Hydrogen-alpha Etalon\u003c\/h3\u003e\n\u003cp\u003eThe heart of the LS50THa is its precision front-mounted etalon, a solid-cavity filter with a bandpass specification of less than 0.6 Angstroms. This narrow window on the spectrum isolates the deep red light of hydrogen-alpha, revealing the Sun not as a bright disc, but as a turbulent body of plasma. The 50mm aperture provides a 25% increase in light-gathering power over 40mm scopes, resulting in brighter images and the ability to use higher magnifications on delicate prominence structures.\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\u003eDoppler True Tuning with the Lunt Pressure Tuner\u003c\/h3\u003e\n\u003cp\u003eLunt's Doppler True Tuning system uses air pressure to adjust the etalon's bandpass, a method with distinct advantages over mechanical tilt-tuning. Applying pressure changes the refractive index of the air between the etalon plates, shifting the filter's central wavelength without tilting the etalon itself. This maintains a more uniform bandpass across the entire field of view, preventing off-axis hot-spotting and delivering higher-contrast views from edge to edge.\u003c\/p\u003e\n\u003cp\u003eThis tuning control is what allows you to see the motion of solar plasma. As a filament or prominence erupts towards or away from you, its light is Doppler-shifted. By adjusting the pressure tuner, you can follow that motion into the \"wings\" of the H-alpha line, transforming a static view into a dynamic one and revealing the three-dimensional structure of active regions.\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 Upgraded 1:1 Rack \u0026amp; Pinion Focuser\u003c\/h3\u003e\n\u003cp\u003eThe Enhanced Kit replaces the standard helical focuser with a more robust 1:1 Rack \u0026amp; Pinion unit. This is a critical upgrade for detailed observation. The R\u0026amp;P focuser provides smoother, more precise travel with zero image shift, allowing you to achieve and hold critical focus on faint, wispy prominence details that a less stable focuser can struggle with. This makes the observing experience more fluid and less frustrating, especially at higher powers.\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\u003eB600 Blocking Filter for a Wider Field\u003c\/h3\u003e\n\u003cp\u003eThis kit includes the 6mm B600 blocking filter, an important step up from the B400 found in the standard package. The larger aperture of the blocking filter provides a wider, fully illuminated field of view, reducing vignetting (dimming at the edges) when using lower-power, wide-field eyepieces. For observers who enjoy framing the entire solar disc with room to spare, or for those starting out with imaging, the B600 provides a more forgiving and complete picture.\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\u003eObserving the Solar Limb\u003c\/h3\u003e\n\u003cp\u003eWith a medium-power eyepiece, the LS50THa presents the full solar disc against a truly black background. As your eye adapts, focus on the limb. A small, bright eruption that appears as a detached spike is a classic prominence. Using the pressure tuner, you can subtly adjust the view, watching as the finest thread-like details within the prominence sharpen and seem to float above the edge of the Sun. This ability to fine-tune the contrast is what separates a simple glance from a detailed study.\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 for Double-Stacking for Ultimate Contrast\u003c\/h3\u003e\n\u003cp\u003eThe LS50THa is designed to be compatible with the optional LS50C front-mounted double-stack filter. Adding this second etalon is the single most effective upgrade for this telescope. It narrows the system's bandpass to less than 0.30 Angstroms, dramatically increasing contrast on the solar surface. This transforms faint filaments and plage from subtle shadings into bold, high-definition features, revealing the \"carpet\" of the chromosphere in a way a single-stack system cannot.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this increase in surface detail is a slightly dimmer image, which is why starting with a single-stack system is often recommended. However, the modular design means your investment is secure, with a clear and powerful upgrade path available when you are ready to see the highest possible level of solar detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch3\u003eLunt Solar Telescope Kit Comparison\u003c\/h3\u003e\n\u003cp\u003eLunt offers the LS50THa in several packages to match different observing goals and budgets. Understanding the trade-offs in focuser type and blocking filter size is key to selecting the right system for your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Kit:\u003c\/strong\u003e The most accessible entry point. It includes the same 50mm etalon but uses a helical focuser and a smaller B400 (4mm) blocking filter. This is an excellent visual package, but the B400 can introduce vignetting with very low-power eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Kit (This Product):\u003c\/strong\u003e The observer's sweet spot. It upgrades two key components: the focuser is a smoother 1:1 Rack \u0026amp; Pinion, and the blocking filter is the larger B600 (6mm). These changes provide a better experience for detailed visual work and entry-level imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium PLUS Kit:\u003c\/strong\u003e The ultimate 50mm package. This kit includes the 1:1 R\u0026amp;P focuser, B600 filter, and bundles the LS50C front-mounted double-stack filter from the start. This delivers the highest-contrast surface views possible with the 50mm system, right out of the box.\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's the real difference between the B600 and B400 blocking filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe B600 has a 6mm aperture versus the B400's 4mm. This provides a wider, fully illuminated field of view, which reduces the dimming you might see at the edge of the field with low-power eyepieces. The B600 is recommended for those who want to do any form of imaging or prefer expansive, full-disc views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs double-stacking the LS50THa worth it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is the most significant performance upgrade you can make. Adding the LS50C filter narrows the bandpass to \u0026lt;0.30Å, which dramatically increases contrast on the Sun's surface. Filaments, active regions, and plage become much more defined. The trade-off is a slightly dimmer image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does this kit have a Rack \u0026amp; Pinion focuser instead of a helical one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Rack \u0026amp; Pinion (R\u0026amp;P) focuser in the Enhanced Kit provides smoother, more precise focus control than the helical focuser in the standard kit. It is less prone to image shift, which is critical when trying to achieve sharp focus on faint solar details at high magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my regular nighttime eyepieces with this solar telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, any standard 1.25\" astronomical eyepiece will work. Simpler designs with fewer glass elements, like Plössls, often perform very well for solar viewing by maximizing contrast and brightness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lunt LS50THa good for a beginner in solar astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LS50THa is an excellent choice for a serious beginner. It is a complete, dedicated system that is easy to set up and provides high-quality views that will keep you engaged for years. The Enhanced Kit is particularly good as the upgraded focuser and blocking filter address the first upgrades many new observers consider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need any other filters to observe the sun safely?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The LS50THa is a complete, dedicated solar telescope. The internal etalon and the blocking filter in the diagonal work together to make viewing 100% safe. You must never use a front-mounted white-light filter with this telescope, nor should you ever remove the blocking filter diagonal.\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\u003eTelescope Type\u003c\/td\u003e\n\u003ctd\u003eDedicated H-alpha Solar Telescope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e350 mm\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\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.6 Angstrom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eInternal Pressure Tuner (Doppler True Tuning)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB600 (6mm) in 1.25\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e1:1 Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eVixen-style Dovetail Plate (4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.6 lbs (2.1 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eAluminum Hard Case with Custom Foam\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt LS50THa H-Alpha Telescope\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-LS50THa-Telescope.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLS50THa 50mm H-alpha Telescope\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt B600 Blocking Filter Diagonal\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-B600-Blocking-Filter.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eB600 Blocking Filter in 1.25\" Diagonal\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt 1:1 Rack \u0026amp; Pinion Focuser\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-RP-Focuser.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1:1 Rack \u0026amp; Pinion Focuser\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt 8mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-8mm-Eyepiece.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8mm Lunt Eyepiece\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt 12mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-12mm-Eyepiece.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e12mm Lunt Eyepiece\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt 16mm Eyepiece\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-16mm-Eyepiece.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e16mm Lunt Eyepiece\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt SunLock Solar Finder\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-SunLock-Finder.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSunLock Solar Finder\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\u003cimg class=\"DAV-img-box\" alt=\"Lunt Telescope Hard Case\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-Telescope-Case.jpg?v=1781295601\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHard Case with Custom Foam\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\/Lunt-LS50THa-Solar-Telescope-Manual.pdf?v=1777432302\" 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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":51230513627421,"sku":"LSS-LS50THa-Enhanced","price":1953.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LuntLS50THASolarTelescopeEnhancedKit.jpg?v=1777667525"},{"product_id":"lunt-ls50tha-h-alpha-solar-telescope-premium-plus-kit","title":"Lunt LS50THa H-Alpha Solar Telescope - Premium PLUS Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 50mm\u003c\/li\u003e\n\u003cli\u003eSystem Bandpass: \u0026lt;0.30Å (Double-Stacked)\u003c\/li\u003e\n\u003cli\u003eTuning: Internal Pressure Tuner (Doppler True Tuning)\u003c\/li\u003e\n\u003cli\u003eBlocking Filter: B600 in 1.25\" Diagonal\u003c\/li\u003e\n\u003cli\u003eFocuser: 1:1 Rack \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003eFocal Length: 350mm\u003c\/li\u003e\n\u003cli\u003eIncluded Eyepiece: Lunt Zoom Eyepiece\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\u003c!-- TAB-MARKER-1: DESCRIPTION --\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\u003eFrom Prominences to Chromosphere: A Complete H-Alpha System\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS50THa H-Alpha Solar Telescope - Premium PLUS Kit is a complete, dedicated system designed to deliver high-contrast, high-resolution views of the Sun's dynamic chromosphere. This package combines a 50mm primary objective with two precision-tuned etalons, achieving a sub-0.30 Angstrom bandpass for the most detailed solar observation possible in this aperture class. It is the right choice for the observer who wants to move beyond limb phenomena and resolve the intricate, evolving texture of the solar disk itself.\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 50mm f\/7 Optical Foundation\u003c\/h3\u003e\n\u003cp\u003eThe heart of the LS50THa is its 50mm f\/7 singlet objective lens. This aperture provides a significant increase in resolving power over smaller 40mm scopes, rendering finer detail in solar prominences and the structure within sunspot umbrae. The 350mm focal length creates a manageable image scale that is well-matched to the included B600 blocking filter and zoom eyepiece, allowing you to frame the full solar disk or zoom in on active regions without needing Barlows.\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\u003eInternal Pressure-Tuned Etalon for Uniformity\u003c\/h3\u003e\n\u003cp\u003eInside the main optical tube lies the primary sub-aperture etalon, the core filtering engine of the telescope. Lunt's innovative pressure tuning system adjusts the air pressure within the etalon cavity, shifting the filter's bandpass with zero mechanical stress on the optics. This Doppler True Tuning method provides a more uniform view across the entire field compared to mechanical tilt-tuning, which can introduce bandpass variations and gradients from the center to the edge of the view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDouble-Stacking for a High-Fidelity Chromosphere\u003c\/h3\u003e\n\u003cp\u003eThe Premium PLUS kit's defining feature is the included LS50C front-mounted double-stack etalon. Adding this second filter dramatically narrows the system's final bandpass from ~0.6Å to less than 0.30Å. This is not a subtle change; the reduction in out-of-band light significantly increases contrast on the solar disk, causing faint filaments, active region plage, and the mottled \"orange peel\" texture of the chromosphere to snap into sharp relief. While a single-stack system excels at prominences, this double-stack configuration is optimized for revealing the complex, three-dimensional surface of the Sun.\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 B600 Blocking Filter: A Matched System\u003c\/h3\u003e\n\u003cp\u003eThe blocking filter, housed in the star diagonal, is the final critical component in the safety chain. This kit includes the B600, with a 6mm aperture perfectly suited for visual observation and imaging with smaller-chip cameras. It provides a generous field around the solar disk at the native 350mm focal length, ensuring you never suffer from a vignetted or cut-off view of the Sun's limb and surrounding prominence activity.\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\u003eUpgraded Focuser and Versatile Zoom Eyepiece\u003c\/h3\u003e\n\u003cp\u003eThis kit moves beyond the helical focuser of the standard package to a more robust 1:1 Rack \u0026amp; Pinion focuser. This design is better equipped to handle the weight of cameras and multiple eyepieces without flexure, providing a more stable and repeatable focusing experience. Paired with the included Lunt Zoom eyepiece, you can move from a full-disk contextual view to high-magnification close-ups of an active region with a simple twist, maintaining focus and keeping your target centered.\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\u003eSunLock Finder for Safe and Fast Alignment\u003c\/h3\u003e\n\u003cp\u003eFinding and centering the Sun without looking at it is the first challenge of any solar observation. The included SunLock is a purpose-built solar finder that projects a small image of the Sun onto a viewing screen. Simply center the dot on the screen, and the Sun will be in the eyepiece field of view, eliminating any guesswork and ensuring a safe, immediate start to your session.\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\u003eAn Observer's View: Filaments on the Grid\u003c\/h3\u003e\n\u003cp\u003eWith the double-stack engaged and the pressure tuner dialed in, point the LS50THa at a large, snaking filament. At low power with the zoom eyepiece, it appears as a dark, irregular line against the brighter chromosphere. As you increase magnification, what was a simple line resolves into a structure with depth and texture. You can trace its path across the solar grid, noting the finer, thread-like extensions and anchor points that betray the powerful magnetic forces holding it in place against the Sun's surface. This is the view a \u0026lt;0.30Å bandpass makes 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\u003eSystem Trade-offs and Considerations\u003c\/h3\u003e\n\u003cp\u003eThe principal trade-off for the enhanced surface detail of the double-stack system is a slight dimming of the image compared to the single-stack configuration. While prominences remain bright and clear, the double-stack view prioritizes disk contrast over limb brightness. The 50mm aperture provides excellent detail but may be more susceptible to poor atmospheric seeing than a smaller 40mm scope, which can sometimes provide a steadier, albeit less resolved, image under turbulent daytime skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eChoosing Your Lunt 50mm Solar Telescope\u003c\/h3\u003e\n\u003cp\u003eLunt offers the LS50THa in several packages, each designed for a specific observer. The Premium PLUS Kit represents the pinnacle of the 50mm line, offering the highest-contrast views and most complete accessory package.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS50THa Standard Kit:\u003c\/strong\u003e This is the entry point, featuring a single etalon (\u0026lt;0.6Å), B400 blocking filter, and helical focuser. It is an excellent choice for focusing purely on solar prominences, offering the brightest possible view of structures on the Sun's limb.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS50THa Enhanced Kit:\u003c\/strong\u003e This package upgrades the blocking filter to the B600 for a wider field of view and moves to the 1:1 Rack \u0026amp; Pinion focuser. It remains a single-stack system, making it a great option for those who want a better focuser and a more complete view of the disk but do not yet require the highest surface contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS50THa Premium PLUS Kit:\u003c\/strong\u003e The subject of this page. By adding the LS50C double-stack filter, this kit achieves the narrowest bandpass (\u0026lt;0.30Å) for maximum chromospheric detail. It is the definitive choice for the serious visual observer or imager who prioritizes resolving filaments, plage, and granulation over all else.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-2: FAQ --\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the main difference between single-stack and double-stack solar telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA single-stack telescope (~0.6Å) provides bright, high-contrast views of prominences on the Sun's edge. A double-stack system (\u0026lt;0.30Å) narrows the filter bandpass, which dims the image slightly but dramatically increases contrast on the Sun's surface, making features like filaments and active regions much more detailed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the LS50THa Premium PLUS Kit good for imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is well-suited for imaging with small-chip, high-frame-rate planetary-style cameras. The \u0026lt;0.30Å bandpass is ideal for capturing high-contrast surface detail, and the upgraded Rack \u0026amp; Pinion focuser can better support the weight of a camera setup than a helical focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does Lunt use pressure tuning instead of tilt tuning?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePressure tuning adjusts the etalon's bandpass without tilting it, which ensures a more uniform image and prevents off-axis reflections or gradients in the view. It is a more advanced method that maintains the highest performance across the entire solar disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a special mount for the LS50THa?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the LS50THa is very lightweight and compact. It will perform well on any light-duty astronomical mount with a Vixen-style saddle, such as a Sky-Watcher AZ-GTi, an iOptron SkyGuider Pro with a ball head, or any small equatorial mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this telescope for night sky viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the LS50THa is a dedicated solar telescope. Its internal filters are designed specifically for viewing the Sun in the Hydrogen-alpha wavelength and will not pass enough light from stars or planets for nighttime observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the B600 and B1200 blocking filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe B600 (6mm) blocking filter included in this kit is ideal for visual use and imaging the full solar disk. A larger B1200 (12mm) filter would provide a wider illuminated field, which is primarily a benefit for imagers using cameras with larger sensors to create mosaics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-3: SPECIFICATIONS --\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Aperture\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e350 mm\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\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.6 Angstrom (Single-Stack) \/ \u0026lt;0.30 Angstrom (Double-Stacked)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eInternal Pressure Tune (Doppler True Tuning)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB600 in 1.25\" Star Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e1:1 Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eVixen-Style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eAluminum Hard Case with Custom Foam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.4 lbs (2 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-4: IN THE BOX --\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\"\u003eLS50THa 50mm H-Alpha Solar Telescope\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\"\u003eLS50C Front-Mount Double-Stack Etalon Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eB600 Blocking Filter in 1.25\" Star Diagonal\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\"\u003e1:1 Rack \u0026amp; Pinion Focuser\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\"\u003eLunt Zoom Eyepiece\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\"\u003eSunLock Sol Searcher\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\" Vixen-Style Dovetail Bar\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 with Custom Foam\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-5: MANUAL --\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\/Lunt-LS50THa-Solar-Telescope-Manual.pdf?v=1777432302\" 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\"\u003eLS50THa 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:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Lunt-LS50FHa-Double-Stack-Manual.pdf?v=1777432302\" 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\"\u003eDouble-Stack Filter Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c!-- TAB-MARKER-6: WARRANTY --\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":51230513692957,"sku":"LSS-LS50THa-Premium","price":2933.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LuntLS50THASolarTelescopePremiumKit.jpg?v=1777667542"}],"url":"https:\/\/davidastro.com\/fr\/collections\/lunt-tha-h-alpha-solar-telescopes.oembed","provider":"David Astro","version":"1.0","type":"link"}