{"product_id":"lunt-ls50fha-front-mount-50mm-double-stack-solar-filter","title":"Lunt LS50FHa Front Mount 50mm Double Stack Solar Filter","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eLS50FHa — 50mm Front-Mount H-Alpha Solar Filter\u003c\/strong\u003e \u003cem\u003eA 0.35Å tilt-tuned etalon for two purposes: double-stack upgrade for the Lunt LS60MT, or standalone H-alpha filter for compatible customer refractors.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e\u003cem\u003eNow with new-generation etalons — every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe LS50FHa is a 50mm aperture front-mounted tilt-tuned H-alpha filter with a verified bandpass of 0.35Å. It serves two distinct purposes — as a double-stack etalon for the Lunt LS60MT Modular Telescope, or as a standalone H-alpha solar filter for a customer-supplied compatible refractor.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eAs a double-stack filter for the LS60MT:\u003c\/strong\u003e The LS50FHa mounts to the front of the LS60MT in night configuration, placing its 0.35Å tilt-tuned etalon in series with the LS60MT's internal 0.45Å pressure-tuned etalon. Combined system bandpass: \u0026lt;0.28Å. No factory visit required. The filter is easily removed for night-sky use.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eAs a standalone H-alpha filter for customer refractors:\u003c\/strong\u003e The LS50FHa retrofits a compatible customer-supplied ED refractor for daytime solar observation and is easily removed for night use. A Lunt blocking filter must be used at all times — this is a safety requirement. Select the correct blocking filter for your telescope and intended use:\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eB600 — visual use on telescopes up to 540mm focal length\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eB1200 — visual use up to 1,080mm \/ imaging up to 540mm focal length\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eB1800 — visual use up to 1,620mm \/ imaging up to 1,080mm focal length\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eIf you are looking for a complete standalone H-alpha solar filter package including a blocking filter and adapter, Lunt offers complete 40mm and 50mm filter packages that include both.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eModel: LS50FHa\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eOptical Aperture: 50mm — no central obstruction\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eTuning: Tilt-tuned\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSingle Etalon Bandpass: 0.35Å — individually verified\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eDS Combined Bandpass: \u0026lt;0.28Å — LS50FHa (0.35Å) + LS60MT internal PT (0.45Å) in series\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCompatible With: Lunt LS60MT in night configuration; compatible customer ED refractors\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eBlocking Filter Required: Yes — sold separately\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eWeight: ~2 lbs (~1kg)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eStorage: Aluminum hard case with fitted foam\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starizona","offers":[{"title":"Default Title","offer_id":48746658889985,"sku":"LS50FHaP","price":1145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/LS50FHa_2.png?v=1778110197","url":"https:\/\/starizona.com\/products\/lunt-ls50fha-front-mount-50mm-double-stack-solar-filter","provider":"Starizona","version":"1.0","type":"link"}