{"product_id":"lunt-ls230tha-230mm-double-stack-solar-telescope","title":"Lunt LS230THa 230mm Double Stack Solar Telescope","description":"\u003cdiv class=\"kt-page\"\u003e\n\n\u003cstyle\u003e\n.kt-page{--kt-primary:#030B1C;--kt-accent:#2E7FBF;max-width:1100px;margin:0 auto;font-family:inherit;}\n.kt-page.kt-page--wide{max-width:1600px;}\n.kt-page .kt-hero{display:flex;align-items:center;gap:40px;margin-bottom:40px;}\n.kt-page .kt-hero-copy{flex:1 1 55%;}\n.kt-page .kt-hero-img{flex:1 1 40%;text-align:center;}\n.kt-page .kt-sq{width:100%;max-width:420px;aspect-ratio:1\/1;margin:0 auto;background:#ffffff;border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden;}\n.kt-page .kt-sq img{max-width:92%;max-height:92%;width:auto;height:auto;object-fit:contain;}\n.kt-page .kt-hero-copy h2{font-size:26px;margin-bottom:14px;}\n.kt-page .kt-hero-copy p{font-size:16px;line-height:1.6;margin-bottom:14px;}\n.kt-page .kt-features{display:flex;align-items:flex-start;gap:40px;margin:40px 0;}\n.kt-page .kt-features-copy{flex:1 1 55%;}\n.kt-page .kt-features-img{flex:1 1 40%;text-align:center;}\n.kt-page .kt-section-heading{font-size:21px;display:inline-block;padding-bottom:8px;border-bottom:2px solid var(--kt-accent);margin-bottom:18px;}\n.kt-page .kt-feature-list{list-style:none;margin:0;padding:0;}\n.kt-page .kt-feature-list li{font-size:16px;line-height:1.5;margin-bottom:12px;padding-left:26px;position:relative;}\n.kt-page .kt-feature-list li:before{content:\"\\2713\";color:var(--kt-accent);font-weight:bold;position:absolute;left:0;}\n.kt-page .kt-feature-list b{color:#222;}\n.kt-page .kt-specs-wrap{box-sizing:border-box;}\n.kt-page .kt-specs{display:table !important;width:100% !important;border-collapse:collapse;margin:40px 0;font-size:15px;}\n.kt-page .kt-specs th,.kt-page .kt-specs td{border:2px solid #000;padding:10px 12px;text-align:left;}\n.kt-page .kt-specs th{background:var(--kt-primary) !important;color:#fff !important;font-size:16px;}\n.kt-page .kt-specs tr:nth-child(even){background:#f2f2f2;}\n.kt-page .kt-specs tr:nth-child(odd){background:#ffffff;}\n.kt-page .kt-cta{text-align:center;margin:40px 0;font-size:18px;font-weight:bold;}\n.kt-page .kt-cta-buttons{display:flex;justify-content:center;gap:16px;margin-top:16px;flex-wrap:wrap;}\n.kt-page .kt-cta-buttons a{display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;font-size:15px;transition:all .15s ease;}\n.kt-page .kt-cta-buttons a:hover{background:var(--kt-primary);color:#fff;}\n.kt-page .kt-manuals a{display:block;color:var(--kt-primary);font-weight:bold;font-size:30px;text-align:left;text-decoration:none;margin-bottom:10px;}\n.kt-page .kt-manuals a:hover{color:var(--kt-accent);}\n@media (max-width:768px){\n  .kt-page .kt-hero,.kt-page .kt-features{flex-direction:column;}\n  .kt-page .kt-hero-img img,.kt-page .kt-features-img img{max-width:400px;}\n  .kt-page .kt-hero-copy p,.kt-page .kt-features-copy p{font-size:17px;}\n  .kt-page .kt-cta-buttons{display:grid;grid-template-columns:1fr 1fr;gap:12px;}\n  .kt-page .kt-cta-buttons a:nth-child(3){grid-column:1 \/ span 2;}\n  .kt-page .kt-manuals a{font-size:24px;}\n}\n\u003c\/style\u003e\n\n\u003cdiv class=\"kt-hero\"\u003e\n  \u003cdiv class=\"kt-hero-copy\"\u003e\n    \u003ch2\u003eFive Units of 230mm Double Stack Aperture\u003c\/h2\u003e\n        \u003cp\u003eThe Lunt LS230THa is the largest dedicated hydrogen alpha telescope Lunt has offered, and only five units are being built. A 230 mm FLP51 air spaced doublet sits behind a custom infrared reflective coating that sheds thermal load before it reaches the etalons. This is a solar only instrument, designed without compromise for the chromosphere.\u003c\/p\u003e\n    \u003cp\u003eDouble stacking is standard. Two independently tuned etalons run in series, one at 0.6 Angstrom and one at the new generation 0.35 Angstrom specification, hand matched per unit for a combined bandpass near 0.30 Angstrom. A High Resolution Glass filter removes off band continuum glow, so the background goes genuinely dark and chromospheric structure carries its full contrast.\u003c\/p\u003e\n    \u003cp\u003eTwo PC-USB Pressure Tuner controllers ship with the telescope, one per etalon, each accurate to 0.3 PSI with more than twelve hours of internal battery. Because both etalons must track together, remote closed loop control lets you record tandem pressure positions and return to them exactly on a later session. Lead time runs about six months.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kt-hero-img\"\u003e\n    \u003cdiv class=\"kt-sq\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/8273\/7521\/files\/230-pic-3.jpg?v=1743113056\" alt=\"Lunt LS230THa 230mm double stack hydrogen alpha solar telescope on its observatory mounting\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"kt-features\"\u003e\n  \u003cdiv class=\"kt-features-copy\"\u003e\n    \u003ch3 class=\"kt-section-heading\"\u003eKey Features\u003c\/h3\u003e\n    \u003cul class=\"kt-feature-list\"\u003e\n      \u003cli\u003e\n\u003cb\u003e230mm Unobstructed\u003c\/b\u003e - aperture in an FLP51 air spaced doublet, the largest dedicated solar refractor offered to the public.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eDouble Stack Standard\u003c\/b\u003e - pairs a 0.6 Angstrom etalon with a new generation 0.35 Angstrom unit for roughly 0.30 Angstrom combined.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eHand Matched Per Unit\u003c\/b\u003e - means every etalon pair is individually assembled and verified on precision metrology equipment before shipping.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eHRG Filter\u003c\/b\u003e - removes off band red and orange continuum, giving a dark background and maximum chromospheric contrast.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eDual PC-USB Control\u003c\/b\u003e - supplies one Lunt Pressure Tuner controller per etalon, accurate to 0.3 PSI with automatic temperature compensation.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cb\u003eLimited Edition\u003c\/b\u003e - production is capped at five instruments with a lead time of about six months, and the run will not be repeated.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"kt-features-img\"\u003e\n    \u003cdiv class=\"kt-sq\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0615\/8273\/7521\/files\/230-pic-1.jpg?v=1743113056\" alt=\"Detail of the Lunt LS230THa dual pressure tuned etalon section and Feather Touch focuser\"\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"kt-specs-wrap\"\u003e\n\u003ctable class=\"kt-specs\"\u003e\n  \u003ctr\u003e\u003cth colspan=\"2\"\u003eSpecifications\u003c\/th\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eLS230THa\/B3400\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eDedicated hydrogen alpha refractor, FLP51 air spaced doublet, fully unobstructed, custom infrared reflective coating on the front element\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e230 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e1,610 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\u003eBandwidth\u003c\/td\u003e\n\u003ctd\u003eApproximately 0.30 Angstrom combined, from a 0.6 Angstrom and 0.35 Angstrom double stack pair\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eEtalon System\u003c\/td\u003e\n\u003ctd\u003eDual internal pressure tuned etalons in series, tuned in tandem, hand matched and verified per unit\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eHRG Filter\u003c\/td\u003e\n\u003ctd\u003eHigh Resolution Glass filter integral to the optical train\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB3400, 34 mm clear aperture, internally mounted and Lunt modified\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eStarlight Instruments Feather Touch 2 inch with 10:1 fine focus reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eLunt Pressure Tuner, dual Doppler True barometric pressure tuning with two PC-USB controllers accurate to 0.3 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eImage Size at Focal Plane\u003c\/td\u003e\n\u003ctd\u003eApproximately 16 mm solar disk\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eNight Sky Use\u003c\/td\u003e\n\u003ctd\u003eNo, dedicated solar instrument\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eProduction\u003c\/td\u003e\n\u003ctd\u003eLimited edition of 5 units, lead time approximately 6 months, subject to prior sale\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot published\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWhat's Included\u003c\/td\u003e\n\u003ctd\u003eOptical tube assembly, dual pressure tuned etalon system, HRG filter, B3400 blocking filter, Feather Touch focuser, two PC-USB Pressure Tuner controllers with power adapters, tube rings and mounting plate\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years from date of purchase, original purchaser only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\n\n\u003cp class=\"kt-cta\"\u003e\n  Talk to a Specialist\n  \u003cspan class=\"kt-cta-buttons\"\u003e\n    \u003ca href=\"\/pages\/contact\" style=\"display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;\"\u003eContact Us\u003c\/a\u003e\n    \u003ca href=\"mailto:sales@telescopedepot.com\" style=\"display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;\"\u003eEmail a Specialist\u003c\/a\u003e\n    \u003ca href=\"\/pages\/shipping\" style=\"display:inline-block;padding:12px 26px;border:2px solid var(--kt-primary);border-radius:4px;color:var(--kt-primary);text-decoration:none;font-weight:bold;\"\u003eShipping Info\u003c\/a\u003e\n  \u003c\/span\u003e\n\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Lunt Solar Systems","offers":[{"title":"B3400 Blocking Filter","offer_id":53917556113519,"sku":"LS230THa\/B3400","price":39995.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/7968\/0367\/files\/230-pic-3.jpg?v=1785527459","url":"https:\/\/telescopedepot.com\/products\/lunt-ls230tha-230mm-double-stack-solar-telescope","provider":"Telescope Depot","version":"1.0","type":"link"}