{"product_id":"used-lunt-ls100tha-internal-double-stack-w-b3400-bf-losmandy-rings-dovetail-wo-1-25-durabright-diag-lunt-zoom","title":"Used Lunt LS100THa internal double stack w\/B3400 BF, Losmandy rings + dovetail, WO 1.25\" Durabright Diag. + Lunt Zoom","description":"\u003cp\u003eYou won't see this come up very often at this price.  This is a complete, loaded package for H-alpha solar, both for visual observing and for astrophotography.  It is the Lunt LS100THa H-alpha scope.  It has internal double-stacked pressure-tuned etalons. \u003c\/p\u003e\n\u003cp\u003eInstead of the stock B1800 blocking filter, this one has a \u003cstrong\u003eB3400\u003c\/strong\u003e blocking filter, which sells for $2200 all by itself!  Additionally, there are Losmandy DVR 108\/66 rings and a Losmandy dovetail, the Lunt 7.2-21.5mm Zoom eyepiece, a William Optics Durabright diagonal, and a Televue 2\" to 1.25\" adapter.  It comes in its original foam-lined aluminum case.  \u003c\/p\u003e\n\u003cp\u003eEverything is in excellent condition - the optics are clean, the body is unmarked.  We have tested the rig on the sun and the view is absolutely outstanding.  \u003c\/p\u003e\n\u003cp\u003eThe single-stack 100mm Lunt sells for over $5000.  The double-stack etalon adds on $2100 to that price.  The B3400 blocking filter is an additional $2200.  The Lunt Zoom eyepiece is another $200.  This entire package brand new would run you over \u003cstrong\u003e$9500\u003c\/strong\u003e; at just \u003cspan style=\"text-decoration: underline;\"\u003e$5000\u003c\/span\u003e for everything, this is almost \u003cstrong\u003ehalf-off\u003c\/strong\u003e and won't last!   \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe copy below is for the single-stack version of the scope, which includes the B1800 blocking filter:    \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe\u003cspan\u003e LS100THa\/B1800\/FT\u003c\/span\u003e is a complete Solar Telescope\u003c\/strong\u003e. The refractor based system has a \u003cstrong\u003eprecision aligned singlet chromatic lens\u003c\/strong\u003e with a 100 mm aperture. The front singlet lens reduces the stray-light over an achromat by half. With its matched collimation lens set, it also fully corrects on-axis coma, astigmatism and de-centering aberrations and provides a\u003cstrong\u003e full spherically corrected flat-field\u003c\/strong\u003e Solar-Telescope. The focal length is 714mm providing a ~7.3 mm image thru an included\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e18mm blocking filter.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCoarse focus adjustment is via a slide tube.\u003cstrong\u003e Focusing is achieved with a high precision 2″ Starlight Instruments\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eFeatherTouch dual\u003cspan\u003e \u003c\/span\u003e\u003c\/em\u003espeed focuser  10:1 reduction as standard equipment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn\u003cstrong\u003e internal etalon with Pressure Tune Adjustment\u003c\/strong\u003e allows for a \u003cstrong\u003e\u0026lt;0.7 Angstrom bandpass.  \u003c\/strong\u003eThe Etalon filter adjustment is \u003cem\u003e\u003cstrong\u003eNOT\u003c\/strong\u003e\u003c\/em\u003e  tilted to only simulate a balance to the air pressure, but the\u003cstrong\u003e air pressure in the filter system will adjust to 100 percent to the actual external air pressure. \u003c\/strong\u003eThereafter the air surrounding the Etalon can simply be compressed or decompressed by the tuning system in order to change the air pressure between the surfaces. \u003cstrong\u003eThis allows the Etalon surfaces to always remain at the same perfect angle to the light waves.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLunt Solar Systems'  Doppler  Pressure Tuning\u003c\/strong\u003e method allows the user to rapidly scan the scope’s sub-angstrom passband over the hydrogen alpha wavelength. Simply put, the advanced technology of \u003cstrong\u003eDoppler True Tuning\u003c\/strong\u003e for \u003cstrong\u003efine adjustment of the center wavelength\u003c\/strong\u003e allows research of the Sun’s disk and surface details at increased image scale. Prominences, flares, super granulation, filaments, and active regions will be seen or imaged with amazing precision. \u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eThe LS100THa can be\u003c\/span\u003e\u003cstrong\u003e internally double stacked\u003c\/strong\u003e\u003cspan\u003e (see\u003c\/span\u003e\u003ca href=\"http:\/\/telescopes.net\/store\/lunt-dsii-ls100t.html\" target=\"_self\"\u003e LS100Ha\/PT\/DSII)\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003eat time of purchase or anytime thereafter which\u003cstrong\u003e reduces the bandpass to \u0026lt;0.5 Angstroms\u003c\/strong\u003e.\u003c\/span\u003e\u003cstrong\u003e  Doublestacking provides a truly enhanced high definition view of the Suns' surface details.\u003c\/strong\u003e\u003cem\u003e  The Scope does not need to be returned to the factory for doublestacking \u003cspan\u003eas long as you have the red anodized front cell on your telescope.  If you have an older model (just a white tube with no red) you will need to upgrade the scope before using the internal double stack DSII-LS100T. \u003c\/span\u003e\u003cbr\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e* BLOCKING FILTERS are REQUIRED on all Lunt Solar Telescope Systems *\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eLunt Solar Systems currently offers 4 blocking filter apertures for use with our Etalon systems. The Blocking Filter houses additional filters which are required for the safety and performance of the solar package.  Lunt Solar blocking filters contain a unique filter system. Lunt will only warranty safety or performance when a Lunt blocking filter is paired with a Lunt H-alpha filter or telescope.\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eRequired Blocking Filter:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eB1200 for standard visual use  (scope focal length up to 1200mm)  optional\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eB1800\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor larger field of view - viewing and imaging applications\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003e(Included)\u003c\/strong\u003e\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eB3400 even  larger field of view and imaging applications (available only in extension tube or \"straight-thru\" design) optional\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eWhen imaging with a Lunt Solar System \u003c\/strong\u003eit is recommended that the user opt for the next larger \u003cstrong\u003eBlocking Filter \u003c\/strong\u003ethan that recommended for Visual use.  This is due to the fact that most Imaging Systems require additional \u003cstrong\u003e“backfocus”\u003c\/strong\u003e.  This requires that the Blocking Filter be moved further up the light cone. As a result the aperture of the Blocking filter needs to be larger to allow for the larger cone size.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Lunt Solar Systems LS100THa Hydrogen-Alpha Telescope comes with a precision aligned 100mm singlet chromatical lens.\u003c\/strong\u003e \u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal etalon system with tune adjustment that allows a maximum of \u0026lt;0.7 Angstrom bandpass. The internal modules have an optimized collimating system to reduce off axis aberration.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis Lunt 100mm Hydrogen-Alpha Telescope has a focal length of 714mm.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThis model includes a 2\" dual speed 10:1 Feathertouch focuser, clam shell mounting rings, sun finder, B1800 blocking filter, and a foam-lined case.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLS100T Features:\u003c\/strong\u003e (double stacked)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Aperture: 100mm\u003c\/li\u003e\n\u003cli\u003eEtalons: Internal \u0026lt;0.5 Angstrom\u003c\/li\u003e\n\u003cli\u003eTuning: Internal Pressure Tune\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e(Doppler True Tuning)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFocal Length: 800mm\u003c\/li\u003e\n\u003cli\u003eF Ratio: F\/7\u003c\/li\u003e\n\u003cli\u003eFocuser: 2″ Feather-Touch focuser with 10:1 reduction\u003c\/li\u003e\n\u003cli\u003eTube diameter: 121mm\u003c\/li\u003e\n\u003cli\u003eTube length with blocking filter: 634mm\u003c\/li\u003e\n\u003cli\u003eStorage: Aluminum finished hard case with fitted foam\u003c\/li\u003e\n\u003cli\u003eWeight: 13 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOptical tube with 2″ feather touch focuser with 2.5″ travel,\u003cbr\u003eincludes adapter\u003c\/li\u003e\n\u003cli\u003eB3400 Blocking Filter\u003c\/li\u003e\n\u003cli\u003eSun Finder: \u003cspan\u003eTelevue Sol Searcher\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eCase: Aluminum Finished Hard Case with Custom Foam\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"product__title\"\u003e\n\u003ch3\u003eLunt B3400 Blocking Filter\u003c\/h3\u003e\n\u003cp\u003eBlocking filters are required for proper use of all Lunt solar telescopes.\u003c\/p\u003e\n\u003cp\u003eThe Lunt Solar Systems B3400 Blocking Filter is housed in a 2\" straight-through extension tube with 2\" and T2 connections. Like all Lunt blocking filters, the B3400 houses additional filters. Significantly, this is required for the safety and performance of the solar package. It's important to realize that Lunt Solar blocking filters contain a unique filter system. Furthermore, we can only warranty safety or performance when one of our blocking filters is paired with a Lunt H-alpha filter or telescope.\u003c\/p\u003e\n\u003cp\u003eThe B3400 is best for visual work on telescopes with focal lengths up to 3400 mm, and for imaging work on scopes with focal lengths of up to 1800 mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"shopify-block-AWVE1WURsdThWNjJaU__klaviyo_reviews_average_rating_jWbxHW\" class=\"shopify-block shopify-app-block\"\u003e\n\u003cdiv aria-hidden=\"true\" class=\"kl_reviews__stars_badge\"\u003e\n\u003csvg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 20 20\" width=\"20\" height=\"20\" class=\"kl_reviews__empty_star\"\u003e\u003cdefs\u003e\u003clineargradient id=\"uhfkpk\"\u003e\u003c\/lineargradient\u003e\u003c\/defs\u003e\u003cpath id=\"icon-star-uhfkpk\" width=\"20\" height=\"20\" fill=\"url(#uhfkpk)\" stroke-width=\"2\" stroke=\"undefined\" stroke-linejoin=\"round\" d=\"M11.1488 2.23197C10.7159 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class=\"kl_reviews__star\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"shopify-block-Aa00xUGhSejdZaXVDT__apo_product_options_app_block_TCVHTn\" class=\"shopify-block shopify-app-block\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Lunt","offers":[{"title":"Default Title","offer_id":48331637293315,"sku":"U2606-MK-LUNT100THa","price":5000.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/milehighastro.com\/products\/used-lunt-ls100tha-internal-double-stack-w-b3400-bf-losmandy-rings-dovetail-wo-1-25-durabright-diag-lunt-zoom","provider":"Mile High Astronomy","version":"1.0","type":"link"}