{"product_id":"lunt-ls100mt-h-alpha-solar-telescope-premium-plus-kit","title":"Lunt LS100MT H-Alpha Solar Telescope - Premium PLUS Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 100mm ED Doublet\u003c\/li\u003e\n\u003cli\u003eBandpass (Double-Stacked): \u0026lt;0.28Å\u003c\/li\u003e\n\u003cli\u003eTuning System: Internal Pressure Tuner (Doppler True Tuning)\u003c\/li\u003e\n\u003cli\u003eBlocking Filter: B1800 (18mm)\u003c\/li\u003e\n\u003cli\u003eFocuser: Dual-Speed Rack \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003eFocal Length: 714mm\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\u003eThe Chromosphere in Unrivaled Contrast: The Lunt LS100MT Double-Stack Solar Telescope\u003c\/h2\u003e\n\u003cp\u003eThe Lunt LS100MT H-Alpha Solar Telescope - Premium PLUS Kit is a complete, professional-grade instrument engineered to reveal the solar chromosphere with the highest possible contrast. By combining a 100mm ED objective with two pressure-tuned etalons, this system achieves a tightly controlled \u0026lt;0.28Å bandpass, transforming the churning solar surface into a landscape of palpable, high-fidelity detail. It is the definitive choice for the observer or imager who demands a research-level view of solar filaments, plage, and active region evolution.\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 Foundation of Optical Excellence: The 100mm ED Doublet\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the LS100MT is a 100mm f\/7.14 apochromatic doublet objective. The use of FPL51 Extra-low Dispersion (ED) glass corrects for chromatic aberration, producing a sharp, high-contrast image free of false color. This optical purity is not only critical for isolating the narrow Hydrogen-alpha wavelength but also allows the LS100MT to serve as a high-performance nighttime telescope when the H-alpha module is removed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision Tuning without Compromise: The Internal Pressure-Tuned Etalon\u003c\/h3\u003e\n\u003cp\u003eLunt’s Doppler True Tuning system uses air pressure to adjust the refractive index within the primary etalon cavity, allowing you to shift the bandpass precisely onto the 656.28nm line. Unlike mechanical tilt-tuning which can introduce off-axis aberrations, pressure tuning keeps the etalon perfectly parallel to the light path. This results in a more uniform, higher-contrast image across the entire field of view, a critical advantage for both visual observation and full-disk 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\u003eRevealing the Surface: The SFPT Internal Double-Stack Module\u003c\/h3\u003e\n\u003cp\u003eThis Premium PLUS kit includes the internal SFPT double-stacking module, the key to its enhanced performance. Adding a second etalon in series with the first narrows the final bandpass from ≤0.35Å to a remarkable \u0026lt;0.28Å. This dramatic reduction in out-of-band light significantly increases contrast on the solar disk, causing the intricate, web-like structure of filaments and the bright mottling of plage around sunspots to stand out with startling clarity.\u003c\/p\u003e\n\u003cp\u003eWith the double-stack engaged, you are no longer just seeing features on the sun, you are observing their structure. A simple filament resolves into a multi-stranded, twisting rope of plasma held in place by magnetic fields. The view shifts from a two-dimensional disk to a dynamic, three-dimensional surface, which is the ultimate goal of dedicated solar observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFull-Disk Views without Vignetting: The B1800 Blocking Filter\u003c\/h3\u003e\n\u003cp\u003eThe blocking filter is a non-negotiable safety and performance component, and this kit includes the 18mm B1800. The larger aperture is matched to the telescope's 714mm focal length to provide a fully illuminated field for both eyepieces and imaging sensors. With the B1800, you can capture the entire solar disk, including towering prominences on the limb, without the dimming or vignetting at the edges that a smaller blocking filter would cause.\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\u003eCritical Focus for Fine Detail: The Dual-Speed Focuser\u003c\/h3\u003e\n\u003cp\u003eObserving the sun is a high-magnification discipline where precise focus is everything. The LS100MT employs a robust, dual-speed rack and pinion focuser that eliminates image shift and backlash. The 10:1 fine focus knob allows you to make the minute adjustments needed to snap the finest spicules on the limb or the delicate texture within a sunspot's penumbra into perfect, sharp relief.\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\u003eOne Telescope, Day or Night: The Modular Design\u003c\/h3\u003e\n\u003cp\u003eThe \"MT\" in LS100MT stands for Modular Telescope. The entire Hydrogen-alpha assembly, including the red etalon housing, can be removed from the main optical tube. With optional accessories, you can convert the 100mm ED doublet into a first-rate refractor for nighttime planetary and deep-sky viewing, a white-light solar scope using a Herschel wedge, or a Calcium-K instrument. This versatility makes the LS100MT a long-term investment in your observing, not just a single-purpose instrument.\u003c\/p\u003e\n\u003cp\u003eThe primary trade-off for this level of performance and versatility is the need for a stable, high-capacity mount. The weight and length of the LS100MT require an equatorial mount in the EQ5\/CG-5 class or higher to provide a steady, vibration-free platform for the high-magnification views it is designed to deliver.\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 100MT Configuration\u003c\/h3\u003e\n\u003cp\u003eLunt offers the LS100MT in several packages, allowing you to choose the right entry point for your observing goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Kit:\u003c\/strong\u003e This package includes the single-stack ≤0.35Å etalon and a B1200 blocking filter. It provides excellent views of solar prominences and basic surface detail, serving as a powerful entry into professional-grade solar astronomy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Kit:\u003c\/strong\u003e The Enhanced kit upgrades the blocking filter to the larger B1800, optimizing the system for imaging and ensuring a wider, fully illuminated field of view. It is the right choice if you plan to move into solar photography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium PLUS Kit:\u003c\/strong\u003e This is the ultimate configuration. It includes the B1800 blocking filter and the crucial SFPT internal double-stack module. For the observer who wants the highest possible contrast on surface features like filaments and active regions, this kit delivers the most detailed and dynamic view possible from a 100mm platform.\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\"\u003eIs the double-stack in the Premium PLUS kit worth the extra cost?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor viewing solar surface detail, yes. Double-stacking narrows the bandpass to \u0026lt;0.28Å, which dramatically increases the contrast of filaments, plage, and granulation. If prominences are your main interest, a single-stack is sufficient, but for the most dynamic, \"3D\" view of the chromosphere, the double-stack is a significant upgrade.\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 LS100MT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDue to its weight (12.7 lbs) and focal length, you will need a stable equatorial mount with a payload capacity of at least 25-30 lbs. A mount in the Celestron AVX, Sky-Watcher EQ5, or iOptron CEM26 class is a good starting point for visual use, with larger mounts recommended for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I convert the LS100MT for nighttime viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou simply unthread the red H-alpha etalon assembly from the main optical tube. You will then need a separate focuser and diagonal to attach to the back of the telescope tube for nighttime use. Lunt offers these accessories as part of a conversion kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does this kit use a B1800 blocking filter instead of a smaller one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 18mm aperture of the B1800 blocking filter is required to prevent vignetting (dimming at the edges of the field) with the LS100MT's 714mm focal length. This ensures a bright, fully illuminated image of the entire solar disk, which is especially important for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of pressure tuning over tilt tuning?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePressure tuning adjusts the etalon by changing the air pressure in the sealed chamber, which does not tilt the filter. This provides a more even and consistent bandpass across the entire field of view, avoiding the bright and dark bands that can sometimes appear with tilt-tuned systems.\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 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but H-alpha light shows the chromosphere, the layer above the sunspots. You will see the dark sunspot umbra and penumbra, but also the bright, energetic plage surrounding them and any filaments or flares in the active region, which are invisible in white light.\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\u003eTelescope Type\u003c\/td\u003e\n\u003ctd\u003eH-Alpha Solar \/ Modular Nighttime Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective\u003c\/td\u003e\n\u003ctd\u003eFPL51 ED Air-Spaced Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e714mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7.14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (Single-Stack)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.35 Angstrom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass (Double-Stack)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.28 Angstrom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eDoppler True Tuning (Internal Pressure Tuner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Filter\u003c\/td\u003e\n\u003ctd\u003eB1800 (18mm) in 2\" Diagonal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Dual-Speed Rack \u0026amp; Pinion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight\u003c\/td\u003e\n\u003ctd\u003e12.7 lbs (5.76 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e28.2\" (716 mm)\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\"\u003eLS100MT 100mm ED Doublet OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInternal H-Alpha Etalon with Pressure Tuner\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\"\u003eSFPT Internal Double-Stack H-Alpha Etalon\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\"\u003eB1800 Blocking Filter in 2\" 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\"\u003eDual-Speed 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 (7.2mm - 21.5mm)\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\"\u003eRed Dot Sun Finder Handle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8\" 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\"\u003eCustom 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\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-LS100MT-Solar-Telescope-Manual.pdf?v=1777432309\" 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\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":51230515462429,"sku":"LSS-LS100MT-Premium","price":8113.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/LuntLS100MTSolarTelescopePremiumKit.jpg?v=1777668230","url":"https:\/\/davidastro.com\/fr\/products\/lunt-ls100mt-h-alpha-solar-telescope-premium-plus-kit","provider":"David Astro","version":"1.0","type":"link"}