Lunt LS60MT Premium Kit

60mm Double Stack Modular Telescope — Maximum Contrast The LS60MT Premium Kit is the ultimate expression of the 60mm modular platform — combining Lunt's universal day/night architecture with a double-stack etalon system that achieves a combined bandpass of <0.28Å. At this contrast level through 60mm of premium FLP51 ED optics, the hydrogen-alpha chromosphere reveals structure and detail that single-stack instruments at this aperture cannot resolve. The double-stack architecture in the 60mm Premium is a hybrid system — and a technically interesting one. The internal etalon is pressure-tuned via Doppler True Barometric tuning, providing instant, precise bandpass control across the full field. The front-mounted LS50FHa etalon is tilt-tuned, adding the second bandpass element that narrows the combined system response to <0.28Å. Two independently controllable etalons, two different tuning mechanisms, working in series to produce chromospheric contrast that single-stack observers have to see to believe. Plage boundaries resolve into defined cellular networks. Filaments show internal threading and dark-core complexity. Prominences reveal structural detail from base to tip. The pressure tuner shifts the chromospheric view in real time; the tilt-tuner locks in the additional contrast needed to see what lies beneath the surface. The 6" Vixen dovetail — longer than the 4" on the Standard and Enhanced — provides the rail length needed to balance the system with the front-mounted DS filter in place. The B1200 blocking filter provides 12mm of clear aperture for imaging. The zoom eyepiece covers every magnification in a single twist. By night, remove the solar module and double-stack filter and the LS60MT is a premium 70mm f/6 FLP51 ED refractor with no compromises. Every unit is individually assembled, bench-tested, and individually verified before leaving Tucson. When Lunt states a specification, it is measured. KEY SPECIFICATIONS H-Alpha Aperture 60mm Native Aperture 70mm (FLP51 ED Doublet) Focal Length / Ratio 420mm f/6 (native), f/7 (H-alpha) Etalon System Dual: internal pressure-tuned (Doppler True) + front-mounted tilt-tuned (LS50FHa) Bandpass (Single Stack) <0.45Å — individually verified Bandpass (Double Stack) <0.28Å combined system — hybrid PT + tilt-tuned architecture Blocking Filter B1200 — 12mm clear aperture, imaging ready Focuser 2" R&P dual-speed 10:1, ZWO EAF compatible Eyepiece 7.2–21.5mm zoom — 7 elements, 15mm eye relief, 0.1% AR Finder SunLock red dot finder Dovetail 6" Vixen-style (extended for DS filter balance) Case Aluminum hard case with custom foam insert Weight ~9 lbs (OTA + DS filter) Night Use Yes — remove solar modules for 70mm f/6 FLP51 ED refractor