Lunt LS80MT Premium Kit

80mm Double Stack Modular Telescope — The Flagship 80mm The LS80MT Premium Kit is the finest 80mm solar telescope Lunt makes. It brings together premium FPL53 ED doublet optics, an internal double-stack etalon system with dual independent Doppler True pressure tuners, and Lunt's new-generation etalons — delivering a combined system bandpass of <0.28Å. At this bandpass through 80mm of premium ED optics, the chromosphere reveals a level of detail and contrast that single-stack instruments at any aperture struggle to match. The objective is where the Premium distinguishes itself from the Standard and Enhanced. The FPL53 ED doublet — with ion-assisted broadband anti-reflection coatings — delivers exceptional color correction and contrast across both solar and night-sky wavelengths. At the H-alpha line, premium optics translate into sharper chromospheric structure, finer filament definition, and the contrast needed to reveal subtle features. At night, remove the solar module and the LS80MT becomes a premium 80mm f/7 ED refractor for lunar, planetary, and deep-sky work of genuine quality. The same FPL53 glass. The same ion-assisted coatings. A complete second telescope. The internal SFPT double-stack places two independently pressure-tuned etalons in series, each with its own Doppler True tuning knob. This is not a passive system — it rewards deliberate, engaged tuning. Adjust each etalon independently to optimize for prominences, surface filaments, or active region structure. The combined result is a <0.28Å system bandpass verified on Lunt's precision monochromator. At this contrast level, plage boundaries resolve into cellular networks, filaments show complex multi-strand architecture, and prominences reveal internal threading that single-stack instruments render as smooth, featureless arcs. The B1800 blocking filter provides 18mm of clear aperture for full-frame imaging. The 7.2–21.5mm zoom eyepiece covers the full magnification range in a single twist — from full-disk surveys to maximum-resolution detail without changing glass. Every unit is individually assembled, bench-tested, and individually verified before leaving Tucson. KEY SPECIFICATIONS Aperture 80mm Focal Length / Ratio 560mm f/7 Objective FPL53 ED Doublet — ion-assisted broadband AR coatings Etalon System Dual: internal pressure-tuned + SFPT internal double stack Tuning Dual independent Doppler True Barometric pressure tuners Bandpass (Single Stack) <0.45Å — individually verified Bandpass (Double Stack) <0.28Å combined system — individually verified Blocking Filter B1800 — 18mm clear aperture, full-frame compatible 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 Solar handle with integrated red dot finder Dovetail 5.5" Vixen-style Case Aluminum hard case with custom foam insert Night Use Yes — remove solar modules for 80mm f/7 FPL53 ED refractor Lead Time 90 days (individually assembled and bench-tested)