Product Description

Now equipped with Lunt’s newer, higher-performing etalons, these telescopes deliver a tighter ≤0.35Å FWHM per etalon, improved from the previous ~0.55Å design. In double-stack configuration, system bandwidth drops to approximately 0.22Å for even greater contrast and finer solar surface detail.

The LS80MT Double Stack Premium Kit is the flagship 80mm package. The LS80MT features premium FPL53 ED glass with ion-assisted broadband AR coatings for exceptional contrast and color correction, equally capable for solar and nighttime observation. This is a fundamentally different telescope from the LS80: a modular, universal instrument built around a premium ED doublet objective.

The SFPT internal double-stack module reduces system bandpass to <0.50Å with dual independent Doppler True pressure tuners, giving you complete control over bandpass optimization. Two pressure-tuned etalons working in series, each with its own tuning knob, each responding instantly to adjustment. The result is sub-half-angstrom performance with the tuning flexibility that only dual pressure systems can provide.

What You'll See

At <0.50Å through 80mm of premium ED optics, the chromosphere reveals structure that single-stack instruments at any aperture struggle to match. Plage boundaries resolve into sharp cellular networks. Filaments show multi-strand complexity with defined dark cores. Active regions display their full magnetic architecture: penumbral detail, light bridges, and small-scale evolution visible in real time. Prominences show internal threading and flow patterns from base to tip with a clarity that rewards patient observation. By night, remove the H-alpha module and you have a premium 80mm f/7 ED doublet refractor. FPL53 glass delivers the color correction and contrast that serious observers demand for lunar, planetary, and deep-sky work. The same 2" dual-speed focuser. The same optical quality. A complete second telescope built into the one you already own. The 7.2-21.5mm zoom eyepiece provides continuous magnification from full-disk context to tight active-region crops without changing glass. Critical during sessions when conditions shift and you need to move between targets and magnifications without missing a moment.

Why This Package

SPECIAL OFFER: When purchased as part of this premium package, the SFPT internal double-stack module is included, making true double-stack performance accessible without compromise. Some competitors claim their tightest single-stack filters match double-stack contrast. We invite you to look through both and decide for yourself. The internal double-stack architecture means both etalons benefit from pressure tuning rather than mechanical tilt, maintaining perfect optical alignment across the entire bandpass adjustment range. Two independent tuners give you separate control over each etalon for maximum flexibility in dialing in the exact bandpass position you want. The B1800 blocking filter provides 18mm of clear aperture for full imaging capability. The 2" dual-speed focuser with 10:1 fine focus and ZWO EAF compatibility handles every accessory and imaging workflow you throw at it.

Package Includes

• LS80MT OTA: 80mm aperture, 560mm f/7 ED doublet. FPL53 glass with ion-assisted broadband AR coatings. Internal pressure-tuned etalon, <0.65Å bandpass. Modular design for day/night use.
• SFPT Internal Double Stack: Reduces system bandpass to <0.50Å. Dual independent Doppler True pressure tuners. Internal architecture maintains optical alignment across full tuning range.
• B1800 Blocking Filter: 18mm clear aperture. Full-frame sensor coverage. Optimized for imaging and wide-field visual.
• 2" R&P Focuser (10:1): Dual-speed with 10:1 fine focus reduction. ZWO EAF compatible for motorized focus control.
• Solar Handle w/ Red Dot Finder: Integrated tube ring assembly. Built-in red dot finder stays permanently aligned.
• 5.5" Vixen Dovetail: Black anodized aluminum. Universal mount compatibility.
• Hard Case (80/100mm): Aluminum hard case with custom-fit foam insert.
• 7.2-21.5mm Zoom Eyepiece: Variable FL. 1.25" barrel. 7 elements/4 groups. 0.1% AR coatings. 15mm eye relief. 53°-40° FOV. Near-parfocal.