Now with new-generation etalons — every unit individually tested on Lunt's precision metrology equipment. Every specification is verified, not estimated.

The LS100 Standard Kit brings maximum aperture to hydrogen-alpha solar observation. With 102mm of light-gathering power through a 663mm f/6.5 doublet objective, this telescope reveals solar detail that smaller instruments simply cannot match — finer prominence structure, more subtle filament threading, and greater contrast across active regions.

The internal pressure-tuned etalon delivers 0.45Å verified bandpass through Doppler True Barometric Pressure Tuning, allowing precise bandpass optimisation without mechanical tilt that can compromise image quality. The entire 102mm aperture delivers uniform performance from centre to edge. Dial in prominences at the limb, then instantly shift to surface detail with a twist of the pressure knob.

The integrated solar handle with built-in red dot finder transforms setup and transport for a telescope of this size. Carry it securely with one hand while the finder stays permanently aligned and ready. The 8" Vixen dovetail provides the rail length that 100mm optics demand for proper balance on equatorial and alt-az mounts.

What You'll See

One hundred two millimetres of aperture collects more than six times the light of a 40mm instrument. Structures that appear as soft textures in smaller scopes break apart into defined, detailed features. Prominences reveal internal threading, knots, and flow dynamics. Filaments show complex multi-strand structure with defined dark cores and sharp edges. Active regions display the full complexity of their magnetic architecture, from large-scale plage structure down to fine penumbral detail.

Pressure tuning at this aperture is extraordinary. The chromosphere becomes a three-dimensional landscape you can explore in real time. Shift through the hydrogen-alpha line and watch structures appear, evolve, and recede as you scan different depths of the chromosphere. The 19mm flat-field eyepiece provides approximately 35x magnification for comfortable full-disk views and limb surveys.

Why This Package

If you want the most detail the hydrogen-alpha chromosphere can reveal to a visual observer, aperture is the answer. The LS100 delivers 102mm of it with Doppler True pressure tuning across the entire field. The B1200 blocking filter with 12mm clear aperture provides solid field illumination for visual work, and the 2" dual-speed focuser with 10:1 fine focus and ZWO EAF compatibility gives you the mechanical precision that 100mm of resolving power demands. And like all Lunt 100mm systems, the Standard is fully double-stack capable — add the SFPT module at any time to bring combined system bandpass to <0.28Å.

Package Includes

• LS100 OTA: 102mm aperture, 663mm f/6.5 doublet objective. Internal pressure-tuned etalon (Doppler True Barometric), 0.45Å bandpass. Dedicated solar telescope.
• B1200 Blocking Filter: 12mm clear aperture. Proprietary filter stack for safe H-alpha observation.
• 2" R&P Focuser (10:1): Dual-speed with 10:1 fine focus reduction. ZWO EAF compatible for motorised focus control.
• Solar Handle w/ Red Dot Finder: Integrated tube ring assembly. Built-in solar finder stays permanently aligned. Secure one-hand carry and transport.
• 8" Vixen Dovetail: Extended rail for proper balance on equatorial and alt-az mounts.
• Hard Case: Aluminium hard case with custom-fit foam insert.
• 19mm Flat-Field Eyepiece: 1.25" barrel. 60° FOV. 0.1% AR coatings. ~35x on LS100.

Key Specifications

• Aperture: 102mm
• Focal Length: 663mm f/6.5
• Objective: f/6.5 Doublet
• Etalon Type: Internal pressure-tuned, Doppler True Barometric
• Bandpass: 0.45Å — individually verified
• Double Stack: Optional — add SFPT module → <0.28Å combined
• Blocking Filter: B1200 (12mm clear aperture)
• Focuser: 2" R&P dual-speed 10:1, ZWO EAF compatible
• Eyepiece: 19mm flat-field, 60° FOV, 0.1% AR — ~35x on LS100
• Night Use: Yes — remove solar module for 102mm f/6.5 refractor
• Telescope Type: Universal day/night modular