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 LS50THa Observer's Kit upgrades two things that matter most once you have spent time at the eyepiece: mechanical precision and magnification range.

The 1.25" Rack & Pinion focuser replaces the standard helical design with CNC-machined components, an integrated brake system that eliminates focus drift, and the load capacity to handle cameras and filter wheels when you are ready to image. The difference is immediate: smoother travel, positive lock, and the confidence that your focus point stays exactly where you set it.

Three flat-field eyepieces cover the magnification range you will actually use. The 8mm (44x) pushes in tight on active regions when seeing cooperates. The 12mm (29x) is your all-purpose solar eyepiece: enough magnification for surface detail with enough field to keep context. The 16mm (22x) pulls back for full-disk views and prominence surveys along the limb. All three feature 60° apparent fields and the same 0.1% AR coatings we apply to our etalons, minimizing ghost reflections in the narrow-band optical path.

What You'll See

Everything the LS50THa reveals at <0.65Å bandpass, now with the magnification range to explore it all. At 44x through the 8mm eyepiece, active regions resolve into intricate structures of light and dark, and prominence detail sharpens from soft arcs into defined loops and threads. At 22x through the 16mm, the full solar disk fills the field with context: you can survey the entire limb for prominence activity, trace filament paths across the hemisphere, and watch the slow evolution of active regions over the course of a session. Pressure tuning remains your most powerful tool. Scan through the chromosphere at any magnification. Watch structures appear and recede as you shift through the hydrogen-alpha line. Three eyepieces mean you are always observing at the right power for the conditions and the target.

Why This Package

This is the package for the observer who has caught the solar bug and wants to go deeper. The rack-and-pinion focuser is a permanent upgrade to your observing experience: once you feel the difference in mechanical precision, you will not want to go back. And three dedicated solar eyepieces mean you always have the right magnification without compromise. The B600 blocking filter provides the visual performance you need, and the system remains fully upgradeable. When you are ready for double-stack, the path is clear.

Package Includes

• LS50THa OTA w/ Clamshell: 50mm aperture, 350mm FL, f/7. Internal pressure-tuned etalon (Doppler True), <0.65Å bandpass. Unobstructed aperture. Integrated clamshell mounting base.
• B600 Blocking Filter: 6mm clear aperture, 1.25" diagonal. Proprietary filter stack for safe visual H-alpha observation.
• 1.25" Lunt R&P Focuser (1:1): CNC-machined aluminum/brass. 0.5" travel. Integrated brake with variable drag. Brass compression ring. 6-8 lb capacity. Replaces helical focuser.
• SunLock Red Dot Finder: Attached to clamshell. Red dot projection onto glass reticle. Safe solar targeting in seconds.
• 4" Vixen Dovetail: Attached to clamshell. Universal mount compatibility.
• 8mm Flat-Field Eyepiece: 1.25" barrel. 60° FOV. 0.1% AR coatings. 44x on LS50THa.
• 12mm Flat-Field Eyepiece: 1.25" barrel. 60° FOV. 0.1% AR coatings. 29x on LS50THa.
• 16mm Flat-Field Eyepiece: 1.25" barrel. 60° FOV. 0.1% AR coatings. 22x on LS50THa.
• Hard Case w/ Fitted Foam: Custom foam insert. Protection that travels.