Lunt LS50THa Standard Kit

LS50THa Standard Kit : 50 mm H-Alpha solar telescope with adjustable pressure

Visit LS50THa Standard Kit is the most popular H-Alpha solar telescope in the Lunt range. Designed to offer high-precision solar observation at an affordable price, it combines an unobstructed 50 mm aperture with an internal pressure-adjustable Doppler True etalon system.

Thanks to its 0.6 Å bandwidth, this telescope accurately reveals the protuberances, filaments and active regions of the solar chromosphere. Compact and lightweight, weighing in at just 3 lbs, it's the ideal solution for nomadic, everyday solar observation.

Pressure-Tuned technology: dynamic exploration of the chromosphere

The main advantage of the LS50THa Standard Kit lies in its system Pressure-Tuned Doppler True. Unlike conventional tilt tuning, pressure tuning acts uniformly across the entire standard, allowing different areas of the H-Alpha line to be scanned with great precision.

Simply adjust the thumbwheel :

• The protuberances become brighter in the blue wing
• Surface details gain in contrast in the red wing
• Chromospheric structures appear with remarkable depth

This technology transforms solar observation into a truly three-dimensional exploration of the chromosphere.

A spectacular view of the Sun in H-Alpha

The LS50THa enables you to observe the Sun's most impressive phenomena in detail:

• Giant protuberances suspended in space
• Dark filaments crossing the solar disk
• Active regions rich in magnetic activity
• Eruptions and rapid changes to the solar surface

The included 12 mm flat-field eyepiece provides 29x magnification, perfect for detailed observation of solar structures.

Compact, portable design

With a focal length of 350 mm and an f/7 focal ratio, the LS50THa offers an excellent balance between compactness and performance. The integrated clamshell system simplifies mounting on an astronomical mount or photo tripod.

The SunLock solar finder provides fast, safe alignment thanks to its red dot projection on a glass reticle.

Scalability with Double Stack system

Like all Lunt 50 mm systems, the LS50THa Standard is compatible with the new-generation LS50C double-stack filter.

The addition of this filter reduces the combined bandwidth to around 0.30 Å, considerably enhancing the contrast of surface details and chromospheric structures.

Complete kit contents

• LS50THa OTA with clamshell : aperture 50 mm, focal length 350 mm, f/7, internal standard Pressure-Tuned Doppler True, bandwidth 0.6 Å, unobstructed aperture
• B600 blocking filter : 6 mm clear aperture, 1.25″ elbow return, H-Alpha safety filter
• Helical eyepiece holder : 1.25″ format, integrated into the optical tube, smooth, precise focusing
• SunLock solar finder: attached to the clamshell, red dot projection on glass reticle
• Vixen 4″ dovetail: clamshell-mounted, universal frame compatibility
• Flat-Field 12 mm eyepiece : casting 1.25″, apparent field 60°, AR treatment 0.1 %, magnification 29x
• Hard case with foam : custom-cut interior foam for optimum protection

Summary table of technical specifications

Why choose the LS50THa Standard Kit?

The LS50THa Standard Kit is one of the best gateways to high-quality H-Alpha solar observation. Its Pressure-Tuned system offers a unique immersive experience, allowing you to explore the chromosphere with depth and precision. Compact, scalable and easy to use, it's ideal for both enthusiastic beginners and experienced observers looking for a portable, high-performance solar instrument.