Lunt 40mm LS40THa/B1200 Dedicated Hydrogen-Alpha Solar Telescope with 1200 Blocking Filter

Sometimes, a little scope can surprise you with just how far it can go—especially when it's equipped for high-end performance. The Lunt LS40THa/B1200 may be the smallest dedicated hydrogen-alpha solar telescope in the lineup, but with the oversized B1200 blocking filter, it becomes a serious tool for advanced visual observers and solar imagers alike.

If you're looking for a compact H-alpha scope with an exceptionally wide, fully illuminated field—and the flexibility to accommodate large eyepieces, binoviewers, or small-format solar cameras—the LS40THa/B1200 delivers performance that far exceeds expectations.

A Full-Fledged Solar Telescope That Fits in Your Hands
This isn’t a converted night scope or a filtered white-light workaround. The LS40THa is a dedicated hydrogen-alpha solar telescope designed for safe, full-disk viewing of the Sun in H-alpha light. With a 40mm aperture and 400mm focal length, it’s tuned for sharp surface detail and crisp limb structures—perfect for tracking solar activity, prominences, filaments, and sunspots in real time.

Why Choose the B1200 Blocking Filter?
The B1200 offers a 12mm clear aperture—more than double the size of the B500 and twice the diameter of the B600. While that may seem oversized for a 40mm telescope, it gives you maximum flexibility for high-power visual work, binoviewing, and even solar imaging with a range of camera sensor sizes. A larger blocking filter ensures a wider, fully illuminated field at the focal plane, which means no vignetting even with longer eyepiece field stops or additional accessories.

It’s the top-tier option for users who want to get every last drop of performance out of this pint-sized powerhouse.

Tilt Tuning Made Simple
The LS40THa uses a tilt-tuned etalon to allow for precise control of the hydrogen-alpha bandpass. With a quick adjustment, you can emphasize surface detail, enhance prominence contrast, or find the sweet spot for active region visibility—all without any complicated setup.

Portable, Powerful, and Ready to Travel
At under 15 inches long and weighing just 2.6 pounds, the LS40THa is built to travel. Whether you’re stepping outside during your lunch break or bringing it to a remote observing site, this telescope sets up quickly and safely delivers stunning daytime views wherever the Sun is shining.

Important Safety Warning:
Never look at the Sun through this telescope—or any telescope—without the hydrogen-alpha etalon and blocking filter properly installed. Permanent eye damage or blindness will result. The telescope must be used exactly as designed for safe solar observing.

A Small Scope with Serious Ambition
The LS40THa/B1200 is the solar telescope for observers who want big performance in a small, reliable package. It’s a perfect solution for advanced visual use and entry-level solar imaging—and an excellent companion to larger H-alpha systems or nighttime setups.

What’s Included:

• Lunt LS40THa 40mm dedicated solar telescope

• Internal tilt-tuned hydrogen-alpha etalon

• B1200 blocking filter in 1.25" diagonal

• 1.25" helical rear focuser

• Objective cover

• Foam-lined storage box

Tech Details: