Lunt Solar Systems LS130MT Day and Night Modular Professional Telescope - 130mm Aperture Refractor Astronomy Kit Review (2026)

What the modular design does

The LS130MT is built around a 130mm aperture, roughly 910mm focal length refractor, and its defining feature is that the same optical tube can switch between a dedicated hydrogen alpha solar telescope and a standard nighttime astronomical refractor. During the day, an internal pressure tuned etalon module filters the incoming light to a narrow band centered on the hydrogen alpha wavelength, which is what reveals fine solar detail such as prominences and surface structure that a plain white light filter cannot show. Remove or reconfigure that solar module and the same 130mm objective becomes a night time refractor suitable for the moon, planets, and deep sky targets, which is the versatility the Day and Night name refers to.

Optical and mechanical specifications

Lunt lists the objective as an FPL51 extra low dispersion triplet with ion assisted broadband anti reflective coatings, paired with a 2 inch dual speed rack and pinion focuser that offers a 10 to 1 fine focus reduction for precise focusing on both solar detail and night time targets. The focuser is also compatible with Lunt's own electronic focus motor for remote or automated operation. The tube mounts to equatorial or alt azimuth heads through a 12 inch Vixen style dovetail bar, and a dedicated solar handle with an integrated, permanently aligned red dot finder helps locate and track the sun safely without needing to sight down the tube toward it directly.

Weight and handling

A complete kit in this class runs in the neighborhood of 25 pounds for the optical tube assembly alone, which is substantially heavier than a typical 100 to 130mm nighttime only refractor of similar aperture because of the added etalon housing and internal solar hardware. That weight means the telescope needs a sturdy equatorial or alt azimuth mount rated well above its own mass, and it is not a grab and go instrument for spontaneous sidewalk astronomy. Buyers moving up from a lighter beginner refractor should plan on a mount upgrade alongside the telescope itself if they do not already own one capable of carrying this much weight steadily.

Who this telescope is built for

Lunt Solar Systems specializes in dedicated solar instruments, and the LS130MT sits at the professional end of that lineup, aimed at experienced solar observers, outreach programs, or imagers who want both fine hydrogen alpha detail on the sun and a genuinely capable night time refractor without owning two separate telescopes. It is not aimed at someone buying their first telescope or their first solar filter, since the cost of a kit like this is far beyond a simple white light filter sheet or a compact solar scope, and the modular system also depends on the correct Lunt filter modules being installed correctly every time the telescope switches between day and night use.

Value considered against the alternatives

Compared with a simple white light filter on a standard refractor, or with Lunt's own smaller and less expensive solar telescopes, the LS130MT delivers noticeably more aperture and the added convenience of night time use from the same tube, which is a real advantage for someone who wants to minimize the number of instruments in their kit. That said, the price puts it firmly in professional or serious enthusiast territory rather than the range most casual sun watchers or eclipse chasers would consider, and the day to night switch still requires handling and storing the correct solar hardware carefully. Anyone comparing it against a dedicated eclipse filter or an entry level solar scope should expect to pay a large premium for the added capability.

Frequently asked questions