Lunt MT Series Universal Refractor Telescope
Night Sky Refractors Ready For Solar Upgrades
The Lunt MT series gives you a night sky refractor first and a solar platform second. Each optical tube assembly is an f/7 apochromatic refractor built on precision aligned ED glass, and each one ships ready to accept a Lunt hydrogen alpha module later. You choose the aperture, then decide when to add the solar side.
Four apertures cover the range. The 70mm works at 420mm focal length, the 80mm at 560mm, the 100mm at 714mm and the 130mm at 910mm, so every tube holds the same f/7 focal ratio. Smaller tubes stay travel friendly at around five and a half pounds, while the 130mm delivers the most resolution for deep sky imaging.
A dual speed 10:1 rack and pinion focuser handles fine adjustment, and a ring or clamshell assembly with a Vixen style dovetail lets you mount on standard saddles. When you want the Sun, swap the focuser for a Lunt hydrogen alpha module and blocking filter and the same tube reaches 0.7 Angstrom bandwidth or tighter. A fitted hard case protects the tube in transit.
Key Features
- F/7 Across The Range - keeps the same focal ratio at 70mm, 80mm, 100mm and 130mm, so accessories and exposure habits carry over between tubes.
- ED Apochromatic Optics - uses precision aligned extra low dispersion glass, with FPL51 in the 70mm and FPL53 doublet and triplet designs in the larger apertures.
- Day Or Night Conversion - accepts a Lunt hydrogen alpha module, calcium K module or white light wedge in place of the focuser, then returns to night use in minutes.
- Dual Speed Focuser - provides a 10:1 rack and pinion feed for repeatable focus on planets, star fields and solar detail.
- Mounting Hardware Included - ships with a ring or clamshell assembly and dovetail, so the tube drops onto a standard Vixen style saddle.
- Hard Case Storage - travels in a hard case with custom cut foam that leaves room for modules and accessories.
| Specifications | |
|---|---|
| Model / SKU | LS70MT-OTA, LS80MT-OTA, LS100MT-OTA, LS130MT-OTA |
| Type | ED apochromatic refractor optical tube assembly, solar upgradeable |
| Clear Aperture | 70mm, 80mm, 100mm or 130mm depending on model |
| Focal Ratio | f/7 on all four apertures |
| Focal Length | 70mm is 420mm, 80mm is 560mm, 100mm is 714mm, 130mm is 910mm |
| Objective Glass | FPL51 ED doublet on the 70mm, FPL53 ED doublet on the 80mm, triplet ED APO with FPL53 on the 100mm and 130mm |
| Focuser | 2 inch dual speed 10:1 rack and pinion |
| Solar Compatibility | accepts Lunt hydrogen alpha modules and pressure tuners, Ca-K modules and white light wedges with the correct blocking filter |
| Bandwidth In H-alpha Configuration | 0.7 Angstrom or better single stack, 0.5 Angstrom or better with a double stack etalon |
| Tuning | Lunt Pressure Tuning shifts the passband on and off band without tilting the etalon |
| Mounting | ring or clamshell assembly with Vixen style dovetail |
| Weight | 70mm 5.5 lb, 80mm OTA 16 lb, 100mm 25 lb, 130mm listed by Lunt at 30 kg |
| What's Included | optical tube assembly, dual speed focuser, 2 inch to 1.25 inch reducer, ring or clamshell assembly with dovetail, hard case with fitted foam |
| Warranty | 5 years from date of purchase against manufacturing and workmanship defects |
Talk to a Specialist