Lunt LS100MT H-alpha solar telescope, B3400 FT The LS100MT is Lunt's 100 mm universal day-and-night modular telescope, built on an FPL53 ED triplet. The internal Doppler True pressure-tuned etalon gives uniform H-alpha bandpass; with the solar module removed it is a 100 mm f/7 apochromatic refractor.
Manufacturer model: Lunt LS100MT H-alpha solar telescope, B3400 FT · Specifications checked against manufacturer data on 2026-11-03
The LS100MT is Lunt's 100 mm universal day-and-night modular telescope, built on an FPL53 ED triplet. The internal Doppler True pressure-tuned etalon gives uniform H-alpha bandpass; with the solar module removed it is a 100 mm f/7 apochromatic refractor.
Always use the telescope with its Lunt blocking filter in place; it is a dedicated solar instrument in H-alpha configuration.
| Telescope type | Universal day/night modular |
|---|---|
| Aperture | 100 mm |
| Focal length | 714 mm |
| Focal ratio | f/7 |
| Objective | APO triplet, FPL53, ion-assisted broadband AR |
| Etalon | Modular, Doppler True barometric pressure tuning; UV-grade fused silica |
| Etalon wavelength | 656.28 nm |
| Bandpass | <0.45 Å single stack |
| Other modes | CaK 393.4 nm (2.2 Å) and white light with optional filters |
| Maximum magnification | 175× |
| Mounting | CNC rings and Vixen-style dovetail |
| Weight | 5.8 kg (12.7 lb) |
| Blocking filter | B3400 blocking filter |
| Focuser | Dual-speed Feather Touch |
B3400 clear aperture not stated on Lunt spec pages. MT/Allround version (100 mm FPL53 triplet, 714 mm), not the 102 mm f/6.5 doublet Standard Kit OTA.
Data sheet
Lunt LS100MT H-alpha solar telescope, B3400 FT The LS100MT is Lunt's 100 mm universal day-and-night modular telescope, built on an FPL53 ED triplet. The internal Doppler True pressure-tuned etalon gives uniform H-alpha bandpass; with the solar module removed it is a 100 mm f/7 apochromatic refractor.
Manufacturer model: Lunt LS100MT H-alpha solar telescope, B3400 FT · Specifications checked against manufacturer data on 2026-11-03
