Lunt LS80THa/B1800FTPT H-alpha Solar Telescope
  • Lunt LS80THa/B1800FTPT H-alpha Solar Telescope

Lunt LS80THa B1800 FTPT H-alpha Solar Telescope

The use of ED glass, in this particular Solarscope's objective lens, offers absolutely superb solar resolution.

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The Lunt LS80THa/B1800FTPT H-alpha solar telescope is an extremely high quality Solar Telescope - a precision aligned ED refractor with a fully unobstructed 80mm optical aperture and 560mm focal length. The use of ED glass, in this particular Solarscope's objective lens, offers absolutely superb solar resolution.

An internal etalon with air-pressure tuning adjustment, operated via a side-mounted ergonomic revolving handle allows for a <0.7 Angstrom bandwidth. This "Pressure Tuner" system allows a better Etalon adjustment than other systems. The "Pressure Tuner" system adapted the Etalon to varying altitudes and atmospheric pressures for optimal performance at all available wavelength.

This system's Blocking Filter is the B1800, which provides even less vignetting than the B1200 for imaging with larger format cameras. The star diagonal in which the blocking filter is mounted is equipped to take 1.25" eyepieces and also sports a T2 camera connection.

Fine adjustment is achieved with the excellent Starlight Instruments high-end focuser Feather Touch, featuring 10:1 dual fine and course focusing controls


    • Aperture: 80mm (ED refractor, unobstructed
    • Focal length: 560m
    • Bandwidth: internal Etalon with <0.7 Angstro
    • Tuning: air-pressure tuning syste
    • Blocking Filter: B1800 with 1.25" and T2 connectio
    • Focuser: Starlight Instruments Feather Touch with 10:1 reductio
    • Weight: 4kg


    • H-alpha Telescope with internal Etalon and 80mm Apertur
    • Pressure Tuner syste
    • 2" Starlight Instruments Feather Touc
    • Tube Ring with 1/4"-20 connection and dovetail plat
    • LUNT zoom eyepiec
    • Sol-Searche
    • Transport case

The telescope is upgradeable with the new DSII double-stack system. The optional DSII is a internal double stack module with "Pressure Tuner", that provides a bandwidth <0.5 Angstrom. In addition to the "Pressure Tuner" has the DSII module the advantage that there are no more Energy-Rejection-Filter installed, unlike front-mounted double-stack filters. The ERF are allready in the telescope. Therefore the sun's image is brighter and prominences can be better observed than with conventional double-stack systems.


Data sheet

Optical Design
Hydrogen Alpha (HA)
Focal Length
400 mm
Optical Tube Length (mm)
13 inch

Specific References

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