Lunt LS60THaDS50/B600CPT H-alpha solar telescope
  • Lunt LS60THaDS50/B600CPT H-alpha solar telescope

Lunt LS60THaDS50/B600CPT H-alpha solar telescope

Complete H-alpha solar telescope with 60mm aperture and additional 50mm double-stack filter system. The telescope can be used with <0.7 Angstrom bandwidth or with <0.5 Angstrom bandwidth.
With advanced air-pressure tuning system, B600 blocking-filter, and Feather-Touch focuser.

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This telescope will be delivered with two matched Etalons, a internal Etalon and a external. The LS60THaDS50 could be used only with the internal H-alpha filter at <0.7 Angstrom and a aperture of 60mm, or together with the front mounted external H-alpha filter at <0.5 Angstrom bandwidth and 50mm aperture.

By reducing the bandwidth from estimated 0.7 Angstrom to 0.5 Angstrom more details on the solar surface will become visible. Adding a second Etalon to an existing Etalon is not quite as simple as it may seem. Both Etalons need to be brought on line (matched) and both need to be adjustable (Tuning) such that all ghosts images could be eliminated. Ideally the transmission curves should overlap perfectly when on band to provide for the best possible resolution and contrast. Both etalons in this system will be matched at the factory in order to provide a system that is both optimized for performance and the elimination of ghosting.

The internal Etalon of the telescope is equipped with the advanced air-pressure tuning system “Pressure-Tuner”. The Etalon of the external double-stack filter is provided with mechanical tilt-tuning system.

Blocking-filter is the B600. The B600 is good for visual solar observing. Also solar imaging is possible by cameras with small CCD chip. We recommend a LS60THa with B1200 blocking-filter by using cameras with middle or large sized CCD chips.
The star diagonal in which the blocking filter is installed, is equipped as standard for 1.25" eyepieces and with a T2 camera connection.

Fine adjustment is achieved by a 2" Starlight-Instruments Feather-Touch focuser with 1.5" travel and 10:1 reduction.

Aperture: 60mm or 50mm
Focal length: 500mm
Bandwidth: <0.7 Angstrom or <0.5 Angstrom
Tuning internal Etalon: air-pressure tuning system
Tuning double stack filter: tiltable Etalon
Blocking-filter: B600 with 1.25" and T2 connection
Focuser: Starlight-Instruments Feather-Touch focuser with 10:1 reduction
Tube-ring with 1/4-20 tapped base (standard thread for photo-tripods)
Weight: 3.8kg
Length: 47cm
LS60THa H-alpha telescope with internal Etalon, and 60mm aperture
Internal Etalon with Pressure Tuner system
External 50mm double-stack Etalon LS50FHa
B600 blocking-filter in star-diagonal
2" Feather-Touch focuser
Tube ring with 1/4-20 connection for mounting on photo-tripods
Transport case
Instruction manual


Data sheet

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

Specific References

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