Lunt 60 / 50mm Double Stack H-Alpha Telescope / Crayford / Pressure Tuner

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, B1200 blocking-filter, and Crayford focuser.

This telescope will be delivered with two matched Etalons, a internal Etalon and an 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 in the suns chromosphere 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 are 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.

Technical Data:

Aperture: 60 mm using internal etalon, 50mm with double stack

Focal length: 500 mm

Bandwidth: Internal Etalon with <0.7 Angstrom. <0.5A when combined with front 50mm Etalon

Tuning: Air-pressure tuning system

Blocking Filter: B1200 with 1.25" and T2 connection

Focuser: Crayford style with 10:1 reduction

Weight: 3.8 kg With front etalon fitted

Length: 47 cm With front etalon fitted