LUNT Solar Systems LS80THa/B1800CPT with blocking filter, 2" Crayford focuser and Pressure Tuner
Complete H-alpha Solar telescope with 80mm diameter and a bandwidth of less than 0.7A.
what is delivered with the equipment?
- H-alpha telescope with internal Etalon filter and 80mm diameter
- Pressure Tuner adjustment
- 2" Crayford focuser
- B1800 blocking filter built into the 1.25" diagonal
- 1/4"-20 threaded attachment ring for tripod attachment
- Sol Searcher solar searcher.
- Carrying case
These instruments with their 80 mm aperture and 560 mm focal length provide a very detailed resolution of the sun's surface. With a weight of approximately 4 kg, most photographic tripods can easily accommodate it. The filter systems are well integrated into the tube and provide a bandwidth of The set of lenses and filters integrated into the instrument are perfectly aligned and are fully corrected for coma, astigmatism and chromatism, providing a flat image over the entire surface .
Atmospheric pressure varies, depending on whether you are at sea level or on top of a mountain. Unfortunately, standard solar filter systems respond to these variations in atmospheric pressure. The wavelength range allowed by the filters varies as a function of atmospheric pressure. This shift is minimal, but for bandwidths of less than one Angstrom it is clearly visible. If the filter is not precisely tuned to the H-alpha wavelength, the image of the Sun is degraded, and bumps and surface details are no longer visible.
Therefore, the solar filter system must be adjusted to the prevailing atmospheric pressure at the observation location .This so-called "Tuning" adaptation is achieved by slightly tilting the solar filter. Thus, the filter is not completely correctly aligned with the beam, it is slightly oblique, so there may be optical problems (lack of details...).
The new "Pressure Tuner" system is a different process: the solar filter will not be tilted just to simulate an atmospheric pressure balance, but the air pressure in the filter system is actually 100% adapted to the real atmospheric pressure .Subsequently, the air surrounding the filter can simply be compressed or decompressed using the "Pressure Tuner" system to change the pressure between the surfaces. This allows the filter surfaces to always remain at the same angle, but changes the air pressure with great precision. Therefore, the "Pressure Tuner" system gives much better results than tilt systems.
LUNT Solar Systems LS80THa/B1800CPT with locking filter, 2" Crayford focuser and Pressure Tuner
