SUMMARY
Coronado's iconic PST 40mm f/10 0.5Å H-Alpha Personal Solar Telescope optical system is tuned to the hydrogen-alpha bandwidth with a 0.5Å (Angstrom) bandpass for viewing details of the Sun's chromosphere (surface) and prominences. A bandpass tuner allows users to compensate for Doppler shift or to highlight specific areas or zones.
It is designed and engineered to be set up quickly and used easily. The 40mm external etalon has an easy-to-use tuning ring, while the 30mm etalon primary blocking filter is set internally, so all users need do is mount the OTA on a stable platform and drop in the included 20mm eyepiece. The PST is offered here without a mount or tripod, but it is equipped with a standard 1/4"-20 tripod mount for using conventional photo/video/field tripods, or it can be mounted on many alt-az, EQ, or motorized astronomical mounts.
HIGHLIGHTS
- Optical Performance
- 40mm aperture
- f/10 focal ratio
- 400mm focal length
- Simple focusing ring with 1.25" eyepiece holder
- Eyepiece set at 90° to optical tube puts head in a comfortable viewing position when aimed at or near the zenith
- Solar Blocking
- 40mm external tunable etalon
- 30mm internal etalon primary blocking filter
- 0.5Å bandpass
- -0.005Å/C thermal stability
- Tuning ring for external etalon allows for Doppler compensation to improve contrast and highlight specific areas/zones
- Tuned for the hydrogen-alpha bandwidth with improved surface contrast and views of prominences
- Included Eyepiecs
- 1.25" diameter barrel
- 20mm focal length yields 20x magnification
- Fold-down rubber eyecup for use with or without eyewear
- Mounting
- Mount and tripod required
- 1/4"-20 mount for using conventional photo, video, or field tripod
