Solar Imaging Session - November 27, 2019

The sky this afternoon is cloudy but as it nears sunset time, the sky opens up a bit so I use this opportunity to test image the Sun in preparation for the upcoming December 26, 2019 Annular Solar Eclipse using my very old Thousand Oaks Type 3 using a Celestron C90 Maksutov-Cassegrain at prime focus of f/13.8 with Canon EOS M6 mirrorless camera. The image scale of the Sun is huge in this setup as the C90 has a native 1250mm focal length and adding it to a APS-C crop sensor camera, the focal length increased to a 35mm equivalent of 2000mm f/13.8! At this focal length,the Sun almost fills up the entire field of view. I use a Nexstar motorised altazimuth mount to lock the Sun in the field of view. The Sun was imaged using a Canon EOS M6 mirrorless camera on Celestron C90 f/13.8 Maksutov-Cassegrain at 1/1000sec with Thousand Oaks solar filter.