Spiral galaxy M101, Ursa Major
Total exposure of 2 hours 24 minutes, including 23 x 2-minute, ISO 3200 frames, taken 24 March 2020 (the other frames were from 2 sessions in 2017 and 2015).
I've had to crop the image more than I'd like because the camera orientation happened to be very different over the 3 the sessions, so the edges were very uneven.
Modified EOS 600D & Revelation 12" Newtonian f/4 reflector telescope.
Frames registered and stacked in DeepSkyStacker software; curves adjusted in Canon Photo Professional; noise reduction in CyberLink PhotoDirector.
Spiral galaxy M101, Ursa Major
Total exposure of 2 hours 24 minutes, including 23 x 2-minute, ISO 3200 frames, taken 24 March 2020 (the other frames were from 2 sessions in 2017 and 2015).
I've had to crop the image more than I'd like because the camera orientation happened to be very different over the 3 the sessions, so the edges were very uneven.
Modified EOS 600D & Revelation 12" Newtonian f/4 reflector telescope.
Frames registered and stacked in DeepSkyStacker software; curves adjusted in Canon Photo Professional; noise reduction in CyberLink PhotoDirector.