Hello,
M106 with ASI178MM. Sensor cooled down to 6.5°C due to a cold night. Humidity and city lights.
The focal length of 1200mm is too much for the tiny photosites.
Despite the light pollution, the faint external ring appears. A little bit of. With noise from processing and too few frames.
The 1200-mm FL telescope (10" newton) was guided with a 135-mm telelens and an ASI120mm.
Nicolas
Final, strongly reduced, LRGB:
A crop of sampling-scale of 20-s frames, stacked:
Unprocessed stack of 5 x 300s, no flat, one dark only, subtracted on the fly with SharpCap:
