Just for fun on a poor seeing night, 3rd Oct - 1/4 moon, heavy dew & patchy clouds. I figured I'd have a little fun. I tried a range of gain values and let NINA's exposure calculator guide me on exposure, basically 3-5 times recommended.
These are all experiments and no effort was made to "get" an image, basically to see what all the fuss was about, and now I see
ASI1600MC-c calibrated with darks, flats & dark flats.
Unity gain for reference is 139. 300 is considered the max
Cat's Paw: 45mins of 15s @ 350g (Zwo dual band filter) the moon was shining almost right down the scope :/
Sculptor Galaxy: 45mins of 10s @ 250g (UV/IR cut)
The Great Barred Spiral Galaxy: 44mins of 30s @ 350g (UV/IR cut)
Triangulum Galaxy: 17mins of 10s @ 350g (UV/IR cut)
Andromeda: 8mins of 10s @ 300g (UV/IR cut)
There is some indication in the file names as to how I tortured them in PI.
Mostly Photometric Colour Calibration, Dynamic Background extraction x2 division & subtraction, ez Denoise, ez Soft Stretch and a little contrast and saturation curve.