M31 - The Andromeda Galaxy
From the author of Welcome to the Universe in 3D
19:51 EST Nov 22, 2022.
ZWO ASI2400MC-Pro with L-Extreme filter on 10" RC at f/9.
75 mins (in 30 seconded unguided increments)
ColSat and Curves.
20:17 EDT Oct 26, 2008.
Starlight Express SXV-H9 on 4" Tak FSQ refractor at f/5.
L = 80 min, R = G = B = 40 min (unguided 2-minute subexposures).
Richardson-Lucy deconv, curves.
20:49 EDT Sept 21, 2020.
Starlight Express SXV-H9 on 200mm Vivitar telephoto lens.
L = 88 min, R = G = B = 20 min (guided 1-minute subexposures).
Gamma stretch, unsharp mask, denoise.