Our old friend the Bubble Nebula in Cassiopeia again, this time on the society’s 20″ with the ATIK 383L camera.
By the time I was imaging this, it was almost at the zenith with all the issues that brings when using the Alt/Az dobsonian. Can anyone say ‘field rotation’?
This image is a stack of 30 second LRGB frames. Luminance are binned 2×2 and the colours 4×4.
