This is my forth Andromeda. This time, I finally started to use special software to stack many photos in 16 bit format. Therefore, I finally started to stack good enough numbers of photos to make this shot. I took about 800 shots and deleted 600 of failed shots (vibration), and stacked all the good ones.
Equipment: Nikon D300, Nikkor AF 300mm f/4 ED, EM5-D2M equatorial mounting, wood custom, dovetail mount, Bahtinov mask for focusing
Setting: 300mm, f/4, 16 sec x 199 shots (53 min), ISO-800, 12 bit Raw
IRIS software used for: Flat, Dark, align, and stack