This is a combination of 20 images, each of 30 seconds The images were taken with a Alta-U16MD7D9 attached to an OGS 20" F/8.1 telescope. This used 2x2 binning. Each of the images was corrected with a dark frame and a flat field.
I am still playing with the U16 on the OGS. In particular, I am concerned about flat fielding the images (since there seems to be a lot of reverse vignetting). Here you can see the glow at the corners and some residual dust bunnies.
In fact, it seems like some of the dust bunnies on the chips as I move the telescope