Heat is one of the worst enemies of imaging chips. I do not have a rig to keep my DSLR cooled down, and it was VERY hot the night that I imaged the Cocoon Nebula. There was a significant amount of noise in each of the subs. I removed a lot of the noise, but I think that the overall image quality suffered pretty terribly.
|IC 5146 (Cocoon Nebula) and Barnard 168|