Quote:
Originally Posted by [1ponders]
Steven; I thought about cosmic ray strikes but for a single image there are plenty of them and they are very clumped together. I agree I should collect multiple darks and median combine them, but I wasn't out for serious imaging last night, it was more of an equipment shakedown so just used the easiest method available.
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Why don't you post the dark image? I've had light and dark images rained upon by cosmic rays. If the cosmic ray hits the chip perpendicular the resultant charge can spill over into adjacent pixels resulting in the clumping effect.
The other possibility albeit faint is that your peltier cooler was running at 100% when taking the dark.
Regards
Steven