I have noticed light areas in my light files and decided to take a dark to see if the light is in it as well. This is a 20 minute dark, taken at -15 degrees. The image is stretched to show the light patches I see in my lights.
Has anyone seen this before? I have not been using darks with my images but to remove the light patches I tried one last night. The dark removed the light patch but added noise to the image. All shots were at the same temp.
Can't think of any light leak. Normal 2 inch nose piece for the camera mounted on a AT65EDQ scope. Lodestar guider added to the guide port. I will remove the guide scope to be sure and shoot another dark.