does make a remarkable difference Bert. I am impressed with the cooling of the camera. You have a some interesting noise in the camera that shows up in the image, and upon subtraction has left some artifacts i nthe final image. But there is a huge difference between the raw image and the processed one.
Actally h0ughy I lied. The darks were taken at -10.7C and the light was at -12.3C hence the residual after subtraction. I just could not be bothered to do the darks again. Just shows how important it is to take darks at exactly the same temperature as lights. Thats why I swear By ICNR. I was manually controlling the fridge temperature. I am in the process of designing an electronic version. Pulse width modulation of one of the Peltiers should control the temperature adequately without any major sawtoothing. Peltiers also have a nasty property that if you lower the current you get a DROP in temperature for a delta time and then it rises again.
