Binford 4200 Camera Cooling System. Cutting and installing styrofoam insulation. Thermoelectric Peltier camera cooler project. Attempt #2.
When one is doing long exposures of the night sky, the camera's image sensor gets warm and the warmth causes pixel noise in the images. Keeping the camera cool reduces this problem and results in nicer photos. Here's some more info - including photos of how temperature affects image quality in this regard. ghonis2.ho8.com/rebelmod450d16c.html