Originally posted by Digitalis Peltier effect cooling? on its own, it is notoriously inefficient and wasteful of energy. And you still have to get rid of the heat through some other means.
Semiconductor junctions are good for a lot of things, so it is a form of Peltier effect, even though it's billed as solid-state refrigeration, but the idea is simply to get the heat away from the sensor and out to the atmosphere. The problem for the sensor with regard to heat build-up is that it's buried under several layers of apparatus, including the LCD screen, but complicated when IBIS is used. A fixed sensor has a chance of using thermally-conductive materials to take the heat away, but the moving sensor platform with IBIS doesn't allow that. Cooling fans applied directly to the sensor bring complications of their own.