No pictures yet, but I have implemented a number of features on the MK5 prototype (1000D), in preparation for the
battery grip housing - waiting on the boards to arrive. Besides tightening up and smoothing cooling control and increasing the resolution of the temperature sensors, it now has an OLED displaying a bunch of very useful data. I can finally see what's going on. The lens dew heater is now controlled by switching through a MOSFET.
A word on dew control. I have had to think outside the square, because I wanted to avoid dismantling the camera any more than I felt necessary, to attempt major sealing modifications - it's just a DSLR with moderate, but perfectly adequate cooling capability, spending most of its time operating at -5C.
I have employed four basic strategies for the prevention/control of condensation;
1. Provide a small external area of cooled metal exposed to the air, close to the point where the cold finger enters the camera; that is, the back of the metal plate that clamps the cold finger, TEC, heat sink assembly.
2. Seal electronics in areas of significant cooling, as a safeguard; that is, the PCB attached to the sensor.
3. Fit a small nichrome wire heater element to the periphery of the sensor face. The prototype output is currently fixed, but can be variable with the use of a humidity sensor.
4. Dew strap/straps strategically located on the camera lens. Lenses are typically not weather proofed and the base of the lens tends to cool in contact with the camera, which gets quite cold.
Insulating the camera body is an exercise briefly explored with 5mm neoprene, but I found it promoted condensation and complicated handling. Clear shrink wrap might be an option?
Anyway, the methods above do not require major modification of the camera and work surprisingly well.