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Exhaust porting is going to be important if your airflow cooling. Ducting through the slot behind the sensor might work, using the 'normal' cold finger exit on the left (assuming a 450D). I have some small scroll blower fans that I have used for PWM cooling ($4 on ebay.
Very quite, low vibration. I also have some laptop pancake fans and cold fingers that could be 'modified' to use in a dslr.
Dust will be a concern, or stopping it from getting into the sensor area. Any airflow pushed in there is going to have the ability to carry tiny specs of dust that could get on the sensor, cover glass, etc. Filtration would be required IMHO.
Why not just run an internal cold finger without a TEC? A good external heatsink/fan (and it could be small) would hold the sensor at ambient and be a very low power solution.
Will be watching your development.
Good luck.
Last edited by glend; 17-11-2015 at 09:43 AM.
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