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My intention is to only get down to the +5* mark, not subzero temperatures. Icing should only be a minor issue at that level I think. Easy enough for me to insulate any exposed surfaces. I've currently got extra as I was not sure how I was going to support the finger externally so left width to add securing hardware. Easy enough to attack with the hacksaw and file.
Longer term I am seriously considering stripping the camera to basics. Read a thread where it was done, the real gain being to chuck away the rear screen or at least offset it elsewhere. The camera doesn't need it. With an external powr supply and permanent USB connection the TEC unit could then be hang off the back and the whole thing built into a cold box, sealed and argon filled.
Too many ideas, need to get this version working first. I keep watching out for cheap DSLRs to try other ideas and options.
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