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I've got a plastic clip on lid lunch box about 200 x 150 x 100 deep. I've cut a hole in the bottom that is a neat fit on the camera's t-ring. I've stuck a small thermometer on the inside of the lid. drilled small holes for the camera's power and intervalometer cables in each side of the box.
Mount the box with the 200mm dimension horizontal. Lay a flexible
frozen cold pack in the box and put the lid on. Experiment with how long is needed to get x amount of cooling before commencing imaging. Also
see how much of a problem condensation on the sensor might be.
Might work, might not. Being as I don't take separate darks, and leave
the camera to do it, it won't matter if the temp fluctuates.
raymo
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