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Having just got a cool box from Peter - I find I can do DSLR shots between 1200 to 1800 secs no problems now. I set the TEC to 3-4 degrees, which means the Camera chip reports around 8 degree to BackYardEOS.
I am pondering if I should go lower? The set point was to avoid dew, but if the camera is a constant heat source that's adding say +4 degree to the TEC - should I am for more aggressive cooling?
At 2400 seconds on a dark frame I can start banding of thermal current.
I am not surprised a cold finger produces such stellar results - well done!
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