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Here is a side by side comparison of a 400px crop from the center of the frames..
Ambient temp was 30 degrees C.
First frame: Camera was left on for 45min to allow it to reach operating temp then a 5min exposure at iso 1600 was taken.
Second frame: Peltier turned on after first exposure and left for 45min then a 5min exposure was taken..Ambient temp stayed pretty constant and within a degree or two..
I reckon a good 8-10 degree difference there..
cheers Gary
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