Quote:
Scotts was also done at 22 degrees, which would be pretty close in result to the 20degrees
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For every 6 degrees rise in temperature the dark current approximately doubles, so 2 degrees is a significant increase. More important than ambient temperature is chip temperature, which can depend on how long the camera has been switched on, whether it has been actively capturing an image a reading it out (more reads / time = hotter chip) etc.