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Doug,
Wouldn't the CCD temperature be higher than ambient air temperature depending on the length of exposures and the frequency of images taken ?
On my DSLR there is a noticeable increase in temperature if I take lots of images and long exposures.
Also the temperature effects are much worse in the corner where all the readouts occur.
Whereas with a cooled CCD the excess heat is being removed constantly and you dont get the same variation across a CCD.
Thus I would have thought that a laser thermometer would work better - more awkward but at least its reading the temperature off the front surface of the CCD (with shutter open)
Not sure how you manage an imaging session though.
Cheers
Rally
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