Quote:
Originally Posted by Kunama
Yes and no, the relationship changes somewhat due to 'reciprocity failure' with long exposure times but essentially that is correct.
CCD imaging is not my strong point so I don't know if there are differences in the relationship changes.
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Reciprocity failure is not generally refered to in CCD photography. Dark current in the camera may cause a similar phenomena however we usually keep that to a minimum with cooling.