Quote:
Originally Posted by PRejto
The only way temperature compensated focusing can work is if the change in focus is linear over the range of temperature you hope to image in. And, the only way to find out is to actually graph the focus change vs temperature to confirm.
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Wouldn't the change in focus just need to be reproducible? Even if non-linear you could still compensate based on its previous non-linear behavior. In practice I don't know if this is how the various software packages work though, plus it may be easier to just have a certain change in temperature trigger an autofocus cycle.