Quote:
Originally Posted by gregbradley
Not sure if this is matching your question but the focus position of an FSQ will constantly shift with temperature change. So you would not expect it to remain the same. FSQ is well known to be sensitive to temperature changes. 1C change requires a refocus. Also the step sizes on Robofocus are rather large.
Greg.
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True, but it won't shift a lot compared to an incorrect backlash offset over a quick 30 point v-curve test. Each point will end up incorrectly off-set and the drift will be heavily amplified over the 30 points (30x offset error). The temp shift in comparison would be negligible, especially with 9micron pixels given the sampling. I just kept adjusting until the trough was exactly centered and that happened to be 0.