Has anyone noticed any major differences in the focus from shooting velvia loade d in Toyo holders vs., say, Astia? I noticed that velvia is a much thicker film while Astia, Neopan 400 presto, etc., are much thinner. As I'm about to embark o n a road trip, it makes me wonder if I should focus a tad farther when shooting the Astia/Neopan? I'm guessing that the differences in thickness are, most likel y, negligible compared to one's ability to focus accurately and the variability in holder depth. I was just wondering of anyone had run any tests for comparison s.
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