I asked:

> I'm not sure I understand how DOF "changes" based on your final print size.
> Could you elaborate?

And Shelwrote:

> ... the bigger the print the more important critical focusing is, and
> greater DOF is needed to maintain an area of acceptable sharpness.

Yes, stating the problem that way makes perfect sense to me. The DOF does
not change, but areas that are out-of-focus become even more noticeable as
the the print size increases.

Thanks!

t
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