In <01BE3ADB.8728CF00@xxxxxxxxxxxxxxxxxxxxxx>, on 01/08/99 at 07:50 AM,
Dave Bulger <dbulger@xxxxxxxxxxxxx> said:
>This is gonna bug me until I know exactly what aperture each of
>my lenses is sharpest at.
You could do worse than to use the rule of thumb that a lens approaches
its optimum performance about two to three stops down from its maximum
aperture.
les clark
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lclark@xxxxxxxxxxx
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