my question regards the calculation of the best focus point for a
situation in wich dof should extend from some near limit different
from the hyperfocal point to infinity. I know about the formula 2*X*Y/X
+Y (where X is the near limit of dof and Y is the far limit) to give

I'm scanning old photos, and some of these photos have a very heavy
diamond pattern (please see image link).
http://www.hali.org/imageProblem.jpg
Does anyone know how I might be able to eliminate this pattern from