[Leica] Depth of Field

["Gib Robinson" <robinson@sfsu.edu>]

As I recall, there is an ideal point to focus on in order to get the most
area in focus both in front and behind a subject. Can someone please tell me
what the rule of thumb is: -- something like "put the subject 1/3 into the
area of sharp focus." Is that it? For example, if the lens I'm using has a
DoF of 6 feet at 100 ft,  would get the best results by focusing at 98 feet?
With short focal length lenses, I normally just put the subject at the
closest point that will be in sharp focus, but with a long lens that leaves
the immediate forground around the subject fuzzy.

- --Gib