There are simple formulae for calculating hyperfocal
distance and depth of field given the length of the lens,
the f/stop to be used and an arbitrary constant (diameter of
the "circle of confusion," used to express degree of
acceptability of definition of an "in-focus" subject). I
believe depth of field requires data for subject distance,
but you can substitute the hyperfocal distance. BUT......
Save yourself the time and worry. But Thom Hogan's Nikon
Field Guide. It has the formulae, charts and a wealth of
information on everything from aerial photography to macro
flash. For less than US$20, you can have THE book on Nikon
photography.
Bill Cassing
