elf wrote:...
p.s. The full formula (translated from Lefkowitz to Excel): DOF=2*COC*Fstop*(Magnification+1/(Magnification*Magnification))

I believe that for a non-reversed lens:

DOF=2*COC*Fstop*(Magnification/PupilaryRatio+1)/(Magnification*Magnification)[/quote]

Pupilary ratio = exit.pupil/entrance.pupil

Pupil ratio, also called "pupillary magnification factor" or just "pupil factor", is the ratio of diameters between the exit and entrance pupils of a lens. Pupil ratio is important because it affects how a lens behaves when it is extended for close focus. If you rely on experience and experiment, t...