Depth of field - Wikipedia, the free encyclopedia , miosis).
The basis of these formulas is given in the section Derivation of the DOF formulae;  refer to the diagram in that section for illustration of the quantities discussed below.
<span>Let be the lens focal length, be the lens f -number, and be the circle of confusion for a given image format. The hyperfocal distance is given by
Let be the distance at which the camera is focused (the "subject distance"). When is large in comparison with the lens focal length, the d
last interval [days]
repetition number in this series
scheduled repetition interval
last repetition or drill
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