Leica M4-P, Instructions Manual, Page: 16 / 32

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16
The depth-of-field scale
The lens reproduces at maximum sharp-
ness the plane, parallel to the film, on
which it is focused. This maximum
sharpness falls off gradually towards the
front and rear; within a certain depth, then,
the subject will appear sharp. This depth of
field depends on the camera distance, the
focal length of the lens, and the lens stop
set. Stopping down the lens increases,
opening it up decreases the depth of field.
The depth-of-field scale indicates the
depth-of-field zone for the object distance
on which the lens is focused.
With the 50mm SUMMICRON® f/2
focused on 5m (16ft, Sin), sharpness at f/4
extends from 4m to about 8m (13ft. 4in to
about 26ft. Sin). However, if you stop down
to f/11 at the same focusing distance,
sharpness will extend from 3m to about
20m (10ft. to about 67ft.).