LEICA MP 0.72 Rangefinder Camera (Silver) - Handbuch (Seite 78)

73
Depth of field scale
The plane – parallel to the film – to which the
lens is set, is depicted with maximum sharpness.
This maximum sharpness gradually diminishes
in front of and behind the set plane, which
means that there is a certain depth that is repro-
duced sharply in the picture: this is the depth of
field. It depends on the distance, the focal length
of the lens (together these give the enlargement)
and the set aperture. Stopping down, i.e. setting
a higher value, increases the depth of field while
stopping up, i.e. setting a lower value, reduces it.
With the depth of field scale (16 c) it is possible
to read off the depth of field range at the
currently set distance on the distance setting
ring (17).
For example, if the LEICA SUMMILUX-M 50 mm
f/1.4 lens is set to 5 m, the depth of field at f/4
is from approximately 4 m to 8 m. If you then stop
down to f/11 with the same distance, the depth
of field is from 3m to around 20 m.