User Guide

Depth of Field
The lens is also provided with a scale calibrated in meters
but it will seldom be necessary to refer to this.
This is the depth of field scale [13] and works the following
way:
All lenses when focused on a given subject will show some
objects in front of and behind that subject sharply in focus.
This range is called "Depth of Field" and varies with
different lenses. With any lens you will find that "Depth of
Field" is always great as small apertures such as F/16 and
less at large apertures such as F2.
Depth of Field is also greater with a more distant subject
that a nearby subject and increases nearly twice as much
beyond the subject than in front of it.
To use the depth of field scale, first focus on your subject
then determine how great a Depth of Field a given
aperture will give by reading distances against the two
marks for that aperture. The figure on the left will be the
nearest point in focus and that to the right the furthest,
thus enabling you to select that aperture which will give
the desired Depth of Field.