Graflex 35 - img015

NOTE:
DEPTH OF FIELD SCALE
Any change in the diaphragm setting demands a compensating change
in the shutter speed. Example: f/8 changed to f/ll; 1/50 sec. changes
to 1/25 sec.
Depth of field will help you to
include a great deal of subject
matter in sharp focus in the
picture. In order to utilize it to
the best advantage, the Visi-
Ready scale has two sets of
diaphragm numbers across the
front of it, above the dial con-
taining the focusing scale.
Simply focus through the
rangefinder in the normal
manner and determine the
exposure required by the sub-
ject, set the shutter speed and
diaphragm settings in the
usual manner . The two sets of figures on the depth of field scale represent dia-
phragm numbers or settings. As an example, assume the exposure will be 1/ 50 at
f/11, and the subject is at a distance of about 6', you will find that the area of
sharpest focus (depth of field) will lie within the distances indicated on the focus-
ing scale between the two l1's on the depth of field scale. In the example illus-
trated this would be from about 5' to 8' . If f / 16 were used the depth of field as
shown would extend from less than 5' to more than 8' . 15