User manual

Figure
18
Figure
19
everything
from
about
4 % feet to almost 8 feet
will
be
sharp.
If
the
camera
is
focused for
15
feet, we find
that
atj/5.6,
Figure 19,
everything
from
about
I I feet
to
about
20
feet will
be
sharp,
and
withj/I
I every-
thing
from
about
9
Y2
feet to 35 feet will
be
sharp.
The
DEPTH
OF
FIELD
SCALE
indicates
the
depth
to
the
rear
only
when
the
camera
is
focused for
3
Y2
feet.
For
3
Y2
feet
the
depth
with
j/3.5
is
3 feet
4 inches to 3 feet 8 inches;
withj
/5ยท6, 3 feet 3 inches
to 3 feet 9
% inches.
25