U.M. 2
Table Of Contents
Depth-of-Field Scale
The
depth·of·field
scale
indicates
the
range
of
subjects
which
will
be in
focus
sharply
on
the
film.
This
range will
vary
with
the
following
factors
: The
depth·of
·
field
will be deeper
the
smaller
the
aperture
opening,
the
further
the
distance
of
the
subject,
and/
or
the
shorter
the
lens focal
length.
The
depth·of
·
field
will be
shallower
the
larger
the
aperture
opening,
the
nearer
the
distance
of
the
subject,
and/
or
the
longer
the
lens focal
length
.
34
t /8
50mm
Depth·ot·field
2.3m-4
.3 m
18
'
-14'
)
Foc
used
at
3m 1
10
')
o
For example,
if
the
lens used is
50mm
and
the
subject
has been focused
at
a
distance
of
3m
(10').
with
an
f/ 8
aperture
value read
off
from
both indexes on
either
side
of
the
indicator
(orange line).
the
depth
·
of
·
field
is
from
approxi
·
mately
2.
3m
(8')
to
4.3m
(14').