User manual
Table Of Contents
Depth
of
Field
Scale
The
range
of
Depth
of
Field
lies
between
the
two
same
lens
opening
figures
provided
on
both
sides
of
the
Distance
Index
Mark.
When
one
subject
is
sharply
focused,
there
is a
finite
range
of
sharpness
extending
to
the
foreground
as
well
as
to
the
background
of
this
sharply
focused
distance
which
is
also
acceptably
in
focus
. This
range
of
sharp·
ness is
known
as
the
Depth
of
Field
of
the
lens
and
depends
on
the
relative
lens
opening
and
the
distance
to
the
subject
focused
upon
. The
smaller
the
opening
the
greater
will
be
the
Depth
of
Field
-
for
a
given
distance
. The
nearer
the
distance,
the
smaller
the
Depth
of
Field
for
a
given
opening
.
If,
for
example,
a
lens
opening
is
set
to
1.8
and
a
distance
is
25
ft,
the
Scale
indicates
a
Depth
of
Field
extending
from
about
21
ft
to
30
ft;
and
when
the
lens
is
set
to
11,
the
Depth
of
Field
ranges
from
about
12
ft
to
00
(infinity)
.
Distance Scale
of
Field Scale
DiSl2t
l!
;o ("c/ox
Mark