Pentax ME-F ME-F Manual - Page 60

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DEPTH-OF -FIELD SCALE Depth of field is the range between the nearest and farthest distances which are in focus at a given lens aperture. If you want to know how great the depth of field is at a certain aperture, focus on the subject and look at the depth-of -field scale on the lens. In the photograph below the distance scale is set at 5 meters; that is, the lens is focused on a subject 5 meters away. The calibrations on each side of the distance index correspond to the diaphragm setting and indicate the range of in-focus distance for different lens apertures. For example, if a lens opening of f/4 is to be used, the range on the distance scale ring covered within the figure 4 on the depth-of-field scale indicates the area in focus at that lens opening. You will note from the depth-of-field scale in the photograph that the range from approximately 4 to 7m is in focus. Note that as the lens apertures change, the effective depth of field also changes. For the depth of field at different apertures and distances, refer to the next page. rn 22 16 6 11 23 a ?5 8 kik " 8 ' 'It 22 6 4 28 2 '4 • 56 7 6 5 4 3 2 1 0 f/4 Distance (m)

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DEPTH
-OF
-FIELD
SCALE
Depth
of
field
is
the
range
between
the
nearest
and
farthest
distances
which
are
in
focus
at
a
given
lens
aperture.
If
you
want
to
know
how
great
the
depth
of
field
is
at
a
certain
aperture,
focus
on
the
subject
and
look
at
the
depth
-of
-field
scale
on
the
lens.
In
the
photograph
below
the
distance
scale
is
set
at
5
meters;
that
is,
the
lens
is
focused
on
a
subject
5
meters
away.
The
calibrations
on
each
side
of
the
distance
index
correspond
to
the
diaphragm
setting
and
indicate
the
range
of
in
-focus
distance
for
different
lens
apertures.
For
example,
if
a
lens
opening
of
f/4
is
to
be
used,
the
range
on
the
distance
scale
ring
covered
within
the
figure
4
on
the
depth
-of
-field
scale
indicates
the
area
in
focus
at
that
lens
opening.
You
will
note
from
the
depth
-of
-field
scale
in
the
photograph
that
the
range
from
approximately
4
to
7m
is
in
focus.
Note
that
as
the
lens
apertures
change,
the
effective
depth
of
field
also
changes.
For
the
depth
of
field
at
different
apertures
and
distances,
refer
to
the
next
page.
rn
2 3
a
?
5
22
16
8
kik
"
8
'
'
It
22
6
11
6
4
2
8
2
'
4
•
56
7
6
5
4
3
2
1
0
f/4
Distance
(m)