Pentax ME ME Manual - Page 22

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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 aperture. 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. • /; 7 f/4 3 2 1 0 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
aperture.
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.
•
/;
7
f/4
3
2
1
0
Distance
(m)