Pentax ES ES Manual - Page 24

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DEPTH-OF-FIELD GUIDE If you want to know how great the depth of field is at a certain aperture, look at the depth-of-field guide. In the above photograph, the distance scale is set at 5 meters . .. 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 the 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 guide indicates the area in focus at the lens opening. You will note from the depth-of-field guide in the photograph that the range from approximately 4.5 to 6.5m is in focus. Note that as the lens apertures change, the effective depth of field also changes. For the depth of fields at different apertures and distances, refer to the next page. Depth of field is the range between the nearest and farthest distances which are in focus at different lens apertures. ft co 30 15 10 7 m 10 5 3 2 16 I ;I II. 4I 6 I 16 Distance (m) 1 8 5.6 4 2.8 2 1.4 22 • • "..16%.' • • • 2 3 45 10 11 F1.4 F1.8 F4 F11 F16

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DEPTH
-OF
-FIELD
GUIDE
If
you
want
to
know
how
great
the
depth
of
field
is
at
a
certain
aperture,
look
at
the
depth
-of
-field
guide.
In
the
above
photograph,
the
distance
scale
is
set
at
5
meters
.
..
the
lens
is
focused
on
a
subject
5
meters
away.
The
calibrations
on
each
side
of
the
distance
index
cor-
respond
to
the
diaphragm
setting
and
indicate
the
range
of
in
-focus
distance
for
different
lens
apertures.
For
example,
if
the
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
guide
indicates
the
area
ft
30
15
m
co
10
5
10
7
3
2
16
I
;I
II.
I
4
6
I
16
1
8
5.6
4
2.8
2
1.4
22
in
focus
at
the
lens
opening.
You
will
note
from
the
depth
-of
-field
guide
in
the
photograph
that
the
range
from
approximately
4.5
to
6.5m
is
in
focus.
Note
that
as
the
lens
apertures
change,
the
effective
depth
of
field
also
changes.
For
the
depth
of
fields
at
different
aper-
tures
and
distances,
refer
to
the
next
page.
Depth
of
field
is
the
range
between
the
nearest
and
farthest
distances
which
are
in
focus
at
different
lens
apertures.
•
•
"..16%.'
•
•
2
3
4
5
10
F1.4
F1.8
F4
F11
•
Distance
(m)
11
F16