Pentax PZ-1 PZ-1 Manual - Page 110
Depth, Field
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2) DEPTH OF FIELD With Zoom 35-70mm (at 35mml --- 4 yiTY CO 15 10 9 8 7 6 5 4 3 2 f/3.5 f/5.6 4-Camera-to-subject distance (m) f/11 f/16 When one point on a subject is brought into focus, the EP in-focus range extends in front of and behind it. This range o-row0 is called the depth of field. zT The range allowed for focusing The depth of field increases as the aperture is closed down, the focal length of the lens becomes shorter, or the subject is positioned further away. Zoom lenses do not have a depth-of-field scale for mechanical reasons.
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2)
DEPTH
OF
FIELD
With
Zoom
35-70mm
(at
35mml
---
4
yiTY
CO
15
10
9
8
7
6
5
4
3
2
f/3.5
f/5.6
f/11
f/16
4
—Camera
-to
-subject
distance
(m)
When
one
point
on
a
subject
is
brought
into
focus,
the
EP
in
-focus
range
extends
in
front
of
and
behind
it.
This
range
ow
is
called
the
depth
of
field.
-ro
0
zT
The
range
allowed
for
focusing
The
depth
of
field
increases
as
the
aperture
is
closed
down,
the
focal
length
of
the
lens
becomes
shorter,
or
the
subject
is
positioned
further
away.
Zoom
lenses
do
not
have
a
depth
-of
-field
scale
for
mechanical
reasons.