Pentax SF-1 SF-1 Manual - Page 58

Depth, Field

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DEPTH OF FIELD With 50mm f/1.4 lens jj co 15 10 9 8 7 6 5 4 f 3I 2 I 0 FI 4 F5. 6 F I F22 Camera-to-subject distance Iml Depth of field refers to the range around the optimum focusing point of the subject in which the elements at different distances are in focus. Camera-to-subject distance • ■ -Depth of field - • 54 The depth of field increases as the aperture becomes smaller, as the focal length of the lens becomes shorter, and as the subject is positioned farther away. By changing apertures, you can control the depth of field and create different visual effects. As illustrated in the examples at right (using f/1.4 and f/22 settings), the in-focus range can be confirmed by the depth-of-field scale on the lens. * Some zoom lenses do not have a depth-of-field scale due to mechanical reasons.

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DEPTH
OF
FIELD
jj
With
50mm
f/1.4
lens
co
15
10
9
8
7
6
5
4
f
3I
2
I
0
F
I
4
F5.
6
F
I
F22
Camera
-to
-subject
distance
Iml
Depth
of
field
refers
to
the
range
around
the
optimum
focusing
point
of
the
subject
in
which
the
elements
at
different
distances
are
in
focus.
•
■
•
54
Camera
-to
-subject
distance
-Depth
of
field
-
The
depth
of
field
increases
as
the
aperture
becomes
smaller,
as
the
focal
length
of
the
lens
becomes
shorter,
and
as
the
subject
is
positioned
farther
away.
By
changing
apertures,
you
can
control
the
depth
of
field
and
create
different
visual
effects.
As
illustrated
in
the
examples
at
right
(using
f/1.4
and
f/22
settings),
the
in
-focus
range
can
be
confirmed
by
the
depth-of
-field
scale
on
the
lens.
*
Some
zoom
lenses
do
not
have
a
depth
-of
-field
scale
due
to
mechanical
reasons.