Pentax PZ-1 PZ-1 Manual - Page 109

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Effect of Aperture The aperture increases or reduces the amount of the reflected light from an object through the lens, controlling how much light strikes the film. If the aperture is opened up to increase the amount of light, any objects in front of and behind an in-focus subject will not be focused. That is, the range of focus (depth of field) becomes small. If the aperture is closed down to reduce the amount of light, the depth of field increases. For example, if you shoot a person in a landscape with the aperture open, the landscape in front of and behind the person will be blurred, making the person appear to rise out of the landscape. Aperture set at f/4 3 Aperture set at f/22 an • Nk,'•:' AtAltOr • 023= :C: TO0 -0 M 0 co ..A 3, 0 CO G) -'3x1

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Effect
of
Aperture
The
aperture
increases
or
reduces
the
amount
of
the
reflected
light
from
an
object
through
the
lens,
controlling
how
much
light
strikes
the
film.
If
the
aperture
is
opened
up
to
increase
the
amount
of
light,
any
objects
in
front
of
and
behind
an
in
-focus
subject
will
not
be
focused.
That
is,
the
range
of
focus
(depth
of
field)
becomes
small.
If
the
aperture
is
closed
down
to
reduce
the
amount
of
light,
the
depth
of
field
increases.
For
example,
if
you
shoot
a
person
in
a
landscape
with
the
aperture
open,
the
landscape
in
front
of
and
behind
the
person
will
be
blurred,
making
the
person
appear
to
rise
out
of
the
landscape.
Aperture
set
at
f/4
3
Aperture
set
at
f/22
an
0
23=
C:
:
0
co
..A
3,
0
CO
G)
TO
0
-0
M
'17
31.
1;
E
-
<
x
c•-,
m
m
m
ci,
AtAltOr
•
•
Nk
,
'•:'