Pentax ZX-10 ZX-10 Manual - Page 45

Effect, Aperture, Shutter, Speed

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SNOLLVU3dO O30NVAOV SNOILVEI3d0 030NVAOV 84 (17) EFFECT OF APERTURE AND SHUTTER SPEED !P; a High shutter speed la : S e a • • • a .• •. . A correct exposure is established by a combination of shutter speed and aperture setting according to the subject brightness. There are many correct combinations of shutter speed and aperture for a particular subject brightness. Different shutter speed and aperture settings produce different effects. Effect of Shutter Speed The shutter speed determines the film exposure time, or the length of time that light is allowed to strike the film. If the subject is moving the image will be blurred when a slow shutter speed is used. It is possible to enhance the effect of motion, (The movement of a wave or waterfall) by intentionally using a slower speed. Choosing a higher shutter speed will allow the image of a moving subject to be frozen. A higher shutter speed also helps prevent camera shake. Slow shutter speed • 4' 44,1 Closed-down aperture 85 Effect of Aperture The aperture increases or reduces the amount of re- flected light from an object which passes through the lens, controlling how much light strikes the film. If the aperture is opened up to increase the amount of light, 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 instance, if you shoot a person against a landscape with the aperture open, the landscape in front of and be- is hind the person will be blurred, making the person appear to rise out of the landscape. By contrast, closing down the aperture increases the in-focus range. Open aperture

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a
SNOLLVU3dO
O30NVAOV
84
(17)
EFFECT
OF
APERTURE
AND
SHUTTER
SPEED
S
e
!P;
a
•
•
•
a
.•
•.
.
High
shutter
speed
la
:
•
4
'
Slow
shutter
speed
441
,
is
Closed
-down
aperture
Open
aperture
A
correct
exposure
is
established
by
a
combination
of
shutter
speed
and
aperture
setting
according
to
the
subject
brightness.
There
are
many
correct
combina-
tions
of
shutter
speed
and
aperture
for
a
particular
sub-
ject
brightness.
Different
shutter
speed
and
aperture
settings
produce
different
effects.
Effect
of
Shutter
Speed
The
shutter
speed
determines
the
film
exposure
time,
or
the
length
of
time
that
light
is
allowed
to
strike
the
film.
If
the
subject
is
moving
the
image
will
be
blurred
when
a
slow
shutter
speed
is
used.
It
is
possible
to
enhance
the
effect
of
motion,
(The
movement
of
a
wave
or
wa-
terfall)
by
intentionally
using
a
slower
speed.
Choosing
a
higher
shutter
speed
will
allow
the
image
of
a
moving
subject
to
be
frozen.
A
higher
shutter
speed
also
helps
prevent
camera
shake.
85
Effect
of
Aperture
The
aperture
increases
or
reduces
the
amount
of
re-
flected
light
from
an
object
which
passes
through
the
lens,
controlling
how
much
light
strikes
the
film.
If
the
aperture
is
opened
up
to
increase
the
amount
of
light,
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
instance,
if
you
shoot
a
person
against
a
landscape
with
the
aperture
open,
the
landscape
in
front
of
and
be-
hind
the
person
will
be
blurred,
making
the
person
ap-
pear
to
rise
out
of
the
landscape.
By
contrast,
closing
down
the
aperture
increases
the
in
-focus
range.
SNOILVEI3d0
030NVAOV