ASAHI PENTAX Z-70 Operating Manual page 83

(11) EFFECT OF APERTURE AND SHUTTER SPEED
Slow shutter speed
А correct exposure is established by a combination of
shutter speed and aperture setting according to the
subject brightness. Actually, there are many correct
combinations of shutter speed and aperture for a par-
ticular 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 amount of light striking the film as the shutter stays
open for its designated time. If the subject is moving, its
image will be blurred at a slow speed. In contrast,
choosing a high shutter speed allows a frozen image to
be taken of a moving subject. A high shutter speed also
prevents camera shake. It is possible to enhance the
motion of a wave or a waterfall by blurring the move-
ment using a slow shutter speed.
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