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A correct exposure is established by a combination of shutter
speed and aperture setting according to the subject brightness.
There are many correct combination s of shutter speed and
aperture a particular subject brightness. Different shutter speed
and aperture settings produce different effects.
EFFECT OF APERTURE AND
SHUTTER SPEED
Effect of shutter speed
The shutter determines the film
exposure times, or the length of
time that the 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 water waterfall) by
intentionally using a slower
shutter speed.
Choosing a faster shutter speed
will allow the image of a moving
subject to be frozen. A faster
shutter speed also helps prevent
camera sake.