More Details About Capture Functions; Effect Of Aperture And Shutter Speed - Pentax *istD Operating Manual

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More Details about Capture Functions

Effect of Aperture and Shutter Speed

Correct exposure of the subject is established by a combination of shutter
speed and aperture setting. There are many correct combinations of
shutter speed and aperture for a particular subject. Different shutter speed
and aperture settings produce different effects.
Effect of shutter speed
The shutter speed determines the length of time that the light is allowed to
strike the CCD, to adjust the amount of light striking the CCD.
• Using slower shutter speed
If the subject is moving, the image will be
blurred because the shutter is open longer.
It is possible to enhance the effect of motion
(rivers, waterfalls, waves, etc.) by intentionally
using a slower shutter speed.
• Using faster shutter speed
Choosing a faster shutter speed will allow
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freezing the action of a moving subject.
Even if the subject is not moving, a faster
shutter speed also helps prevent camera
shake.