Aperture-Priority Ae - Canon EOS 350D Instruction Manual

f Aperture-Priority AE
In this mode, you set the desired aperture and the camera sets the
shutter speed automatically to suit the subject brightness. This is called

aperture-priority AE.

A larger aperture opening (lower f/number) will result in a blurred
background ideal for portraits. This occurs because a lower f/number
decreases the depth of field (range of acceptable focus). On the other
hand, a smaller aperture opening (higher f/number) will make more of
the foreground and background fall within acceptable focus. A smaller
aperture opening increases the depth of field.
* <f> stands for Aperture value.
With a large aperture opening
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With a small aperture opening
1
Set the Mode Dial to <f>.
2
Set the desired aperture value.
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While looking at the LCD panel, turn
the <6> dial.
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It can be set in 1/3-stop increments.
3
Focus the subject.
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Press the shutter button halfway.
s
The shutter speed is set automatically.
4 Check the viewfinder display and
shoot.
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As long as the shutter speed is not
blinking, the exposure will be correct.