Canon EOS-3 Instructions Manual page 66

Aperture-Priority AE (Av): You Set the Aperture
Basic Terminology 3
● Aperture
The aperture (or F-number) indicates
the size of the aperture opening in the
lens. The aperture displayed on the
camera's LCD panel and in the
viewfinder can range anywhere from
1.0 to 91, depending on the lens
attached to the camera. The larger the
F-number, the smaller the aperture.
And the smaller the F-number, the
larger the aperture.
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2 Release your finger from the
< > button.
3
Turn the <
desired aperture.
Press the shutter button halfway
4
and focus the subject.
• The shutter speed and aperture will be
displayed.
Check the shutter speed and take
5
the picture.
• As long as the shutter speed is not
blinking, a standard exposure will be
obtained.
• If the shutter speed is less than the
reciprocal of the lens focal length (i.e.
1/200 for a 200mm lens), camera shake
may cause a blurred picture.
> dial to set the