Aperture-Priority Ae - Canon EOS 5D Instruction Manual

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