Aperture-Priority - Canon EOS 20D 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. The smaller the aperture (larger f/number), the
wider the depth of field (range of acceptable focus). The larger the
aperture (smaller f/number), the narrower the depth of field.
* <Av> stands for Aperture value.
With a large aperture With a small aperture
_'_I Set the Mode Dial to
<Av>.
'_jj_ Set the desired aperture value.
_ While looking at the LCD panel, turn
the <_> dial.
_ It can be set in 1/3-stop increments.
j
_ Focus the subject.
_ Press the shutter button halfway,
_ The shutter speed is set
automatically.
_ll_ _, Check the viewfinder display and
shoot.
_ As long as the shutter speed is not
blinking, the exposure will be correct.
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