F aperture-priority ae – Canon EOS Rebel XT User Manual

Page 84

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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.

1

Set the Mode Dial to <

f>.

2

Set the desired aperture value.

¡

While looking at the LCD panel, turn
the <

6> dial.

¡

It can be set in 1/3-stop increments.

3

Focus the subject.

¡

Press the shutter button halfway.

s

The shutter speed is set automatically.

4

Check the viewfinder display and
shoot.

¡

As long as the shutter speed is not
blinking, the exposure will be correct.

f Aperture-Priority AE

With a large aperture opening

With a small aperture opening

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