Av: ttl autoflash and aperture-priority ae, Set the desired aperture, Take the picture – Canon 420EX User Manual

Page 35

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Flash in Other Picture-Taking Modes

Av: TTL Autoflash and Aperture-Priority AE

When you want to control the depth of field or when you want both the

subject and background exposed correctly, use aperture-priority AE. You

set the aperture, and the camera sets the shutter speed automatically to

expose the background correctly The TTL autoflash exposure is based on

the aperture you set

&S S.C i •

Set the camera to < A v > (aperture-

priority AE).

* •

Set the desired aperture.

• Turn the camera's electronic dial to

set the aperture.

Take the picture.

• Focus the subject, check that the

<^> icon is lit in the viewfinder, then

take the picture.

41 In low-light conditions, a slow sync speed is set automatically A tripod is

recommended for slow sync speeds.

Q If the camera's fastest sync speed blinks, the background will be overexposed. If

the 3C" sync speed blinks, the background will be underexposed. Change the

aperture setting until the sync speed stops blinking.

35

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