Av: e-ttl autoflash and aperture-priority ae, Set the desired aperture, Take the picture – Canon 420EX User Manual
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Flash in Other Picture-Taking Modes
Av: E-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 E-TTL autoflash exposure is based
on the aperture you set.
* •
1
Set the camera's Command Dial
to
• Set the high-speed sync switch to
<•>.
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.
u
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 30" sync speed blinks, the background will be underexposed. Change the
aperture setting until the sync speed stops blinking.
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