Canon PowerShot A 640 User Manual page 92

Locking the Flash Exposure Setting
(FE Lock)
r!]
Shooting Mode
PTv Av
54
You can lock the flash exposure so that the exposure settings are
correctly set regardless of the composition of your subject.
1
Turn on the LCD monitor.
2
Press the
~
button and select
D
(flash on).
3
Focus on the part of the subject on which
you wish to lock the flash exposure setting.
4
Press and hold the shutter button halfway
and press the
~
button.
• The flash will pre-fire and ~ icon will display.
5
Re-aim the camera to compose the shot as
desired and press the shutter button fully.
To Release the FE Lock
Operate a button other than the .. or .. button.
~
The FE lock function is not available when [Flash Adjust] is
LjJ
set to [Manual] (p. 70).