Canon POWERSHOT G9 User Manual page 131

Advanced Shooting Functions 1129
To Release the AE Lock:
Operate a button other than the ._ button, the control dial and the tSO
Speed dial.
[_] fter locking the AE, you can change the ISO speed with
exposure fixed.
Changing Shutter Speed and Aperture Value
Combinations
Automatically selected combinations of shutter speeds and aperture
values can be freely changed without altering the exposure
(Program Shift).
Focus on the subject on which you wish to
lock the exposure.
2, Press the shutter button halfway.
3
AV bar
Press the _= button.
Exposure is fixed.
Tv bar
,4 Use the control dial to change shutter speed
and aperture value combinations•
Recompose the image and shoot•
• The setting will cancel after the shot is taken.