Canon POWERSHOT A3100IS User Manual page 81

_Shooting with the AF Lock
The focus can be locked. After locking the focus, the focal distance will not
change even when you release your finger from the shutter button.
Lock the focus.
_> Keep tile shutter button pressed halfway
and press the 4 button.
_. The focus locks and
AFL
appears on the
screen.
_> If you release your finger from the shutter
button and press the 4 button again,
AFL
w ill
disappear and the focus will unlock.
2 Compose the scene and shoot.
_Changing the Metering Mode
You can change the Metering mode (brightness measuring function) to
match the shooting conditions.
Choose the Metering mode.
_> After pressing the @ button, press the .Av
buttons to choose E®_.
Choose an option.
_> Press the 4_ buttons to choose an option,
then press the @ button.
_. The setting will appear on the screen.
_Suitabte for standard shooting conditions, including back lit
ES_ Evaluative shots. Automatically adjusts the exposure to match the
shooting conditions.
ED center Weighted Averages the light metered from the entire frame, but gives
Avg. greater weight to the center.
Eo_ Spot Only meters within the [ ] (Spot AE Point frame).
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