Canon PowerShot SX400 IS User Manual page 118

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Helps avoid missing sudden photo opportunities,
On because the camera constantly focuses on subjects until
you press the shutter button halfway.
Conserves battery power, because the camera does not
Off
focus constantly.
Shooting with the AF Lock
The focus can be locked. After you lock the focus, the focal
position will not change even when you release your finger from
the shutter button.
1
Lock the focus.
●
With the shutter button pressed
halfway, press the [ ] button.
●
The focus is now locked, and [
is displayed.
●
To unlock the focus, release the
shutter button and press the [ ]
button again. In this case, [
no longer displayed.
2
Compose the shot and shoot.
Still Images
118
Movies
]
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