Canon PowerShot SX420 IS Black 手册

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页码 347
123
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 Contents
Changing the AF Frame Mode
 Still Images 
 Movies
Change the AF (auto focus) frame mode to suit the shooting 
conditions as follows.
 
Press the [
] button, 
choose [AF Frame] on the [ ] 
tab, and then choose the desired 
option (= 56).
Center
 Still Images 
 Movies
One AF frame is displayed in the center. Effective for reliable 
focusing.
 
A yellow AF frame is displayed with [ ] if the camera cannot 
focus when you press the shutter button halfway.