Canon EOS Rebel T5i 18-55mm IS STM Lens Kit 手册

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页码 388
160
Changing the Autofocus Method (AF Method)
 
If no faces are detected or if you tap 
the LCD monitor but do not select any 
face or subject, the camera will switch 
to [FlexiZone - Multi] with automatic 
selection (p.161).
3
Focus the subject.
 
Press the shutter button halfway to 
focus.
X
When focus is achieved, the AF point 
will turn green and the beeper will 
sound.
X
If focus is not achieved, the AF point 
will turn orange.
4
Take the picture.
 
Check the focus and exposure, then 
press the shutter button completely to 
take the picture (p.146).
 
If the focus is far off, face detection will not be possible. If you set 
[Continuous AF] to [Enable], you can prevent the image from becoming 
greatly out of focus.
 
An object other than a human face may be detected as a face.
 
Face detection will not work if the face is very small or large in the 
picture, too bright or too dark, or partially hidden.
 
The <p> may cover only part of the face.
 
If you press <0> or the <L> button, the AF point <
> will appear at 
the center and you can use the <S> keys to move the AF point.
 
Since AF is not possible with a face detected near the edge of the picture, 
the <p> will be grayed out. If you press the shutter button halfway, the 
subject will be focused in FlexiZone - Multi method with automatic 
selection.