Canon 3818B001 用户手册

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页码 228
114
Using AF to FocusN
AF operation
 
Focusing will take slightly longer.
 
Even when focus has been achieved, pressing the <A> button will 
focus again.
 
The image brightness may change during and after the AF 
operation.
 
If the light source changes while the Live View image is displayed, 
the screen might flicker and focusing can be difficult. If this happens, 
stop the Live View shooting and autofocus under the actual light 
source first.
 
If you press the <u> button in the Live mode, the AF point area will 
be magnified. If it is difficult to focus in the magnified view, return to 
the normal view and autofocus. Note that the AF speed may differ 
between the normal and magnified views.
 
If you autofocus in the Live mode’s normal view and then magnify 
the image, the focus might be off.
 
In the u Live mode, pressing the <u> button will not magnify the 
image.
Live Mode and u (Face Detection) Live Mode Notes
 
In the Live mode or u (face detection) Live mode, if you shoot a 
peripheral subject and the target subject is slightly out of focus, aim the 
center AF point over the subject to focus, then take the picture.
 
The AF-assist beam will not be emitted.
 
AF is not possible with Remote Switch RS-60E3 (sold separately).