Canon EOS60D18135ISKIT User Manual (en)

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: Selecting the AF ModeN
This AF mode is for moving subjects when the focusing distance 
keeps changing. While you hold down the shutter button halfway, 
the subject will be focused continuously.
 
The exposure is set at the moment the picture is taken.
 
When the AF point selection (p.78) is automatic, the camera first 
uses the center AF point to focus. During autofocusing, if the subject 
moves away from the center AF point, focus tracking continues as 
long as the subject is covered by another AF point.
AI Focus AF switches the AF mode from One-Shot AF to AI Servo 
AF automatically if the still subject starts moving.
 
After the subject is focused in the One-Shot AF mode, if the subject 
starts moving, the camera will detect the movement and change the 
AF mode automatically to AI Servo AF.
AI Servo AF for Moving Subjects
AI Focus AF for Automatic Switching of AF Mode
 
If focus cannot be achieved, the focus confirmation light <o> in the 
viewfinder will blink. If this occurs, a picture cannot be taken even if the 
shutter button is pressed completely. Recompose the picture and try to 
focus again. Or see “When Autofocus Fails” (p.80).
 
If the [1 Beep] menu is set to [Disable], the beeper will not sound when 
focus is achieved.
With AI Servo AF, the beeper will not sound even when focus is achieved. 
Also, the focus confirmation light <o> in the viewfinder will not light.
When focus is achieved in the AI Focus AF mode with the Servo mode 
active, the beeper will sound softly. However, the focus confirmation light 
<o> in the viewfinder will not light.
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