Canon EOS 10D - Manual (Page 147)

147
Menu Settings
11
Custom Function Settings
2: AF/AF lock, no AE lock
In the AI Servo AF mode, you can press the < > button to
stop the AF operation momentarily when there is an obstruc-
tion passing in front of the camera. This prevents the AF from
being thrown off. The exposure is set when the shot is taken.
3: AE/AF, no AE lock
This is useful for a subject that moves and stops repeatedly. In
the AI Servo AF mode, you can press the <
> button to start
or stop the AI Servo AF operation. The exposure is set when
the shot is taken. Thus, the optimum focusing and exposure
are always ready for the decisive moment.
C.Fn-04 and C.Fn-17-0/1/2 (
→p.151) both have AF start/
stop and AE lock functions. If you have set both of these
Custom Functions and you execute both Custom Function
operations, the latter operation will not work. The only
exception is when AF stop is executed after AF start.
C.Fn-05 AF-assist beam/Flash firing
Sets the AF-assist to be emitted by the camera or external
Speedlite and sets the flash to be fired by the built-in flash or
external Speedlite.
0: Emits/Fires
Enables the AF-assist beam to be emitted and the flash to be
fired.
1: Does not emit/Fires
Disables the AF-assist beam and enables the flash to be fired.
2: Only ext. flash emits/Fires
Enables the AF-assist beam to be emitted only by the external
Speedlite and enables the flash to be fired.
3: Emits/Does not fire
Enables the AF-assist beam to be emitted and disables the
flash.
C.Fn-06 Exposure level increments
0: 1/2-stop
1: 1/3-stop
Sets the setting increment of the shutter speed, aperture, and
exposure compensation amount.