Canon EOS Rebel T2i EOS REBEL T2i / EOS 550D Instruction Manual - Page 195

C.Fn IV: Operation/Others

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3 Custom Function SettingsN C.Fn-8 Mirror lockup 0: Disable 1: Enable Prevents camera vibrations caused by the reflex mirror action which can disturb shooting with super telephoto lenses or close-up (macro) shooting. See page 106 for the mirror lockup procedure. C.Fn IV: Operation/Others C.Fn-9 Shutter/AE lock button 0: AF/AE lock 1: AE lock/AF Convenient when you want to focus and meter separately. Press the button to autofocus, and press the shutter button halfway to apply AE lock. 2: AF/AF lock, no AE lock In the AI Servo AF mode, you can press the button to stop the AF operation momentarily. This prevents the AF from being thrown off by any obstacle passing between the camera and subject. The exposure is set at the moment the picture is taken. 3: AE/AF, no AE lock This is useful for subjects which keep moving and stopping 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 at the moment the picture is taken. Thus, the optimum focusing and exposure will always be achieved as you wait for the decisive moment. When 1 or 3 is set, pressing the Remote Switch (p.205) halfway will not work. 195

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195
3
Custom Function Settings
N
C.Fn-8
Mirror lockup
0: Disable
1: Enable
Prevents camera vibrations caused by the reflex mirror action which can
disturb shooting with super telephoto lenses or close-up (macro)
shooting. See page 106 for the mirror lockup procedure.
C.Fn IV: Operation/Others
C.Fn-9
Shutter/AE lock button
0:
AF/AE lock
1:
AE lock/AF
Convenient when you want to focus and meter separately. Press the
<
A
> button to autofocus, and press the shutter button halfway to apply
AE lock.
2:
AF/AF lock, no AE lock
In the AI Servo AF mode, you can press the <
A
> button to stop the AF
operation momentarily. This prevents the AF from being thrown off by
any obstacle passing between the camera and subject. The exposure is
set at the moment the picture is taken.
3:
AE/AF, no AE lock
This is useful for subjects which keep moving and stopping repeatedly.
In the AI Servo AF mode, you can press the <
A
> button to start or stop
the AI Servo AF operation. The exposure is set at the moment the
picture is taken. Thus, the optimum focusing and exposure will always
be achieved as you wait for the decisive moment.
When 1 or 3 is set, pressing the Remote Switch (p.205) halfway will not
work.