Canon EOS Digital Rebel XT EF-S 18-55 Kit EOS DIGITAL Rebel XT / EOS 350D Inst - Page 149
C.Fn-4, Shutter button/AE lock button, C.Fn-5, AF-assist beam, C.Fn-6, Exposure level increments
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3 Custom Function SettingsN C.Fn-4 Shutter button/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 attain 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 attained as you wait for the decisive moment. C.Fn-5 AF-assist beam You can enable or disable the camera's AF-assist beam or have it emitted by the EOS-dedicated Speedlite instead. 0: Emits 1: Does not emit The AF-assist beam is not emitted at all regardless of the shooting conditions . 2: Only emits ext. flash With an EOS-dedicated Speedlite, it will emit the AF-assist beam when necessary. The camera's built-in flash will not emit the AFassist beam regardless of the shooting conditions. C.Fn-6 Exposure level increments 0: 1/3-stop 1: 1/2-stop Sets 1/2-stop increments for the shutter speed, aperture, exposure compensation, AEB, etc. The exposure level will be displayed in the viewfinder and on the LCD panel as shown below. 149