Canon EOS 30D EOS 30D Instruction Manual - Page 174

3 Custom Function SettingsN C.Fn-18 Lens AF stop button function 0: AF stop 1: AF start AF operates only while the AF stop button is pressed. While the button is pressed, AF operation with the camera is disabled. 2: AE lock When the button is pressed, AE lock is applied. Convenient when you want to focus and meter separately. 3: AF point: M 9 Auto / Auto 9 ctr In the manual AF point selection mode, the button instantly switches to automatic AF point selection from manual AF point selection only while you hold it down. Convenient when you are no longer able to focus track a moving subject with a manuallyselected AF point in the AI Servo AF mode. In the automatic AF point selection mode, the button selects the center AF point only while you hold it down. 4: ONE SHOT AI SERVO In the One-Shot AF mode, the button switches to the AI Servo AF mode only while you hold it down. In the AI Servo AF mode, the button switches to the One-Shot AF mode only while you hold it down. Convenient when you need to keep switching between One-Shot AF and AI Servo AF for a subject which keeps moving and stopping. 5: IS start With the lens' IS switch already ON, the Image Stabilizer operates only while you press the button. x The AF stop button is provided only on super telephoto lenses. C.Fn-19 Add original decision data 0: Off 1: On Data for verifying whether the image is original or not is appended to the image. When an image appended with the verification data is played back, the icon will be displayed. (p.114) To verify whether the image is original, the Data Verification Kit DVK-E2 (optional) is required. 174