C.Fn-18 Switch to the registered AF point

1:Press the <P> button to switch to the registered AF point.

2:Switch to the registered AF point only while you press the <P> button. When you release the button, the AF point selected previously becomes active again. You can thereby easily switch between the selected AF point and registered AF point.

If C.Fn-04-1/3 is also set, you can press the <P> button to switch to the registered AF point and start the AF at the same time.

C.Fn-19 Lens AF stop button function

1:AF operates only while the AF stop button is pressed. While the button is pressed, AF operation with the camera is disabled.

2 : When the button is pressed while metering is still active, AE lock takes effect. Convenient when you want to focus and meter separately.

3 : In the manual AF point selection mode, holding down the button switches to automatic AF point selection (among 45 AF points). Holding down the button switches from manual AF point selection to automatic AF point selection instantly. Convenient when you are no longer able to focus track a moving subject with a manually- selected AF point in the AI Servo AF mode.

In the automatic AF point selection mode, the center AF point is selected only while you hold down the button.

4 : In the One-Shot AF mode, the camera switches to AI Servo AF mode only while you hold down the button. In the AI Servo AF mode, the camera switches to One-Shot AF mode only while you hold down the button. Convenient when you need to keep switching between One-Shot AF and AI Servo AF for a subject which keeps moving and stopping.

5:With the lens’ IS switch already ON, the Image Stabilizer operates only while you press the button.

The AF stop button is provided only on IS super telephoto lenses.

153