Preset focus point: Pressing the control selects a preset focus point. To choose the point, select it and press the control while pressing the AF-mode button until the focus point flashes. If this option is assigned to the lens focus function buttons, you can select the preset focus point by pressing and holding a lens focus function button. Release the button to restore the original focus point selection.
AF-area mode: Highlight this option and press to select an AF-area mode (3D-tracking excluded). The selected mode will take effect while the control is pressed; releasing the control restores the original AF-area mode.
AF-area mode + AF‑ON: As for AF-area mode, above, except that pressing the control also initiates autofocus.
AE/AF lock: Focus and exposure lock while the control is pressed.
AF lock only: Focus locks while the control is pressed.
AF‑ON: Pressing the control initiates autofocus.
Lens Focus Function Buttons
You can use Lens focus function buttons to choose the role played by the focus function buttons when the focus function selector on the lens is set to AF‑L. For fast-moving sports, choose AF-area mode to enable rapid AF-area mode selection.
Lenses with Focus Function Selectors
As of March 2016, the following lenses featured focus function selectors: