When a CPU lens is mounted on the camera, autofocus can be manually or (in live view) automatically fine-tuned to suit your preferences. In the case of zoom lenses, the camera can store two fine-tuning values for each lens: one for use when the lens is zoomed all the way out (WIDE) and another for when it is zoomed all the way in (TELE).
Use only as required. AF fine-tuning should be performed at the focus distance at which the lens is normally used; fine-tuning performed at short focus distances may be less effective with distant subjects and vice versa. The saved values are applied only during viewfinder photography and do not take effect in live view.
To fine-tune autofocus for the current lens, select [AF fine-tuning options] > [Fine-tune and save lens] in the setup menu. Any previously-saved value for the current lens will be overwritten.
1 Select [Fine-tune and save lens].
In the setup menu, select [AF fine-tuning options], then highlight [Fine-tune and save lens] and press to display the AF fine-tuning dialog. The options displayed vary with the type of lens.
2 Fine-tune autofocus.
Press or to choose from values of +20 to -20, selecting low values to move the focus point toward the camera and high values to move it away. The value currently-selected is shown by , the last saved value for the lens by . In the case of zoom lenses, you can save two fine-tuning values: one for use when the lens is zoomed all the way out (WIDE) and another for when it is zoomed all the way in (TELE). Press or to access the desired option.
If desired, you can press () to end manual tuning and proceed to Step 3 of "Auto AF Fine-Tuning", where you can fine-tune autofocus automatically while previewing the results in live view display.
3 Press .
Press to save the new value. To enable AF fine-tuning during shooting, select [On] for [AF fine-tuning options] > [AF fine-tune on/off] in the setup menu.
To fine-tune autofocus automatically while previewing the results in live view:
1 Ready the camera.
Mount the camera on a tripod and aim it at a flat, high-contrast subject parallel to the camera focal plane. Note that auto AF fine-tuning works best at maximum aperture and may not function in dark surroundings.
2 Start live view.
Rotate the live view selector to and press the button.
3 Start auto AF fine-tuning.
Press the AF-mode and movie-record buttons and keep them pressed until fine-tuning options are displayed.
Zoom lenses: If the current lens is a zoom lens, you will be prompted to choose two separate values, one for use when the lens is zoomed all the way out (WIDE) and another for when it is zoomed all the way in (TELE). Highlight [WIDE] or [TELE] and press to display the fine-tuning dialog with the center focus point selected. Before proceeding to Step 4, rotate the zoom ring to zoom all the way out (WIDE) or all the way in (TELE) according to the option selected.
Fixed focal-length (prime) lenses: If the current lens is a prime lens, the camera will display the fine-tuning dialog with the center focus point selected.
If a saved value already exists for the current lens, you will be prompted to either overwrite the existing value or to save the new value under a different name.
4 Focus.
Press the shutter-release button halfway to focus, then zoom in on the view through the lens to confirm that focus is accurate. Focus can be adjusted manually if necessary.
5 Press .
If fine-tuning is successful, the new AF fine-tuning value for the current lens will be added to the [List save values] list and [On] will automatically be selected for [AF fine-tune on/off], enabling AF fine-tuning.
After completing AF fine-tuning for either the maximum angle or maximum zoom, press the button and choose the remaining zoom position ([WIDE] or [TELE]). Repeat Steps 4 and 5 to complete auto fine-tuning for the selected item.
6 Exit the fine-tuning dialog.
Press to exit the fine-tuning dialog.
To view previously-saved fine-tuning values, elect [AF fine-tuning options] > [List saved values] in the setup menu. The camera can store values for up to 40 lenses. To help distinguish between multiple lenses of the same type, each lens can be assigned a unique identifier—for example, the last two digits of the lens serial number—by highlighting the lens in the list, pressing , and choosing the desired identifier in the [Choose lens number] dialog.
To delete a saved value when it is no longer needed, highlight the lens in the list and press .
