Nikon D5 - Manual (Page 29)

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Auto AF Fine-Tuning
6 Perform auto AF fine-tuning.
Press the AF-mode and movie-
record buttons simultaneously
and keep them pressed until
the dialog shown in Step 7 is
displayed (this should take
slightly over two seconds).
AF-mode button
Movie-record button
7 Save the new value.
Highlight Yes and press J to
add the AF fine-tuning value
for the current lens to the saved
values list (CPU lenses only).
Note that only one value can be
stored for each type of lens.
8 Enable AF fine-tuning.
In the camera setup menu,
select AF fine-tune > AF fine-
tune (On/Off), then highlight
On and press J.