Nikon D4 User Manual download pdf (Page 39)

Autofocus Tips

Focusing with the AF-ON Button

If AF-ON only is selected for Custom Set-

ting a4 (AF activation), the B button

can be used to focus and the shutter-re-

lease button to release the shutter. To

lock focus or suspend autofocus when

an obstacle comes between you and

the subject, release the B button.

B button

In the AF-ON position, the focus opera-

tion selection switch on some telephoto

lenses functions in the same way as the

B button.

Choosing the Number of Focus Points

Custom Setting a7 (Number of focus points) can be used

to choose the focus points available for manual focus point

selection. Choose 11 points for faster focus point selection

when composing photographs.

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Nikon D4 User Manual Page 39