Nikon D750 DSLR Camera (Body Only) - Manual (Page 344)

316
Select On to reduce barrel distortion when shooting with wide-
angle lenses and to reduce pin-cushion distortion when
shooting with long lenses (note that the edges of the area visible
in the viewfinder may be cropped out of the final photograph,
and that the time needed to process photographs before
recording begins may increase). This option does not apply to
movies and is available only with type G, E, and D lenses (PC,
fisheye, and certain other lenses excluded); results are not
guaranteed with other lenses. Before using auto distortion
control with DX lenses, select
On for Auto DX crop or choose an
image area of DX (24×16) as described on page 110; selecting
other options may result in heavily cropped photographs or in
photographs with severe peripheral distortion.
Auto Distortion Control
G button
➜
C photo shooting menu
A Retouch: Distortion Control
For information on creating copies of existing photographs with
reduced barrel and pin-cushion distortion, see page 412.