Nikon D5 - Manual (Page 128)

106
N
A
3D-tracking
When the shutter-release button is pressed halfway, the colors in the
area surrounding the focus point are stored in the camera.
Consequently 3D-tracking may not produce the desired results with
subjects that are similar in color to the background or that occupy a
very small area of the frame.
A
AF-Area Mode
AF-area mode is shown in the top control panel and viewfinder.
AF-area mode Top control panel Viewfinder Viewfinder focus-point display
Single-point AF
9-point dynamic-
area AF *
25-point dynamic-
area AF *
72-point dynamic-
area AF *
153-point dynamic-
area AF *
3D-tracking
Group-area AF
Auto-area AF
* Only active focus point is displayed in the viewfinder. Remaining focus
points provide information to assist focus operation.