Nikon Z9 Mirrorless Camera - Manual (Page 122)

122 Focus
D Cautions: Vehicle-Detection AF
• Subject detection may not perform as expected with subjects that are:
- too large or small relative to the frame,
- too bright or too dark,
- partially hidden,
- similar in color to surrounding objects, or
- moving quickly.
• The camera may fail to detect vehicles of some shapes and colors.
Alternatively, it may display a border around subjects that are not vehicles.
D Subject Detection
The performance of subject-detection may drop:
• during high-speed frame capture or
• if either [ HLG ] or [ N-Log ] is selected as the tone mode for [ Video file type ]
> [ ProRes 422 HQ 10-bit (MOV) ] or [ H.265 10-bit (MOV) ] in the video
recording menu.