Nikon NIKKOR Z 70-200mm f/2.8 VR S Lens - Manual (Page 143)

119 The i Button
Choose Image Area
Choose the size of the area on the image sensor used to record
movies. Select
FX to shoot movies in what is referred to as “FX-
based movie format”, DX to shoot in “DX-based movie format”.
The differences between the two formats are shown in the
illustration.
The dimensions of the area recorded vary with the frame size:
The option currently selected is shown
by an icon in the display.
FX DX
Format Frame size
Area recorded (approximate)
Z 7 Z 6
FX-based movie
format
3840 Ч 2160 35.9 Ч 20.2 mm
1920 Ч 1080 35.8 Ч 20.1 mm 35.9 × 20.1 mm
DX-based movie
format
3840 Ч 2160
23.5 Ч 13.2 mm
23.4 × 13.2 mm
1920 Ч 1080 23.4 Ч 13.1 mm