Nikon D810 - Manual (Page 83)

59
Image Area
Regardless of the option selected for Image area in the shooting
menu (0 74), all movies and photographs recorded in movie live
view (0 49) have an aspect ratio of 16 : 9.
Images recorded with On selected for Image area > Auto DX
crop (0 75) and a DX lens attached use a DX-based movie
format, as do images recorded with DX (24×16) selected for
Image area > Choose image area. Other images use an FX-
based movie format. A a icon is displayed when the DX-based
movie format is selected. The approximate size of the area at the
center of the image sensor used to record photographs taken in
movie live view is 32.8 × 18.4 mm when the FX-based movie
format is selected and 23.4 × 13.2 mm when the DX-based
movie format is selected.
A
HDMI
If the camera is connected to an HDMI device (0 48), the view through
the lens will appear both in the camera monitor and on the HDMI
device.
DX-format crop (0 75)
DX-based movie
format crop
FX-format crop (0 75)
FX-based movie
format crop