Nikon Z 9 Reference Manual page 304

❚❚ "Output Resolution"
•
When [Auto] is selected for [HDMI] > [Output resolution] in the
setup menu, the camera automatically detects whether the external
recorder supports the frame size and rate selected on the camera. If it
does not, the camera will search for a supported resolution and frame
rate in the order listed below. If no supported resolution and frame
rate is found, output will be suspended.
- No memory card inserted in camera:
Frame size/frame rate Output resolution/frame rate search order
[7680×4320; 30p]
[7680×4320; 25p]
[7680×4320; 24p]
[3840×2160; 120p]
[3840×2160; 100p]
[3840×2160; 60p]
[3840×2160; 50p]
[3840×2160; 30p]
[3840×2160; 25p]
[3840×2160; 24p]
Recorders
304
4320/30p V 2160/30p V 1080/30p
4320/25p V 2160/25p V 1080/25p
4320/24p V 2160/24p V 1080/24p
2160/120p V 1080/120p V 2160/60p V
1080/60p V 2160/30p V 1080/30p
2160/100p V 1080/100p V 2160/50p V
1080/50p V 2160/25p V 1080/25p
2160/60p V 1080/60p V 2160/30p V
1080/30p
2160/50p V 1080/50p V 2160/25p V
1080/25p
2160/30p V 1080/30p
2160/25p V 1080/25p
2160/24p V 1080/24p