Nikon Z fc N2016 Reference Manual page 499

Shutter speed
D
Shutter speed can be set as follows when an optional flash unit is used:
Mode
b
P, A
S
M
* Shutter speed may be set as slow as 30 s if slow sync, rear-curtain sync, or
slow sync with red-eye reduction is selected for flash mode.
Third-party flash units
D
The camera cannot be used with flash units that would apply voltages over
250 V to the camera's X contacts or short-circuit contacts on the accessory
shoe. Use of such flash units could not only interfere with normal operation
of the camera but also damage the flash sync circuits of the camera and/or
flash.
i-TTL flash control
D
When an optional flash unit that supports the Nikon Creative Lighting
System is attached and set to TTL, the camera uses monitor pre-flashes for
balanced or standard "i-TTL fill-flash" flash control. i-TTL flash control is not
available with flash units that do not support the Nikon Creative Lighting
System. The camera supports the following types of i-TTL flash control:
Flash control
i-TTL
balanced fill-
flash
Using an on-camera flash
Set automatically by camera (1/200 s–1/60 s)
Set automatically by camera (1/200 s–1/60 s)*
1/200 s–30 s, Bulb, Time
The camera uses "i-TTL balanced fill-flash" flash control for a
natural balance between the main subject and ambient
background lighting. After the shutter-release button is
pressed and immediately before the main flash, the flash
unit emits a series of monitor pre-flashes which the camera
Shutter speed
1/200 s–30 s
Description
499