Nikon Z8 User Manual page 685

e1: Flash Sync Speed
Choose the flash sync speed.
Option
[1/250 s (Auto FP)]
[1/200 s (Auto FP)]
[1/200 s]
[1/160 s]
[1/125 s]
[1/100 s]
[1/80 s]
[1/60 s]
Flash sync speed is set to ¹⁄₂₅₀ or ¹⁄₂₀₀ s. With compatible flash units, auto FP
high-speed sync will automatically be enabled at shutter speeds faster than
¹⁄₂₅₀ or ¹⁄₂₀₀ s.
In modes P and A, auto FP high-speed sync will be activated if the actual
shutter speed is faster than ¹⁄₂₅₀ or ¹⁄₂₀₀ s. If the flash supports auto FP
high-speed sync, the camera can select shutter speeds as fast as ¹⁄₈₀₀₀ s.
In modes S and M, the user can select shutter speeds as fast as ¹⁄₈₀₀₀ s
when using flash units that support auto FP high-speed sync.
Flash sync speed set to selected value, which can be from ¹⁄₂₀₀ to ¹⁄₆₀ s.
G button U A Custom Settings menu
Description
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e1: Flash Sync Speed