Nikon Z9 Mirrorless Camera - Manual (Page 638)

638 A Custom Settings: Fine-Tuning Camera Settings
D Auto FP High-Speed Sync
Depending on the shutter speed, horizontal lines may appear in pictures
taken using auto FP high-speed sync when [
1/250 s (Auto FP) ] or [ 1/200 s
(Auto FP) ] is selected. This effect can be mitigated by:
• choosing a slower shutter speed or
• adjusting flash output.
A Auto FP High-Speed Sync
Auto FP high-speed sync allows the flash to be used at shutter speeds as fast
as
1 /
8000
s. When [ 1/250 s (Auto FP) ] or [ 1/200 s (Auto FP) ] is selected, the
camera automatically enables auto FP high-speed sync at shutter speeds
faster than the flash sync speed. This makes it possible to choose the
maximum aperture for reduced depth of field even when the subject is
backlit in bright sunlight.