FP Zoom TTL - Advanced Sync Functions; High-Speed Sync (HSS); Second-Curtain Sync

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Set the ash sync speed to 1/320s
(Auto FP) or 1/250s (Auto FP) in the
Nikon camera menu. Press the
shutter button halfway. The icon
< > displayed on the ash
screen means the high speed sync
function is enabled on the ash.
Turning the camera command dial
can set the shutter speed to 1/250s
or faster.
To check if the FP ash function
works properly, look through the
shutter speed in the viewnder. If it
shows a speed of 1/250s or faster,
the FP ash function is on.
Set the camera to Rear curtain
mode and press the shutter button
halfway, the ash display panel will
show the second curtain sync icon
< >.
When the camera is not set to Rear
mode, pressing the shutter button
halfway will not light up the icon
< > on the ash display panel.
High Speed Sync (FP ash) enables the ash to synchronize with all
camera shutter speeds. This is convenient when you want to use
aperture priority for ll-ash portraits.
Select the high-speed sync icon < >.
High-Speed Sync
If you set a shutter speed as 1/320s (Auto FP) or 1/250s
(Auto FP) in the Nikon camera setting, < > will be
displayed in the ash screen regardless of practical
shutter speed.
With high-speed sync, the faster the shutter speed, the
shorter the eective ash range.
To return to normal ash, set the ash sync speed to other
options other than Auto FP. Then the icon < > will
disappear when pressing the shutter halfway.
Stroboscopic mode cannot be set in high-speed sync mode.
Over-heat protection may be activated after 10 consecutive
high-speed sync ashes
Second-Curtain Sync
With a slow shutter speed, you can create a light train following the
subject. The ash res right before the shutter closes.