TO
CREATE
NATURAL-LOOKING
STREAM
OF
UGHT-REAR-CURTAIN
SYNC
Normally
in
flash synchronization, the Speedlight fires at the
beginning
of
the exposure. When the shutter speed is low, the
result is
an
unnatural light pattern.
When Rear-Curtain Sync
is
set, the Speedlight fires at the end
of the exposure, turning available light into a stream of light that
follows the flash-illuminated moving subject.
Since Rear-Curtain Sync
is
especially effective at a slow shutter
speed, Slow Sync is automatically set at the same time that
Rear-Curtain Sync is set
in
the Auto-Multi Program
or
Aperture-
Priority Auto exposure
mode
. However, to set a desired shutter
speed, set the N90
to
Shutter-Priority Auto
or
Manual exposure
mode.
• When the SB-25
or
SB-24 is used, note that the Rear-Curtain
Sync setting on the camera
body
is ignored. So you have
to
set the speed light unit itself for Rear-Curtain
Sync.
• Rear-Curtain Sync cannot be set with Vari-Program
• Rear-Curtain Sync cannot be set if Red-Eye Reduction
(p.
144) has been set.
122
Rear
-C
urtain
Sync
with
low
shutter
speed
Front-Curtain
Sync
with
low
shutter
speed
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