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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-Curtain
Sync with
low
shutter speed
Front-Curtain Sync with
low
shutter speed
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