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13.4 Second curtain synchronisation (2nd cur-
tain, SLOW2)
Some cameras offer the option of second-curtain
synchronisation (2nd curtain mode), in which the
flash unit is not triggered until the end of the expo-
sure time.
This is particularly advantageous when used with
slow shutter speeds (slower than 1/30 sec.) and
moving subjects that have their own source of light.
With second-curtain synchronisation, a moving
light source will trail a light streak instead of buil-
ding one up ahead of itself, as it does when the
flash is synchronised with the first shutter curtain.
Second-curtain synchronisation thus produces a
more „natural“ image of the photographic situation
when there are moving light sources. Depending on
its operating mode, the camera sets shutter speeds
slower than its sync speed.
The synchronisation of the 2nd shutter curtain is
set on the camera (see the camera's operating
manual)!
Use a tripod to avoid camera shake with slow shut-
ter speeds!
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