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7.2.2 REAR - Second-curtain synchronisation
Some cameras offer the facility of second-curtain synchroni-
sation (REAR mode) triggering the mecablitz by the end of
the exposure time. Second-curtain synchronisation is particu-
larly advantageous when using slow shutter speeds (slower
than 1/30 sec.) or when shooting moving objects that have
their own source of light. Second-curtain synchronisation
gives a more realistic impression of movement because the
light streaks behind the light source instead of building up in
front of it, as is the case when the flash is synchronised with
the 1st shutter curtain! Depending on its operating mode, the
camera uses shutter speeds slower than its sync speed.
The REAR function is only possible with cameras fea-
turing this facility. The corresponding setting is made
on the camera (see operating instructions of the given
camera).
7.2.3 Slow synchronisation / SLOW
In certain operating modes, some cameras permit slow flash
synchronisation (SLOW) which will provide added promi-
nence to the background at lower ambient light levels. This
is achieved by matching the shutter speed to the ambient
light. Accordingly, shutter speeds slower than the flash sync
speed are automatically adjusted by the camera. Some
cameras automatically activate SLOW synchronisation in
connection with certain programs (e.g. aperture priority
“Av” or “A”, night shots program, etc.) or permit slow syn-
chronisation to be set (see camera’s instruction manual).
Use a tripod to avoid camera shake with slow shutter
speeds!
8. Maintenance and care
Remove any grime and dust with a soft, dry or silicon-treated
cloth. Never use detergents that could damage plastic parts.
Forming the flash capacitor
The flash capacitor incorporated in the flash unit undergoes
a physical change when the flash unit is not switched on for
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707 47 0178.A2 36AF-4-CNOPS 05.06.2008 8:29 Uhr Seite 86