Second-Curtain Synchronisation (Rear) - Metz SCA 3402 M10 Manual Del Usuario

6.10.2 Second-curtain synchronisation (REAR)

Synchronisation with the shutter's second curtain
(REAR) is particularly advantageous when shooting
moving objects that have their own source of light
with a slow shutter speed (more than 1/30 sec.).
2nd synchronisation gives a more realistic impres-
sion of movement because the light streaks behind
the light source instead of building up in front of it
– as is the case with 1st curtain synchronisation.
First-curtain synchronisation
Second-curtain synchronisation
If second-curtain synchronisation is selected the
flash is not triggered at the moment the first shut-
ter curtain opens, but a fraction of a second before
the second shutter curtain is starting. If a slow
shutter speed has been chosen, or in the „bulb"
mode with the corresponding aperture, the existing
ambient light level permits traces of moving lights
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