Second-Curtain Sync - Canon SPEEDLITE 580EXII Mode D'emploi

r Second-Curtain Sync
With a slow shutter speed, you can create a light trail following the
subject. The flash fires right before the shutter closes.
Second-curtain sync works well in the camera's "buLb" mode.
To return to normal flash, press the <E> button again. The <r>
icon will disappear.
With E-TTL II/E-TTL, two flashes will be fired even at slow shutter
speeds. The first flash is only the preflash, and not a malfunction.
Stroboscopic flash cannot be set.
Wireless flash cannot be set.
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Press the <E> button so that
<r> is displayed.