Canon 550 EX - Manual (Page 98)

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7. Second-Curtain Synchronization
Normally, the flash fires in synchronization with the first shutter curtain when
the shutter is fully open. With second-curtain synchronization, the flash fires
immediately before the second shutter curtain closes at the end of the
exposure. With second-curtain synchronization and a slow shutter speed, you
can create a trailing blur (illuminated by ambient light) that trails a moving
subject (illuminated by the flash) to give a natural-looking illusion of motion.
Set the desired picture-taking mode
with the camera.
Press the < > and < > buttons
simultaneously to select on the
LCD panel.
• Each time you press the < > and < >
buttons simultaneously, the display changes
in the following loop:
Check that the icon is displayed in
the viewfinder, then take the picture.
1
2
3
With second-curtain synchronization. With first-curtain synchronization.
• Second-curtain synchronization is easier with buLb.
• Second-curtain synchronization does not work with the camera’s
picture-taking
mode and Programmed Image Control modes.
• To cancel second-curtain synchronization, press the < > and < > buttons
simultaneously to turn off the icon on the LCD panel.
(Off)
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