Canon 550EX - Manual (Page 98)

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.
H Set the desired picture-taking mode
' with the camera.
o Press the <-i-> and <-> buttons
^ simultaneously to select H» on the
LCD panel.
• Each time you press the < -E > and < — >
buttons simultaneously, the display changes
in the following loop:
I----------------- ► №►---------------------- 1
Check that the i icon is displayed in
the viewfinder, then take the picture.
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 <-E> and < —> buttons
simultaneously to turn off the icon on the LCD panel.
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