Canon 550 EX - Manual (Page 32)

1. High-Speed Sync (FP Flash)
When you set the synchronization mode to high-speed sync (FP flash), the
camera can synchronize with the 550EX at all shutter speeds. When high-
speed sync has been set,
is displayed in the viewfinder.
• High-speed sync can be used in the E-TTL and M flash modes.
• High-speed sync is especially effective for fill-flash portraits in daylight since you can:
(1) Obtain better background blur with a larger aperture.
(2) Create a catchlight in the subject’s eyes.
(3) Soften shadows on the subject’s face.
Select the camera's picture-taking
mode and the Speedlite's flash
mode.
• If you want to use a large aperture (smaller f-
number), set the Av or M mode.
Press the < > and < > buttons
simultaneously to select on the
LCD panel.
• Each time you press the < > and < >
buttons simultaneously, the setting changes
in the following loop.
Focus the subject.
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Check that the subject is within the
flash range displayed on the 550EX’s
LCD panel.
(Off)
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