Canon 550 EX - Manual (Page 70)

Wireless E-TTL Autoflash With Flash Ratio ON
● Wireless High-Speed Sync (FP Flash)
After setting up the wireless flash system with one or more slave units, you
can enable wireless high-speed sync by setting
on the master unit.
• You need not touch any controls on the slave units.
• The procedure for setting wireless high-speed sync is the same as for normal high-speed sync.
See page 32.
● Wireless FE Lock
After setting up the wireless flash system with one or more slave units, you
can enable wireless FE lock by pressing the camera’s <FEL> button.
• You need not touch any controls on the slave units.
• The procedure for setting wireless FE lock is the same as for normal FE lock. See page 34.
● Wireless Flash Exposure Compensation
After setting up the wireless flash system with one or more slave units, you
can enable wireless flash exposure compensation by setting the flash
exposure compensation amount with the master unit.
• You need not touch any controls on the slave units.
• The procedure for setting wireless flash exposure compensation is the same as for normal flash
exposure compensation. See page 36.
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● Wireless Flash Exposure Bracketing (FEB)
After setting up the wireless flash system with one or more slave units, you
can enable wireless FEB by setting the flash exposure bracketing amount
with the master unit.
• You need not touch any controls on the slave units.
• The procedure for setting wireless FEB is the same as for normal FEB. See page 38.
If there are multiple slave units and one of them cannot provide the proper exposure, the
icon in the viewfinder will blink as a warning. Either use a larger aperture or place the
slave unit closer to the subject and try FE lock again.
You can also set flash exposure compensation individually for each slave unit.
See page 36.
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