Canon EOS D30 - Manual (Page 98)

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FEB (Flash Exposure Bracketing)
With the 550EX Speedlite, FEB (flash exposure bracketing) automatically shoots three flash
shots, bracketing the exposure by as much as ±2 stops in 1/2-stop increments, without
changing the background exposure.
Normal exposure (0) Underexposure (-1.0) Overexposure (+1.0)
● FEB is applied from the 550EX Speedlite. For details, see the User’s Guide for your
Speedlite.
● For best results use
〈 〉
(single-image shooting) drive mode. (→67)
You can set the camera to change FEB settings in 1/3-stop increments. (C.Fn-4 → 124)
Flash Photography with the EOS-Dedicated 550EX Speedlite
High-Speed Sync (FP Flash)
When the 550EX Speedlite is set to high-speed sync
〈 〉
mode, it can automatically
synchronize at any shutter speed of 1/200 second or faster, thus providing high-speed sync
(FP) flash operation. When high-speed sync is On, the
〈 〉
icon appears in the viewfinder.
High-speed sync is effective for portrait photography in the following situations:
(1) When you want to use daylight sync flash for a portrait, and widen the aperture (reduce
the aperture value) to blur the background.
(2) When you want to produce a catchlight in the subject’s eyes.
(3) When you want to use fill flash to eliminate shadows.
Normal flash FP flash