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

FEB (Flash Exposure Bracketing)

By setting FEB (flash exposure bracketing) <> with the 550EX, you can bracket the flash exposure up to +/-3 stops in 1/2-stop increments. The flash output is changed automatically for each bracketed shot so that the background exposure level remains the same.

Standard exposure (0)

Decreased exposure (–1.0)

Increased exposure (+1.0)

●FEB is applied from the 550EX Speedlite. For details, see the Instractions for your Speedlite.

●For best results use < > (single-frame shooting) drive mode. (→63)

You can set the camera to change FEB settings in 1/3-stop increments. (C.Fn-4-1→122)

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