Flash Photography with Speedlite 550EX

High-Speed Sync (FP Flash)

When the Speedlite 550EX is set to the high-speed sync mode (), it can synchronize at all shutter speeds, even those faster than 1/250 sec. When high-speed sync is enabled, <> is displayed in the viewfinder to indicate high-speed sync.

High-speed sync is effective in the following cases:

(1)When you want to use daylight sync for a portrait and maintain background blur with a large aperture.

(2)When you want to produce a catchlight in the subject’s eyes.

(3)When you want to use daylight sync to eliminate shadows

FEB (Flash Exposure Bracketing)

With the Canon Speedlite 550EX, three successive flash shots can be bracketed automatically up to +/–3 stops in 1/3-stop increments. The flash output is changed for the three shots while the background exposure remains the same.

Standard exposure (0). Decreased exposure (–2/3 stop).Increased xposure (+2/3 stop).

•Flash exposure bracketing is set with the 550EX. For details, see the 550EX’s Instructions booklet.

•The flash exposure bracketing amount set with the 550EX is indicated by the flash exposure level indicator in the camera’s viewfinder.

•Make sure the Speedlite 550EX is ready before taking the next bracketed shot. Single- frame shooting () is recommended.

C.Fn-06-2 enables the flash exposure bracketing amount to be set in 1/2-stop increments. (→p.134)

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