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 fill flash 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 fill flash to eliminate shadows

With conventional flash.

With FP flash.

86

Page 86
Image 86
Canon EOS-1V HS manual High-Speed Sync FP Flash