Canon 550EX manual High-Speed Sync FP Flash, With normal flash

High-Speed Sync (FP Flash)

5 Check that the icon is displayed in the viewfinder, then take the picture.

With normal flash. With high-speed sync.

•With high-speed sync, the Guide No. changes depending on the shutter speed (see page 121). The faster the shutter speed, the shorter the flash range will be. Check the

current flash range on the 550EX’s LCD panel.

• To cancel high-speed sync, press the < > and < > buttons simultaneously twice so that the icon on the LCD panel turns off.

•When high-speed sync is used in the manual flash mode, the flash output ranges from 1/1 to 1/128.

If you use fill flash in the Av mode with high-speed sync, you can use a faster sync speed than the normal X-sync speed.

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