High-Speed Sync (Fp Flash) - Canon Speedlite 420EX Instruction Manual

High-Speed Sync (FP Flash)

When the flash mode is set to high-speed sync (FP flash), the flash can
synchronize with shutter speeds faster than the camera's fastest sync
speed. When high-speed sync is set, the <
• High-speed sync can be used in the < >, <
• High-speed sync is effective when you want to:
(1) Blur the background for a daylight portrait.
(2) Create a catchlight in the subject's eyes.
(3) Soften harsh shadows on the subject's face.
With FP flash.
> icon lights in the viewfinder.
>, <
1 Set the desired picture-taking
mode.
2 Set the high-speed sync switch to
< >.
>, and < > modes.
With normal flash.
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