Canon Speedlite 420EX User Manual

Page 26

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High-Speed Sync (FP Flash)

Take the picture.

• Focus the subject, check that the

<^H> icon is lit in the viewfinder, then

take the picture.

Using high-speed sync changes the Guide No. See page 50.

If you want to set the aperture, first set the camera to the < Av> or mode.

With high-speed sync, the Guide No. changes depending on the sync speed.
The faster the sync speed, the shorter the effective flash range will be.
To cancel high-speed sync, set the high-speed sync switch back to < • >.

When the mode is set for fill flash and high-speed sync is set, the sync
speed will not be limited to the normal sync speed. If necessary, a faster sync
speed will be set automatically in the high-speed sync mode.