Fe Lock; F High-Speed Sync - Canon SPEEDLITE 220EX Mode D'emploi

7 FE Lock

FE (flash exposure) lock locks the correct flash exposure reading for any part of
the scene. After focusing the subject, you press the camera's <7> button.
The FEL display will be shown in the viewfinder for 0.5 sec.
Each time you press the <7> button, a preflash will be fired and the
FE lock will be set again.
If the camera does not have a <7> button, press the <P> button.
If the subject is too far away and underexposure will result, the <Q> icon
will blink in the viewfinder. Move closer to the subject and try the FE lock
again.
If the subject is too small, FE lock might not be very effective.

F High-Speed Sync

With high-speed sync (FP flash), the flash can synchronize with all
shutter speeds. This is convenient when you want to use aperture
priority for fill-flash portraits.
If the flash exposure confirmation lamp does not light, move closer to the
subject and take the picture again. With a digital camera, you can also
increase the camera's ISO speed.
If the shutter speed is slower than the maximum flash sync speed, <F>
will not be displayed in the viewfinder.
With high-speed sync, the faster the shutter speed, the shorter the flash
range will become.
Press the <7> button.
Aim the subject at the center of the
viewfinder and press the <7> button.
The Speedlite will fire a preflash and
the required flash output for the
subject is retained in memory.
Press the <F> button and the
<F> lamp will light.
In the viewfinder, check that the <F>
icon is lit.
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