Canon 550EX User Manual
Page 35
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FE Lock
Check the flash exposure level in the
viewfinder, then take the picture.
For this shot, FE lock was used for the
subject’s face before the picture was
recomposed. FE lock prevented the
wall’s bright reflection from throwing off
the exposure. The subject was thus
correctly exposed.
If the subject is too far away to obtain a correct flash exposure, i will blink In the
viewfinder. Either move closer to the subject or use a larger aperture (smaller f-
number) and try again.
FE lock cannot be used if the 550EX is set to the M (Manual) flash mode. With the
EOS Elan IIE/50E/55 and EOS IX, the
i
icon blinks in the viewfinder to warn that FE
lock cannot be used in the M flash mode.
SI
The FE lock's preflash fires at about 1/32 output.
With Type-A cameras other than the EOS-3, the AE lock button functions as an FE
lock button when the 550EX is recharged and ready.
If the subject is small, using FE lock might not make any difference.
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