Canon Speedlite 550EX Instructions Manual page 35

The image was removed due
10 copynghl restrictioos
FE Lock
6
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 preven ted the
wall's bright reflection from throwing off
the exposure. The subject was thus
correctly exposed.
II the subject is too lar away to obtain a correct flash exposure,
~
will blink In the
vlewllnder. Either move closer 10 Ihe $ubjf!(:t or use a larger aperture (smaller 1-
number) and try again.
FE lock cannot be used
ij
the SSOEX Is sal \0 Ihe M (Manual) flash mode. With the
EOS Etan IIEISOEI55 and EOS IX, the
~
icon blinks in the viewlind&r to warn lIlai FE
lock cannot be used in
the
M flash mode.
The FE lock's ",eflash fires al about 1/32 output
With Type-A cameras other than the EOS·3. the AE lock bullon functions as an FE
lock bullon when the 550EX is recharged and ready .
II the subject is small, using FE lock might not make any differenc6.
35