Canon 550EX manual FE Lock

FE Lock

6 Check the flash exposure level in the viewfinder, then take the picture.

•If the subject is too far away to obtain a correct flash exposure, 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 icon blinks in the viewfinder to warn that FE lock cannot be used in the M flash mode.

•The FE lock's preflash fires at about 1/32 output.

•With Type-A cameras other than the EOS-1D, 1V, and 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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