Canon 550EX - Manual (Page 34)

2. FE Lock
You can use FE (flash exposure) lock with Type-A cameras. This is the flash
version of AE lock. With FE lock, you use spot metering to obtain the correct
flash exposure reading for a specific part of the subject.
• FE lock works with E-TTL and high-speed sync (FP flash)
H Select a picture-taking mode with the
’ camera.
2
3
Focus the subject.
Aim the viewfinder’s spot metering
circle over the part of the subject to
be metered. Then press the
button on the camera. FE lock
remains effective for 16 sec.
• The 550EX fires a prefiash to obtain an
exposure reading. The reading is retained in
memory.
• The focusing point iinked to the FE lock
lights in red
• FEL is displayed In the viewtinder tor 0.5
sec.
• You can also press the button again
to obtain an FE-lock reading tor another part
of the subject.
• To cancel FE lock, wait until 16 sec. elapse
or press the , , or <[!]>
button on the camera
C.S 0.7 1 2 3 4 E a ta te
4
5
Recompose the picture as desired.
Check that the subject distance is
within the flash range displayed on
the 550EX’s LCD panel.
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