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 <FEL>
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 <FEL> 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 <MODE>, <AF>, 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.
34