Canon Speedlite 580EX II Instruction Manual page 20

Creating a Catchlight
With the catchlight panel, you can create a catchlight in the subject's
eyes to add life to the facial expression.
Point the flash head straight ahead and then upward by 90°. The
catchlight will not work if you swing the flash head left or right.
For maximum catchlight effect, stay within 1.5 m/4.9 ft of the subject.
Closeup Flash Shooting
When shooting a subject within about 0.5 - 2 m (1.6 - 6.6 ft) away, hold
down the <z> button and tilt the flash head downward by 7° to
illuminate the lower part of the image.
Point the flash head upward by
1
90°.
Pull out the wide panel.
2
The catchlight panel will come out at
the same time.
Push the wide panel back in.
3
Push in only the wide panel.
Follow the same procedure as for
bounce flash.
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