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Wireless Selector
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If the 550EX is to be used as a normal, on-camera Speedlite but the wireless selector
has been set to or , the following applies:
: If master flash ON has also been set, it will be the same as using the
Speedlite at the wireless selector’s OFF setting. If master flash OFF has
been set, a picture cannot be taken.
: It will be the same as using the Speedlite at the wireless selector’s OFF
setting. However, when the camera’s exposure meter turns off 6 sec. after
the shutter button is pressed, the 550EX will be a slave unit.
• If the wireless selector is set to and master flash OFF has been set, the
flash will not fire. (see page 57)
• When the wireless selector is set to or , the flash coverage is set
automatically to . The Guide No. decreases as a result.
02. F073-E (9~) 02.4.1 2:08 PM Page 15