Canon 550EX manual Setting the Master/Slave Channel

Setting the Master/Slave Channel

5	Press the <		> or <	> button to
	set the same channel No. (1, 2, 3,
	or 4) as the master unit’s.
6	Press the <		> button.
	• The	icon and channel No. will be

displayed.

If the master unit and slave unit(s) are not set to the same channel No., the master unit will be unable to trigger the slave unit’s flash. Make sure the channel No. is the same.

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