Setting the master/slave channel – Canon 550 EX User Manual

Page 101

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101

3. Setting the Master/Slave Channel

To prevent your master unit from firing another photographer’s slave units,
four channels are provided to differentiate your slave units from unrelated
ones. The master unit and slave unit(s) in the same wireless flash system
must be set to the same channel No.

Press the master unit’s <

>

button and select

M or .

• The TTL mode cannot be used with wireless

flash photography.

To set the master unit’s channel No.,
press the <

> button and

select .

• Pressing the <

> button changes

the selection in the following loop:

1

2

Press the <

> or <

> button to set

the channel No. (1, 2, 3, or 4).

3

Flash output

(Off )

08. F073-E (99~) 02.4.1 2:16 PM Page 101

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