Setting Up a Wireless Flash System
To set the 550EX as a slave unit, refer to page 53 in the 550EX's Instructions booklet.
Set the same channel No. as the
ETTL mZoom 2lfmm | master unit. |
| |
| c |
| Set the slave 10 to C. |
After setting up the wireless flash system, position slave C as shown in the left diagram.
•When indoors, position the slave unit within 5 meters from the master unit. When outdoors, position it within 3 meters. The slave unit should also be within an
•Face the slave unit'stransmission sensor toward the master unit.
•Indoors, the transmission signals can bounce off the walls so the slave unit's positioning can be a little more flexible.
•Do not place any objects between the master unit and slave unit which may obstruct the wireless transmission.
Check that the master unit'spilot lamp is lit and that slave C is
~When the slave unit is
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