[5] Manual or Stroboscopic Flash With a Slave Unit

Manual flash or stroboscopic flash can be set manually with a slave unit. The setting is independent from the master unit. The master unit just triggers the slave unit which fires according to its own independent (manual or stroboscopic flash) setting. This feature can be used in the following situations:

(1)As with studio flash, you can set the slave unit’s flash output yourself for wireless manual flash photography.

(2)For wireless manual flash photography with Wireless Transmitter ST-E.

1. Setting Manual Flash With a Slave Unit

On a slave unit with the wireless selector

to < >, press the < > button for at least 2 sec.

M will start blinking. It will continue to blink while the slave unit’s independent setting is in effect.

To set the flash output, see page 44.

To determine the proper flash exposure, use a hand-held flash meter.

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Canon 550EX manual Setting Manual Flash With a Slave Unit, Manual or Stroboscopic Flash With a Slave Unit