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Wireless e-ttl autoflash with flash ratio off, 2] wireless e-ttl autoflash, Master flash on -i- slave unit(s) – Canon 550EX User Manual

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Wireless E-TTL autoflash with multiple Speedlite 550EXs can be used in one

of two ways:

(

1

)

OFF : All slave units fire at the same flash output.

(2)

ON : Slave units with different slave IDs (A, B. or C) can be

tired at different flash outputs to produce a flash ratio.

• A flash ratio can be set only with the EOS-3.
• With the EOS Elan II-IIE/50-50E, EOS Rebel G/500N, EOS IX, and EOS IX Lite/IX7, a flash ratio

cannot be set with the master unit.

[2] Wireless E-TTL Autoflash

1. Wireless E-TTL Autoflash With Flash Ratio OFF

If no flash ratio is desired, the slave ID does not matter. It can be A, B, or C.

All the slave units will fire at the same flash output. The E-TTL autoflash
system controls the total flash amount automatically to obtain a correct flash
exposure.

• Master Flash ON -i- Slave Unit(s)

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