Canon Speedlite 90EX Instruction Manual - Page 23
Using Fully Automatic Wireless Flash - wireless master
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Using Fully Automatic Wireless Flash Flash exposure compensation and other settings set with the master unit will also be automatically set in the slave units. Thus, you need not operate the slave unit(s). Wireless flash with the following settings can be done in the same way as with normal flash shooting. · Flash exposure compensation · High-speed sync (FP flash) · FE lock · Manual flash With FE lock, if even one Speedlite results in underexposure, the icon will blink. Increase the ISO speed, open the aperture, or move the slave unit closer to the subject. 21
21
Flash exposure compensation and other settings set with the master unit will also be
automatically set in the slave units. Thus, you need not operate the slave unit(s). Wireless
flash with the following settings can be done in the same way as with normal flash shooting.
·
Flash exposure compensation
·
FE lock
·
High-speed sync (FP flash)
·
Manual flash
Using Fully Automatic Wireless Flash
With FE lock, if even one Speedlite results in underexposure, the <
Q
> icon will blink. Increase
the ISO speed, open the aperture, or move the slave unit closer to the subject.