Hi everybody,
I work with canon speedlights (580EXII set as Master and several 430 EX II as slave). When I want to use ratio with several slaves there is absolutely no problem with it (everything is explained in the manual with groups A and

.
It's another story when I want to use ONLY : 1 speedlight 580EXII as a Master and 1 speedlight 430EXII as a slave (using the Canon embedded flash management system (if I can call it so)).
The point is that I don't know how to change the ratio between the master and the slave.
I can either :
- use the Master with full power and change the ratio of the slave
- disable the light of the master and use only the slave
I would like to keep the ETTL feature (I cannot afford a pocket wizard now).
If someone happens to know how I should do I would be greatfull !
Thanks a lot for your help.
Regards
Christophe
PS : I apologize for my poor english.
(Toulon - France)
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