Canon 580EXII Master Mode
I have tried to use my Canon 580EXII on a V6 Recever and activate the Master option to controle my Canon 430EXII that was set on Slave.
I got two issues with the 580EXII on the V6
1- I can't put the Master mode on TTL. It needs to set the flash on manual mode and set the Manual flash mode in the V6. (When the flash is directly on my camera I don't have this issue and can controle my other flash no problem)
2- Once I have this setup above in place, my synch speed goes down to 125th of a second.
note that I have the most recent firmware install in both my V6