Guys, admittedly I've not tried to absorb the manual, but perhaps I'm missing something very basic.
Attached my new YN622C-TX to my 5D3, and my new TN622C to either of my flashes: a 580 EX or 550EX. When I adjust output on my 622c-TX either in TTL or manual I get zero difference in flash output.
1. I'm not doing it right since others have similar equipment and it works fine
2. The equipment won't work as I've combined them
3. No clue
Any help would be appreciated. Hoping to use them at a concert event Saturday night.