Third Party Manufacturers / Re: 6D and Yongnuo: Anyone used YN-568EX and/or YN 622c triggers on a 6D yet?« on: January 25, 2013, 09:14:04 PM »
Update on 622c with 6D: I found that one transceiver gives me different exposures than the other when on Camera. Also when the flash goes to sleep the one transceiver can wake it up. The other transceiver does not does not.It is likely that there is no problem with the 622s.
When you place a transceiver on a camera, the transceiver's settings are applied to the camera's flash control menus. If one has an FEC of zero and the other has FEC -1, the camera will behave differently, according to the unit mounted. There are other settings that do that. It can be worth using one as a dedicated transmitter to avoid this hidden change.
You may have found "The Other YN-622C User Guide" helpful.
PS I have tested the 6D with the 622s, and they performed flawlessly in all features except one. I couldn't find the DOF button to test the modelling light before the 6D was wrenched from my grasp.