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| p.1 #3 · Using Yongnuo YN-622C triggers with other flashes |
sma shooter wrote:
...The ETTL system allows me to control the power of the Canon flashes from the camera, but if the manual units are triggered by photoelectric cells, the ETTL pre-flash will fire the them prematurely. ...It seems to me that by switching to the Yongnuo units, I would be able to control the power of the Canon slave flashes in much the same way as the ETTL system works, and I could also fire any manual flash connected to one of the radio receivers. I believe that photoelectric cells on any additional flashes would also fire them in proper...Show more →
Yes, that will work, as long as the Speedlites are in Manual output mode. If they're in ETTL mode, the camera will command the Speedlites to fire metering preflashes that could trip the optically slaved strobes.
BTW, since the Canon Speedlites can work in Master/Slave mode in both ETTL and Manual modes, it's more correct to refer to this Master/Slave setup as the Canon Wireless system rather than the ETTL system.