« on: April 25, 2013, 07:05:14 PM »
Using the YN-622's you don't have any of the speedlites being 'master', that's what the Yongnuo triggers are for. You stick the transmitter on your hotshoe, and the receiver on the bottom of the speedlite and you have you're wireless RF TTL.
In order to get TTL you'd need a possibly very long cable, if it'd even work due to there likely being a max length for ETTL cable. Using PC-Sync triggering you have a very, very long max length, but you lose any TTL/remote setting and you need to make all the changes on the speedlite itself.
Hopefully all of that made sense. So short answer is, you don't need to worry about master/slave with that kind of wireless TTL system, however there are certain limitations. However they're a great deal, and I've heard nothing but good things, and if you eventually hit their limitations you'll work around them or there will be a new version that's fixed it or you'll just have to fork over for pocket wizards.