Scott (and others), after the mutiple posts/threads on wireless flash, I finally ordered an ST-E2 to go with my 2-580EXs...with plans to eventually add one more 580 (maybe 430, to save a few pennies).
It arrived today and I set out to read up on it. The good news is that it seems extremely easy to set up and is very light.
The surprise and bad news (both to me of course) is that I found out that the ST-E2 can only set up ratios between 2 groups (A:B). You need a 580/550 to do 3 groups....that is (A:B):C
In addition, it appears that if you want to use manual, instead of ETTL, mode, the ST-E2 requires each slave to be set manually, where the 550/580 can be set by the master. Also, FEB has an 'x' for the ST-E2 and an '0' for the 500...so I am assuming the ST-E2 cannot do FEB.
I am sure that this will fit many people's needs, but it was not the direction I was planning to head in. I will probably wait a few days, but at this point I think B&H will be getting it back.
Thought I would post this, in case others had the same confusion on the ST-E2's capability.
John


