cheaper 580 EX II for wireless use with ST-E2
I have a Sigma DG530 Super (canon version) that works with my 580 EX II as a master and they're fairly inexpensive. I don't know if it will work with the ST-E2, but I'll bet a google search will find posts from folks who have tried. I can say it works poorly as a master with 580 EX II as slave, very intermittent. I suspect it would work well with other DG530's as slave.
|Child and seal by APenza|
from Kids world
|Calatrava in Reggio Emilia by NCV|
from Your City - Telelens in the City
|Aurora's, Science and the Milky Way by man4mopar|
from My Best Photo of the Week