Hi!
I've read the very interesting article by M. Reichmann about the ST-E2:
http://www.luminous-landscape.com/reviews/st-e2.shtmlI shoot alot low light action (concerts) with sometimes fast
moving subjects and very variable lighting. I keep having
problems with the AF and its really annoying to know I've
just missed the greatest expression on the singers face due
to a hunting AF.
The ST-E2 seems to be a solution here. As is a normal Flash
with its AF Assist beam. But a normal flash (like the 580ex)
don't emmit a focus assist beam in any mode other than
one shot. Canon CPS Knowledgebase says that one shot
provides the best performance in low light (now talking without
af assist), but I still have my hopes up that the ST-E2 would
provide af assist in ai servo mode. Can anyone of you guys
confirm or falsify that information?