Two wrote in post #9938960
my game plan involves some trial and error. I figured that I'd
play with the manual output of my flash until we find a combo
that works. For me, that's part of the fun factor.
I hope that this is possible. am I being naive?
It's possible, it'll just take a while to do trial and error - a light meter would help (it'll tell you what to set your camera at when you fire the flash in full on manual mode).
Personally, thats what I did for some time. When I shoot with *just* the 580, I use ETTL and let the camera figure it out. When I shoot in the studio, I switch the 580 to manual and use a wireless trigger (just a radio wave version of the optical plugin that I linked to above), I meter and am happy.