mirror lockup? holy cow.
Well, if when i typed " also, i don't think this is the problem here", people thought i was saying this is what i think your problem is, i really don't know how to fix that.
as for the flash duration topic i mentioned, my studio strobes ARE slower than 1/500th under some conditions. that is one head, at higher power settings. many are.
I've posted before about my love of crappy flash synch speeds, and again, i know all about it, and why they suck. Nobody seems to understand how i don't care about all that, i'm 100% certain some clever guys could make it happen. hell, i've got a fairly good idea for a work around, but i haven't the time.
anyone care to argue with my recommendations for the OP?
BTW- with an alienbees trigger/receiver combo i could net 1/400th with a speedlight set on full tilt with my 1dmk2.
yes, i know it's aps-h, just saying.