does anybody know if i can use the580exii as a dumb slave - and i'm talking flash in manual mode only. I am working with a small group of friends and we want to pool our equipment for shoots. Last night we were testing what flashes would work in what configuration with which camera. And the only two flashes we couldn't get to work as dumb slaves were the 580exii and a flash.
I've looked in the flash manual and it doesn't mention anything. I set the flash as a slave but still it wouldn't work.
Any thoughts anyone?