Thanks shay...i have just spent the past 30 mins loolking for my old AE-1 flash (its a 177 from memory) Cant find it to experiment with...guswife is the keeper of all precious things so i will have to wait til she comes home tomorrow to go look for it. Gus
Ok I'm back... What? You're offline? Sheesshh, I hope you're not burning up that 20D... Anyway, I found this link: http://photonotes.org/articles/eos-flash/index2.html#trigger and this link (actually, this is a pretty comprehensive one on older flash compatibility with newer EOS cams):…