I am confused. When I was viewed this shot, I was dissapointed: http://photo.klein-jensen.dk/public/Dia_Hair_Web.jpg (66kb file) There's motion blur in it, at 1/125 sec. For some reason I remembered reading that rebel will sync at 200 with EX flashes and 125 with non EX. So naturally, I kept Av=10 and Tv=125 But 5 minutes ago, I took out the Drebel and took a shot at 200... the frame was white... I took a shot at 250... 100% white... 320... 100% white... Only at 400 did I get the bottom of the picture to be unexposed to the flash. And I am using 1/16th (lowest power) on my vivitar. So that should give a burst of light which lasts 1/10000th of a sec or something like that. I am sober BTW. But can't find my rebel manual. How is this possible?