I currently have a pair of Sigma EF-500 DG Super flashes. I have a set of cowboy studio triggers (Cheap but they work). Anyway, when I have the flashes off camera they will not fire in manual mode. I left my flash manuals back home (in college now) and couldn't find a thread with people having this problem.
Does anyone have experience with this ordeal? I will try having one of the flashes on camera and the other next time I do a shootaround and see if that will get them to fire off camera in manual mode.