I recently received a 155A and AE-1 as a gift. I'd like to learn how to use the manual flash on my Rebel XT rather than the AE-1 so I don't have to buy extra film and develop several rolls of bad pictures during the learning process. According to Jim Strutz, the voltage of the 155A is fine for EOS cameras. http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=002VKJ http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=009Oce But according to Kevin Bjorke's site, the 155A may be unsafe. http://www.botzilla.com/photo/strobeVolts.html I've tried the combo, and it works, but I have read that the bad effects of mismatched voltage can be subtle at first and/or cumulative. Can anyone else weigh in on the safety of this combination?