I'm new here, so don't know whether I'm in the right place but here goes. By way of introduction I live in Wales, UK and have been into photography for some twenty plus years - I have a few old Minoltas and now use a Sony Alpha 100 since it came out, and last week acquired an A77 to add to my collection which includes a Dynax 500si , Dynax 7 and 9. Anyhow my question relates to old flashes of which I have a number. The Vivitar 550fd works well on all the minolta cameras and the A100, since I bought the A77 I tested it on that and again it works well. However, this is a tilt only flash and no swivel. I also have a Jessops 280 ABZ that is both tilt and swivel, so before rushing out and spending some £300 on a new flash I wondered whether this one would work. Having checked the A77 manual it says that you can use any flash with a sync lead upto 400 v with opposite polarity. The Jessops flash is rated at variously (depending where you look) at between 70 -260v, I have tested it on a meter and it repeatedly peaks at flash burst at 70 volts. So in theory it should work, but obviously, it can be a very expensive mistake to make, if it goes wrong. Does anyone have any advice thoughts or experience in using these types of flashes on modern cameras.