Hi Pete, this page lists strobe voltages: http://www.botzilla.com/photo/strobeVolts.html
I can't find the allowed voltage the MZ-S can handle. Probably you can contact your national Pentax service. In Germany, they're very friendly on the phone.
Cheers, Pancho Pete Ziminski worried:
How do I know if my flashes will not damage my MZ-S. For example, will my 25yr old Vivitar 283 work? Pete

