Specifically, if one (not me- nope, no siree) has used an external flash of unknown trigger voltage successully in the past; does that mean that it will not fry the hot-shoe circuitry in the future? My limited understanding of electronics is that it would burn out the first time if it was going to; and it would not be a "wear and tear" situation if the potential were too great. Anyone have any comments on this?
Thanks in advance.