Resident worry-wart here again! Just want to make sure that someone doesn't damage ther camera by misinterpreting certain information.

If you use a radio or photoelectric triggering system where the potentially offending unit is NOT directly wired to the camera and is being synchronized by a radio signal device or by acting as a slave to a safe on camera flash via a photo-cell, you are perfectly safe. If, however,you are using an older on-camera flash connected to a radio transmitter or transceiver, such as those made by Quantum or Pocket Wizard, where the on camera flash is directly connected to the on-camera transmitter, I am not sue if the radio will isolate the excessive trigger voltage from the camera. Of course, the receiver and the off-camera slave unit will have no affect on the camera regardless of the trigger voltage.I use this configuration all the time with older Lumadyne units- one is on the camera and the others are trigger by Pocket Wizard radios. As a precaution, I have the Wein adapter in place.

Worry #2- I think somebody wrote that they were gonna construct some kind of junction box whereby several flash unit will be directly hard wired to the camera. That can be dangerous even to a non-electronic film camera. If the sync contacts on the flash units are wired in series, the voltages will add up to the sum of all the voltages. If the are wired in parallel the current or amperage will increase- that can be worse. Some yeas ago there was a llittle 3 way=adapter that facilitated such a hook up- many shutter's sync contacts were damages as a result of using that thing- I think it was meant for flash bulbs but was continued to be sold for strobes- BAD!

Aside form sophisticates digital cameras and their complex circuitry, the basic synchronization mechanism in your camera's shutter acts like an ordinary light switch that fires the flash unit when the shutter is fully open and ready to sync with the flash. Of course it is much more delicate than an ordinary light switch and if there is excessive voltage or amperage (current), arcing or sparking can occur. This causes carbonizing or blacking of the contacts, eventually causing burning out- breakage or a kinda "welding" together of the contacts. Burning out will simply cause non-synchronization and fusing together will cause the unit to continuously flash as soon as it connected to the camera. As theses conditions are in the process of occurring intermittent failure will be ongoing until finally failure happens.

I offer this information just in case! You see, as a you photographer and electronic flash experimenter, I liked to TINKER! Suffice it to say, I blew up lot of stuff- nearly including myself. I once ended on the other side of my workbench and to this day, don't know how I got there.

If you have some oldie but goodie studio strobes or old mono lights in a studio-like set up- just use radios or photo-cells and don't worry about the trigger voltage- it won't hurt your radios or photo cells. Don't bother with malfunctioning or badly damaged old units. Again a little oversimplification- a damaged unit can cause high voltage to kinda back up into places where it should not be like in the outer body of the camera, the housing around the lamp heads or power packs or, shockingly, across the photographer's body!

Better safe than sorry.