I want to use my Graflite flash bulb flash on my Canon 5D Mk III.
- I know that modern DLSRs have a limit to the voltage and current that a flash can use when triggering, before it damages the camera.
- I know that most similar questions concern using older electronic strobes / flashes which can have too high a trigger voltage. My Canon for example can handle a maximum of 6 volts trigger voltage. That info is freely available.
- Camera flashes that use actual flash bulbs however, mostly have the opposite problem. In the case of my Graflite flash, the voltage is only 3 volts, BUT the triggering amperage / current is much higher than electronic flashes.
- I have built a circuit (No the Wein Safe-Sync does not work for this situation) to isolate the Graflite triggering current from the Canon's PC port.
My problem is that I can find nowhere, what the Canon 5D Mk III current limit in milliamps. I have called Canon more than once and they say that information is proprietary, and refuse to provide it.
So here is the question: I need to know if someone can tell me what the maximum milliamps a Canon DLSR can handle during the flash triggering sequence from the PC port.
I have my triggering circuit (That part that will connect into the Canon PC port) down to 4.85V & 70mA. But is that low enough?
I assume that someone with an electronic oscilloscope could connect a later model Canon flash to that scope and see just what triggering current is output from the flash. So, if anyone has such a scope and a Canon flash, I would really like to have that answer also.