Flash Voltage limitations?

[zigsig40]

When I had my G1, there was a lot of information about the consequences of exceeding the 6V sync voltage of non-canon flashes. I have read nothing on this subject in my owners manual, not even for studio lights in the sync socket. I'm wondering about using my Vivitar 285 (8v) and it's external sensor.( my 420ex measures only thru the lens). Thanks, Sig.

[robertwgross]

This is for a Canon EOS digital camera?

---Bob Gross---

[zigsig40]

Sorry, I got carried away. My question is in referrence to the 10D. Sig.

[DAMphyne]

I don't know about the 10D, but My D30 just gave up working with Flash. I've been using my Novotrons since I bought the D30, and have no problems until Wednesday.
I can't get the camera to set-off the flash, with the sync cord plugged into the camera body, nor with a hot-shoe addapter.
Also the 420EX, and the built-in won't produce a proper exposure.
My camera guy says to send it in, probably caused by incorrect voltage in the flash-sync. Works fine without the flash, I need a voltage controller and another D30.
I hope someone answers Your question, it may pertain to My problems.





Digital set Me Free: http://www.damphyne.com/

[aripeka_john]

If memory serves correctly, Chuck Westfall of Canon stated that studio flash should not exceed 5V. If it does, wireless or IR sync must be used.

[raymond_anthony]

how do you measure for the 5volt spec?

[daveh]

I suppose there may be some precise criteria for measuring this but for me, simply applying a DVM to my charged Vivitar 283 and seeing several hundred volts was a "good enough" method.

[zigsig40]

You would measure the Voltage from the bottom middle contact to the side contact, usually in the shoe slot.
Go to www.botzilla.com/photo/strobeVolts.html to see flashes and their measured voltages. Sig.