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Old 19-10-06, 16:47
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John John is offline  
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Join Date: Dec 2005
Location: Southwell
Age: 93
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Originally Posted by John View Post
Thank you Don I will read them to night got to go out in 15 minutes.

John
Don, I am back now. Thank you again for those informative links. I have now had chance to read them and here is the relevant information that I have gleaned. The trigger voltage on the later Vivitar 283 flashguns is 5 volts. The earlier models have a higher voltage but the actual value was not stated. However, I learned that it appears as a constant voltage across the positive and negative contacts of the hot shoe, so I was easily able to measure it on my particular model and it is 8 volts. Canon EOS cameras use 5 volts so the trigger voltage on my Vivitar 283 is too high for constant use. It seems then that I was wise to always trigger it with a slave unit.



John.
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