Question about Vivitar Cameras

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I have a Vivitar 285HV flash and I'm wondering if the firing voltage is low enough to use with a Canon Rebel Xs digital camera?

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I know some older vivitars do have trigger volts in excess of 100v. If you have a friend with a voltmeter you can measure yours, but in any event it is not worth the chance of frying your camera, buy a slave and connect the vivitar to that, they aren't that expensive (one which you can use with pre flash is best).Look on Amazon or ebay for examples (flash trigger slave etc.)
regards

Posted on Mar 22, 2011

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According to Vivitar, the 285HV has a trigger voltage of 12V, which should be safe for use with modern digital cameras.

Posted on Mar 22, 2011

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1 Answer

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Not recommended. Older flashes have the full voltage across the hot shoe contact. If that voltage touches one of the dedicated contacts in the hot shoe it will damage the circuit of the camera. 300+ volts does major damage to 6 volt circuits!

To test the flash, measure the voltage between the hot shoe contact and the metal contact on the side of the hot shoe. If the flash is fully charged and you measure 300 volts then the flash should not be used.

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Can I use the vivitar 285HV flash for a canon S5 IS?


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My canon rebei xs will not work at night,when it is too dark it will not take pictures, like the flash will not work or fire. WHY


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Vivitar 2000 with canon xs


Trigger voltage doesn't have anything to do with the power source. Even though you're only giving it 6V (4 1.5V batteries), it ramps it up internally for the photo tube.

Old cameras used a mechanical switch to fire the flash, so the voltage didn't matter.

New cameras, like your XT, have an electronic switch and eventually will burn out, like Anonymous said. They want 6V at the hotshoe. You're giving it 56V... I know it works now, but it'll fry it eventually. You can get a hotshoe adapter that will isolate the voltage from the camera.

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Can I use my Vivitar 385 with my Pentax K200?


Yes, you can use the flash if your camera has a PC connector.

Or, check the trigger voltage: under 7VDC = OK on hotshoe.


atlee@netzero.com

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3 Answers

Will a Vivitar 285HV fry my Canon EOS 40D? I'd like to experiment with a Vivitar 285HV as an on-camera hot shoe flash. However, I'm reluctant to proceed because of conflicting reports about voltage...


Personally, I would not try it. While the Canon has a protection system built into the camera, the trigger voltage on the Vivitar is pretty high. I have had good results using a 283 on a slave shoe, you will have to stop down more with the extra light

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