Question about Pentax AF-500 FTZ TTL Flash

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What is the trigger voltage for Pentax AF 500FTZ

I Have a Pentax K100D which I wish to use this flash on. Many thanks.

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When using a digital camera with a flash unit of unknown trigger voltage, you are risking the life of your camera. Excessive trigger voltages can disable the cameras internal circuitry to the point where it is totally beyond repair.

I do not have, in my files. the trigger voltage for the specified flash unit. I only have the specs for larger portables and studio flash gear.

A simple test , however, will reveal the exact trigger voltage. If you have a multi-meter or a DV voltmeter with a 250 VDC range (just to be in the safe side) you can preform this test at home or an electronics service technician can do it for you in a few minutes.

The test lead are placed across the synch contacts on the foot of the unit or plugged into the sunch socket if the flash unit has one. If the reading is more that 4 or 5 volts you can still safely use the flash with the aid of a protector device which goes in between the flash and the camera. Theses are available at better camera shops and dealers.

Ed

Posted on Dec 01, 2008

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1 Answer

I have Sunpak 622 Super Pro Handle Mount TTL Flash. Would it be compatible with a Pentax K50?


Before you attach it to your camera you must check the trigger voltage first, never use an old flash unit until you check the trigger voltage with a multimeter, most old flash units have a huge trigger voltage that will damage your camera.
Very simple to check the voltage on that Sunpak 622, turn on your volt meter and set it to about 200 volts DC, turn on your Sunpak flash and apply the RED lead to the bottom contact, apply the Black lead to the side of the hot shoe and look for the ground, usually a small metal piece on the side. Now look at the meter, if it shows a voltage of 6 volts or less then it is safe to use on your camera, if voltage is higher, say 12 volts or more, don't use it. A high trigger voltage will certainly mess up your camera in the long run. Even if it has a safe voltage of 6 volts or less, you will only be able to use that flash in Manual Mode, the newer cameras will not sync or recognize an old flash unit.
I have an old Vivitar flash unit that I can safely use on my Canon XTI because the old vivitar has a trigger voltage of 5 volts, safe for all newer digital cameras.

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Vivitar 2800 and 2800D are two different flashes. The first is an old flash, having high trigger voltage, which, as you will see, still can be used with your Fuji. The second is a member of modern flashes, having a low-voltage release. Manufacturers specify the highest applicable voltage at the trigger (hotshoe or PC) terminal; at most digital cameras it reaches several hundred volts.I believe, this is, what your seller was asking. As far as I know, Fuji doesn't mention this value in the user manual of the Finepix 9500, but I met reports of people, who called Fuji and asked that and the answer was 400 volts!
So the short answer is: buy any wireless trigger if you have the 2800D, and tell the seller the flash has about 200 volts if your flash is an older 2800.
I wonder if you did already use your flash with your Fuji?
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Good luck

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