Question about Vivitar 840AF AutoFocus Zoom Electronic Flash for Canon EOS Camera Flash

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Problems with older Vivitar flash and Pentax K-100 DSLR?

I read on one blog that sync voltages of older flash units can fry DSLR cameras.

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That is true. Older flashes used sync voltages as high as 250V. That much extra juice can quickly fry newer cameras. You can use a Wein Safe-Sync between the camera and the flash to electrically isolate the two.

Posted on Jan 24, 2010

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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.

Mar 04, 2015 | Pentax Cameras

1 Answer

Please can anyone suggest which flashguns are safe to use with a Pentax K20D without frying the electronics ? I have an old Vivitar 283, and a Pentax 240 AF, but would really like one with TTL response....


I would not use and old style flash gun on modern digital cameras the voltage acroos the points will indeed fry the electrics. Have a look at the Yougnuo range of flash guns Great functionality and not too expensive

Feb 23, 2015 | Vivitar Cameras

2 Answers

Can I use a Sunpak MG-1 (10+ yrs. old) with a Pentax K-5 II


The voltage across the points when fired is very high on old style flashguns if you try this on a modern digital camera you may fry the electrics in the camera. Get a flash gun that is compatible with your camera Have look at the Yongnuo range.

Feb 21, 2015 | Pentax Cameras

1 Answer

Can I use a Vivitar 2000 safely on a Pentax K100D camera?


NO!
Do not use this flash on your camera without something like this to protect the camera.

Jun 29, 2012 | Cameras

1 Answer

I got a DSLR Pentax K-r digital I would like to know if I can use my old Vivitar flash 2800


No. The trigger voltage on the 2800 is much too high, and will eventually fry a digital camera. You can use it as a slave, or isolated from the camera with something like a Wein Safe-Sync.

Jun 01, 2011 | Vivitar 2800 Flash

1 Answer

Can Film Camera lenses and Flash be used for Digital Camera Body


If u used to have a Pentax camera, i would recommend you buying a Pentax DSLR, because Pentax film lenses still works on Pentax DSLR. I still use some of my prime lenses on my K10D.

Jun 05, 2009 | Pentax MZ-60 QD 35mm SLR Camera

2 Answers

Vivitar 283 with new Nikon Digital camera


the nikon D80 has a 250 volts safe range and i have the same issue but readin on the internet i learned that yo can now the voltage of your flash with a voltage metter ond the hot soe.

Vivitar 283 has diferent ranges of voltages depending on the year of fabrication so older ones can achieve 300 volts and earlier have 230 volts so the best is to get a vivitar 285hv for about 75dollars or a safe sync for about 55dollars, you can find all on ebay or other brouser the safe sync converts up to 400 volts to a safe 6 volts that are yust the normal voltage for digital flashes.

Jan 06, 2009 | Vivitar 283 Flash

1 Answer

Switch from film to digital cameras.


I also own a Vivitar 285 that i used with my Canon F1 manual 35mm camera. Most older cameras before the advent of digital, had a hot shoe on top of the camera, or like in my case, the hot shoe went over the rewind knob. I also had to plug in a power cord from the 285 flash foot and the cameras PC connection in order for the flash to work on some other cameras. The Canon Rebel XTi has a TTL (through the lens) hot shoe usable with Canon's own EX flash units. You can buy a "hot shoe to PC connector" if the TTL camera hot shoe doesn't work, but be extremely careful, the only problem that exists with the older manual flash units was the trigger voltage is as high as 200+volts which would fry digital camera hot shoes. I tried my unit with a Wein flash trigger device on the PC cord of the flash and my Canon D60 with it's own flash. All shots were overexposed and washed out highlights.  Here's a copy of the hot-shoe review:h The EOS 400D's hot-shoe can be used with Canon and third party flashes (although sync only on most third party units). The hot-shoe is E-TTL II compatible. Compatible flashes include Speedlite 220EX, 380EX, 420EX, 430EX, 550EX, 580EX, Macro-Ring Lite, MR-14EX, Macro Twin Lite MT-24EX and Speedlite Transmitter ST-E2.  The Canon Rebel XTi doesn't have a PC socket to plug in a manual flash trigger cord which common sense tells me there is no provision to step up the voltage to trigger manual flashes - so my answer is this combination is not a good idea on a Canon Rebel XTi. Hope this helps.

Dec 12, 2008 | Vivitar 283 Flash

3 Answers

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

Oct 31, 2008 | Vivitar 285HV Flash

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

Jan 08, 2008 | Vivitar 285HV Flash

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