D200 and flash trigger voltage

Discussion in 'Digital SLR' started by No Way, Jan 27, 2008.

  1. No Way

    No Way Guest

    Does anybody know if the Photogenic Powerlight 1500SL trigger voltage is
    too high for the Nikon D200?
     
    No Way, Jan 27, 2008
    #1
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  2. According to the manufacturer, older Photogenic units have a trigger
    voltage between 12 and 15 volts:

    http://www.photogenicpro.com/customer_service/FAQ.asp

    When in doubt, I relax, don't worry, and use a Wein Safe-Sync.
     
    Michael Benveniste, Jan 27, 2008
    #2
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  3. No Way

    Bugs Guest

    Thanks

    I'll look into the wein safe sync
     
    Bugs, Jan 27, 2008
    #3
  4. No Way

    ____ Guest

    According to Nikon technical support when I called them, I was told the
    D200 is safe for flash up to 250 volts. Thats DC current- BTHW. What's
    interesting that is; since the Nikon flash SB800 and SB600 have trigger
    voltages around 3.3 volts at the pins, I wonder how accurate that
    information is.

    Since the D200 has a PC connection you have multiple options with regard
    to the Wein Products Pronounced "Wine".

    You can view them all at:

    www.omegasatter.com
     
    ____, Jan 27, 2008
    #4
  5. It's peak *voltage*, *not* "DC current", and doesn't
    really matter if it is DC or AC. (Just keep in mind
    that most AC voltages are not described in terms of a
    "peak voltage", but as RMS or some other form.)

    The point is that no voltage under any circumstance
    should approach 250 volts on the D200 flash sync lead.
    It is probably very conservative.

    The trigger voltages for the Nikon flash units are not
    related in any way. They must also work on many other
    cameras, some of which cannot tolerate more than 6 volts
    on the sync lead.
    <http://www.weinproducts.com/safesyncs.htm>
     
    Floyd L. Davidson, Jan 27, 2008
    #5
  6. No Way

    ____ Guest

    Can you prove there is a higher backfeed of current?

    If your using a volt meter it matters, you can't read AC current with a
    DC reading meter, can you?


    (Just keep in mind
    that most AC voltages are not described in terms of a
    "peak voltage", but as RMS or some other form.)

    As in cycles :)

    The point is that no voltage under any circumstance
    should approach 250 volts on the D200 flash sync lead.
    Omega Satter is the distributer and has more in depth an in most
    instances more recent product info.
     
    ____, Jan 28, 2008
    #6
  7. Why would I, and what is "a higher backfeed of current"?

    My point was that you don't care about current, you care
    about peak voltage.
    If you are smart enough, yes. But the point is that
    using a plain DC DVM is probably not going to give an
    accurate reading.

    It should be looked at with a scope, though I'll grant
    that if a DVM gives a relatively low static reading (say
    40 volts), I wouldn't be too concerned. But if it is
    190V, I'd get a scope to be positive.
    No. "Root Mean Square" gives you the same *effective*
    values as you would have for DC at that value. It's
    useful for power calculations.
    I didn't find much of anything on the omegasatter page.
    One product, and not details.
     
    Floyd L. Davidson, Jan 28, 2008
    #7
  8. No Way

    tomm42 Guest


    I was told the max power on a D200 synch cord is 67 volts, but only 12
    volts on the flash shoe, surprising how many older flashes excede
    this. Wein safe synch is the way to go if you are in doubt.

    Tom
     
    tomm42, Jan 28, 2008
    #8
  9. No Way

    ____ Guest

    A Higher voltage at the moment that the flash is triggered.
    That way I understand the PC connection is the your basically just
    closing a loop and the volts read at the pins of shoe flash or the pin
    and shield represent the trigger voltage of the flash in question:
    unless there is a surge (back-feed from the pack that produces a higher
    spike) beyond the reading I just referred to.

    Granted you can mathmatically translate DC to AC.
    I've actually measured and been shocked by a few of those kind :)

    One most plug "Wein" into the search on the front page, you'll get all
    the items listing that way and yes they have a rather kludgey website.
     
    ____, Jan 28, 2008
    #9
  10. Okay. (Why call it current? That is *not* the same as voltage.)
    One possibility is that if there is any amount of
    inductive reactance in the circuit, it might very well
    have a spike. The other problem is that DVM's read
    average voltage, and if the actual voltage is only there
    for a short time, the voltage read by the DVM may or may
    not be accurate.

    Using a higher quality oscilliscope to measure the
    voltage is a better method.
    Forget about AC and DC. That has nothing to do with it.
    Peak voltage is all that counts.
     
    Floyd L. Davidson, Jan 29, 2008
    #10
  11. No Way

    ____ Guest

    Most people don't them laying around -though.
    Never said it did - point taken though.
     
    ____, Jan 29, 2008
    #11
  12. Most people should not expect to accurately determine
    what the voltage is. They should defer to those who
    have the equipment _and_ the know how.
    You kept making statements about AC, reading AC with a
    DC meter, etc. etc. All of which was nonsense.
     
    Floyd L. Davidson, Jan 30, 2008
    #12
  13. No Way

    ____ Guest

    Yes & your PITA too :)
     
    ____, Jan 30, 2008
    #13
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