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Thread: High-Speed Sync for Speed Graphic

  1. #1

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    High-Speed Sync for Speed Graphic

    I want to use a strobe in conjunction with the focal-plane shutter in my Speed Graphic. Normally, one uses slow-burn flashbulbs because the shutter has vertically sliding slots -- different widths for different speeds. Regular strobes are way too fast and therefore only expose a small part of the frame.

    High-speed sync simulates a slow-burn flashbulb by firing many times in rapid succession while the focal-plan shutter wipes across the film.

    My question is: Has anyone figured out to connect the Speed Graphic's flash contacts to a strobe (or trigger) for high-speed sync with anything like Godox or any other strobes?

    ...doug

  2. #2
    Tin Can's Avatar
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    Re: High-Speed Sync for Speed Graphic

    https://www.bhphotovideo.com/c/produ...to_Bipost.html

    However they are a tight and hard fit

    I think you need to use slow shutter speeds and let the flash stop the action

    I sometimes shoot without lights on
    wear mask or NOT

    is ???

  3. #3
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    Re: High-Speed Sync for Speed Graphic

    Physically connecting the flash should be simple enough with a bipost sync cord. I think what you need to find out is the travel time of the SG shutter curtain at different tension settings compared to the travel time of the small, bladed focal plane shutters in modern SLR and mirrorless cameras for which HSS has been promoted. My guess is that the Speed Graphic curtain will be way too slow, that the HSS flash pulse sequence won't last nearly long enough to cover it. And if it does, the power will probably be so attenuated that it's not especially useful. But it's a great question, I too would like to hear about it if someone has found a way to make it work.

  4. #4
    Tin Can's Avatar
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    Re: High-Speed Sync for Speed Graphic

    Searching, https://news.ycombinator.com/item?id=16107292
    https://www.photo.net/discuss/thread...on-d70.125993/

    Don't know OP's plans, need more input

    I settle by using Packards and Dial Set shutters at 1/30th with any strobe
    wear mask or NOT

    is ???

  5. #5

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    Re: High-Speed Sync for Speed Graphic

    Tin Can has a point.

    OP, why must you use your Speed's FPS?

  6. #6

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    Re: High-Speed Sync for Speed Graphic

    It can’t be worth the effort...

  7. #7

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    Re: High-Speed Sync for Speed Graphic

    Doug, I seem to recall that (some?) pacemaker graphics had synch contacts on shutter curtain... for FP bulbs. But your talking about retrofitting your Anniversary... right? If so, perhaps you need a second camera.

  8. #8
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    Re: High-Speed Sync for Speed Graphic

    Quote Originally Posted by Dan Fromm View Post
    Tin Can has a point.

    OP, why must you use your Speed's FPS?
    Dan, my guess is that it won't work. But if it did, it would be a welcome option for Graflexes with barrel-mount lenses.

  9. #9
    Tin Can's Avatar
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    Re: High-Speed Sync for Speed Graphic

    Arenít the Speed curtain sync contacts only in one place or opening?

    That has messed me up before
    wear mask or NOT

    is ???

  10. #10

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    Re: High-Speed Sync for Speed Graphic

    Quote Originally Posted by Tin Can View Post
    Aren’t the Speed curtain sync contacts only in one place or opening?

    That has messed me up before
    Not sure, but seem to recall some limitations. But don’t have any experience with that feature. A search of a user manual would answer that question. I’ll bet my 1966 PM 3&2 course book would say... will look up later if I can.

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