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Thread: Help diagnosing 7x17 light leaks (not a newbie, but still)

  1. #11
    Vaughn's Avatar
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    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Perhaps; the other two show fogging along the outer edge of the rebate. The only way I can figure that could happen is out of the holder. I doubt light can pipe that far under the film rail.

    If you have a collection of negatives that show a progression in the degree of fogging (all at the same end), then the worst was on the top of the stack and the least at the bottom when they got light-struck. The anti-halation layer provides some protection for the lower sheets of film.
    "Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China

  2. #12

    Join Date
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    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    How many holders do you have? Are they double sided? If double sided do you get leaks on both sides or just one?

    My money is on the holder(s). Light can travel pretty darn far into a holder if the light trap is trashed for some reason.

  3. #13
    William Whitaker's Avatar
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    May 2002
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    NE Tennessee
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    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    I don't understand how a back can be made for a Folmer & Schwing 7x17 because the Folmer & Schwing banquet camera have an integral back which is not removable. What exactly did Mr. Ritter make?
    I'm just trying to visualize the camera itself. For now Vaughn's suggestion seems to make a lot of sense.

  4. #14
    New Orleans, LA
    Join Date
    Oct 2004
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    639

    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Even once you diagnose the problem I would suggest ALWAYS have the dark cloth over the back when you put a holder in, pull the dark slide, and remove the holder from the camera. These old cameras are so damn finicky.

  5. #15

    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Image number two is bellow vintage.
    Richard T Ritter
    www.lg4mat.net

  6. #16

    Join Date
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    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Ok, obviously more testing is needed. The holders are fairly new and in good shape, and the other negs I developed from a different box have no fog, so will dev some more and report back. Thanks everyone for the help so far.

  7. #17

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    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    William,
    He replaced the original w a bail back and changed the rib in the back into a channel so it could accept korona style holders, but he can obviously explain the procedure in more detail if he's reading.

  8. #18

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    Tel Aviv
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    439

    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Well it looks like Vaughn was right, the film is the problem, so that's an easy fix. I deved another batch, half from the problem box and half from a different one, and the ones from the problem box show the same kind of fogging along the flap end and somewhat along the rebate, while the other film has none, as before. Given that all were shot in similar conditions w exactly the same equipment, the only variable is the film. Thanks all for your help.

  9. #19
    Lachlan 717
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    Apr 2007
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    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Good outcome!

    Now, go forth, shoot and post the results.
    Lachlan.

    You miss 100% of the shots you never take. -- Wayne Gretzky

  10. #20

    Join Date
    Sep 2018
    Posts
    139

    Re: Help diagnosing 7x17 light leaks (not a newbie, but still)

    Glad it was not the camera or holder. Those are expensive. Were these new boxes of film?

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