Pre-Exposed film - redux.

Discussion in '35mm Cameras' started by William D. Tallman, Sep 28, 2003.

  1. A critical review of the problem was held at the local impromptu camera club
    today. It was observed that the intrusive image was exactly the same shape
    in each frame, even though it closely resembled a liquid stain. That rules
    out processing mishaps. It was also observed that each mark was in exactly
    the same place for each frame. That rules out cassette exposure, as the
    placement with regards the frame would shift.

    The only thing left is a gratuitous light exposure at the point where the
    frame is registered. An intensive examination of the camera failed to
    expose any mechanism by which that sort of thing could happen. That
    doesn't mean the camera didn't do it, but it suggests that some other
    agency was at work.

    Because the marks coincided with the frame numbers on the film (in fact the
    marks were superimposed on the non-literal numbers), it was remarked that
    the film manufacturing process might have been at fault. The problem there
    is that this sort of thing has never been experienced, apparently, and one
    would think that at least someone would have seen something of the sort,
    had that been the case.

    I'm left with the conclusion that the processing lab is not at fault, having
    no insight into how the processor could have managed the phenomenon.
    Therefore, I am disposed to re-establish trust of the processor. That
    leaves the camera. If I can discover how the camera might have
    accomplished this, I'll have a shot at a fix. Otherwise.....

    This remains a mystery wrapped in an enigma cloaked in a conundrum, all
    embedded in emulsion. Sigh....

    Bill Tallman
    William D. Tallman, Sep 28, 2003
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