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  1. #1

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    Film advance problem w/ Velvia

    I am having a peculiar problem with my Mamiya RB67 120 back. With a roll of Fuji Velvia loaded, i can wind to frame 1 and trip the shutter, but when I advance the frame the indicator stays on one no matter how many times try to wind on. It has happened with all four rolls I tried (two 50's and two 100's). Strangely enough, I have loaded and shot several rolls of Ilford film with absolutely no problems. So it seems my back has a problem with Velvia. I searched for info on this, and the closest I came to an answer is something about "film thickness syndrome." Can that be the case here? Is this something that can be fixed with some sort of cleaning?

    ~Kevin

  2. #2
    kodachrome64's Avatar
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    Wirelessly posted (BlackBerry 8300: BlackBerry9000/4.6.0.185 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)

    Wow that's weird. I have used both Velvias in my RB67 and they acted no different from any other films.

    Is there any difference in thickness with Velvia and other films? Have you tried other tranny films?
    Kodachrome
    They give us those nice bright colors
    They give us the greens of summers
    Makes you think all the world's a sunny day, oh yeah.
    -Paul Simon

  3. #3

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    I have used Velvia 50 and Velvia 100 in 120 and 220 with Mamiya RB67 Pro-S and Pro-SD backs with no problems at all.

  4. #4
    Poisson Du Jour's Avatar
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    The problem sounds like the film perforations are skipping over the sprockets, or could be broken pawls connecting wind-on lever and sprocket gear; this can happen in any camera but especially those under heavy use (35mm, 120 esp.). Try a different Velvia (100, 100F) or Provia (100, 100F, 400) and see if it repeats; if it does, it's a Fuji problem but I'd hedge my bets on a fault with the film transport first.
    .::Gary Rowan Higgins

    A comfort zone is a wonderful place. But nothing ever grows there.
    —Anon.






  5. #5

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    Fish of the day,

    120 film does not have perforations. 120 backs do not have sprockets.

  6. #6
    Philippe-Georges's Avatar
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    I had this kind of problem once, although with a Linhof Rapid Rolex 6x7 back. The film transport problem was caused by the tape used to stick the film on the backing paper. The tape came lose a little and got stuck on one of the rollers. Perhaps the tape could be the reason of your problem, who knows?

    Philippe
    "...If you can not stand the rustle of the leafs, then do not go in to the woods..."
    (freely translated quote by Guido Gezelle)

    PS: English is only my third language, please do forgive me my sloppy grammar...

  7. #7

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    Q.G., I hate it when my 4x5 film jams because of its sprocket holes. ; )

  8. #8
    tjaded's Avatar
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    Fuji 120 backing paper is thinner than other brands...maybe that has something to do with it?
    --------------------
    "Everytime I find a film or paper that I like, they discontinue it." -Paul Strand

    www.glasskeyphoto.com

  9. #9
    Mark Antony's Avatar
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    Could be thinner backing, or even thinner emulsion as slower films sometimes are thinner than fast ones.
    Can you get a slow B&W film through OK? They should be thinnest.
    Personally I'd bet on the back being out of tolerance, try to get another back. I have a hard time believing Velvia can't be used in RB67 backs.
    Mark

  10. #10

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    Mark Anthony,
    I'm sure it's the back, but I was hoping to see if anyone had any of the same issues. I've ran Ilford Pan F+ (slow) with no problems. I'm going to try my last roll of Velvia today and see what happens.

    ~Kevin

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