120 film slack after winding on

Discussion in 'Medium Format' started by alex_hall|3, Feb 6, 2015.

  1. I've had a couple of issues with my Fuji 67 rangefinder. after finishing a roll i open the back and although the film is rolled ,it is not tight
    and looks as though it could let light in. not sure what is causing it but think it might be down to leaving the roll in too long. it gets moved
    about then becomes loose.

    I've been putting the film immediately in a container so it can be protected against light. is there a good way to deal with this? is it
    possible to unwind again in darkness and roll tight again and stick? although some light may have already got to it i wouldn't like to throw
    it.

    fuji gw670iii
     
  2. Alex - I have both GF's (Voigtlander versions but just the same as the Fujis) - and have never had this problem.
    When you refer to leaving the roll in the camera for "too long," are you also saying that the roll does seem tight enough when you remove it just after winding on after the last photo? This could happen, although this might also indicate that the winding side spring mechanism that's designed to keep the roll tight (by physically pushing against the side of the roll) is too loose, so that your "success" with promptly removed film is due to the resistance on the film due to pressure-plate and supply side resistance. So maybe take your taped roll and insert into the take-up chamber, then see how much resistance exists between the outside of the film and the spring mechanism. Just a thought!
     
  3. Hi -- I too have a Fuji GW670III, and I think John is referring to a different camera, the more recent folding 670 offered under both Fuji and Voigtlander brands. But I think that's not too important to your issue because it's not uncommon with cameras using paper-backed roll film.
    These cameras typically have a braking mechanism on the feed spool side to help achieve a tight wrap of the paper leader right from the start, and to keep some tension on the roll as it feeds while shooting. But this tension is often not sufficient to ensure a tight roll-up at the end, as you describe.
    This can be helped with a simple technique at the time of loading the film... add a little drag with your thumb on the source roll as you take up the paper leader at the start. This helps get a tight wrap on the takeup spool and has helpful consequences through to the end of the roll. Give it a try... I do this with all my roll-film cameras.
     
  4. You can tighten up a finished rollfilm as soon as you remove it from the camera, by holding it gently in the middle while turning the spool ends with your other hand. Don't overdo it, as this risks friction-induced static marks.
     
  5. The instruction manuals for old Kodak roll film cameras warn not to overtighten the roll.
    But if you tighten it just a little, after opening the back but before removing the roll, it should be fine.
    I have a roll of paper backing here, and it looks like about 10in (25cm) from the end of film to the tip of the paper.
     

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