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  1. #1

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    SL66 and 220 Film

    I've been shooting with my new SL66 and loving it. Frame spacing on 120 film has been fine, but today I ran 6 rolls of 220 film through it and the spacing gets progressively wider. I still get 24 shots per roll and it's only a minor annoyance when I try and sleeve the negs but I wonder if the back is ok. There is no pressure plate on the camera, only a little switch that changes the film counter.

  2. #2

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    That seems to be correct. The spacing on my roll of 220 definitely is wider than 120. Probably has to do with lack of paper backing as film is wound on to the takeup spool.

    The pressure plate is part of the film insert in the film back.

  3. #3

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    Hi,

    Thanks for the reply. Does the spacing on your 220 rolls get progessively wider? On mine, the spacing is pretty normal at the front of the roll, but then gets wider.

    William

    Quote Originally Posted by elekm
    That seems to be correct. The spacing on my roll of 220 definitely is wider than 120. Probably has to do with lack of paper backing as film is wound on to the takeup spool.

    The pressure plate is part of the film insert in the film back.

  4. #4
    Mike Kovacs's Avatar
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    I haven't shot 220 in mine yet, however it sounds like the type of problem you can sometimes encounter when there isn't enough tension on the film.

    Have you tried another roll? When I first wind the paper leader on the take-up side, I always hold my thumb against the full roll when first loading the leader to provide some tension.
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  5. #5

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    I think this is how the Pentax 67II manages to get 21 frames on 220 and still has a decent space between negs.

    David.

  6. #6
    aoresteen's Avatar
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    FWIW only the fisrt version of the Pentax 6x7 got 21 pictures on 220. Later models were reduced to 20 images on 220 as I recall.
    Tony
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  7. #7
    Helen B's Avatar
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    Oddly enough, later versions of the SL 66 mag (when they became either 120 or 220 only) get 25 frames on 220.

    Best,
    Helen

  8. #8

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    Helen,

    Did you experience the odd spacing when using 220 with the original 120/220 SL66 backs?

    William

    William
    Quote Originally Posted by Helen B
    Oddly enough, later versions of the SL 66 mag (when they became either 120 or 220 only) get 25 frames on 220.

    Best,
    Helen

  9. #9

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    The negs on my 220 are pretty evenly spaced from start to finish, although the gap widens slightly. But not a whole lot.

    I would tend to agree with Mike that you not allow the feed spool to loosen when loading. But it's probably a combination of perhaps the film being looser than it should be and no paper backing.

    As long as they don't overlap, I wouldn't be too concerned unless the gaps become huge -- like half a frame.

  10. #10
    Pragmatist's Avatar
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    Simple enough

    The roll gets larger in diameter as the film is advanced. The amount that the winding mechanism moves the roller core does not change as the roller fills with film. Larger diameter means increasing takeup as the film is advanced. Result: wider spaces between frames. In most backs and cameras, there is no remedy for it, it is an artifact of design.
    Patrick

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