Length of 120 and 220

Discussion in 'Medium Format Cameras and Accessories' started by David Lyga, Aug 8, 2012.

  1. David Lyga

    David Lyga Subscriber

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    Does anyone know, precisely, how long the actual FILM is in both 120 and 220? About 3 feet and 6 feet but precisely has anyone ever measured them? - David Lyga
     
  2. batwister

    batwister Member

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    Not sure how much it differs between films, but recently opened up a roll of expired Superia 100 (120) and it was almost precisely 83cm.
     
  3. Gerald C Koch

    Gerald C Koch Member

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    "almost precisely" ??? My 12th grade English teacher would have thrown a dictionary at you. :smile:
     
  4. F/1.4

    F/1.4 Member

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    If you're being generally specific, 120 is about 2 3/4 feet long.
     
  5. batwister

    batwister Member

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    Could have been worse - "She like almost literally threw a dictionary at me!" I'm only assuming your English teacher was a hysterical woman, of course.
     
  6. MattKing

    MattKing Subscriber

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  7. Bob-D659

    Bob-D659 Member

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    Rolls of 120 film from different makers are slightly different lengths as well.
     
  8. Leigh B

    Leigh B Member

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    "Precise" is an imprecise term.

    To what accuracy do you want the measurement: ±1.0", ±0.10", ±0.010", ±0.0010", ±0.00010"? At what temperature?

    What is the manufacturing tolerance? If you measure one roll, how close will that be to other rolls from other manufacturers.

    Why can't you measure your own film? If you plan to use the information requested, you
    must surely have tools sufficiently accurate to measure whatever you're working on.

    Why do you need the information in the first place?

    - Leigh
     
  9. David Lyga

    David Lyga Subscriber

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    Leigh (et al): I meant within, say, 1/2 inch or 1 cm at room temp. But thanks, I think that I have what I need to know. 83cm is ever so slightly longer than 2.75 feet, so that is accurate enough.

    BobD659's reply does, however, slightly disturb me (no 'bureau of standards' type length). - David Lyga