The Hasselblad Xpan ratio

Discussion in 'Photography Forums' started by Member 79251, Jan 21, 2008.

  1. Member 79251

    Member 79251
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    A friend of mine has just pointed this out to me regarding a different way to crop your images, it might be useful.

    The link to the site: http://www.fototheque.com/xpan/index.html

    and some examples:

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  2. springtide

    springtide
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    Still confused :eek:

    So, for medium format cameras (like the Pentax 645) in normal aspect ratio, what would be the crop factor? Around 0.6 ??
     
  3. RobDickinson

    RobDickinson
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    Crop factor?

    Try this:

    [​IMG]

    The xpan just uses 2 35mm frames for its panoramic look, and IMo produces excelent results. I htink you need the film processed by people who know what there doing with it.
     
  4. springtide

    springtide
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    So basically....

    35mm has a ratio of 3:2
    Medium format has a ratio of 4:3

    Medium format has a "crop factor" (for comparing lenses) of 0.71 (36/50.7) width and 0.61 (24/39) height.

    So, when comparing a Medium format lens to a 35mm say for a wide angle, a 35mm medium format lens is like a ~23mm FF lens.

    i.e. a 35mm Medium format lens is like a 25mm/21mm lens in FF(35mm) terms.

    Is that about right?
     
  5. danburbridge

    danburbridge
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    There isnt't just one "medium format" however

    You have (on 120 film)

    "size" | aspect ratio | actual size

    6×4.5........1.35:1......56 × 41.5
    6×6...........1:1..........56 × 56
    6×7...........1.25:1......56 × 70
    6×8...........1.37:1......56 × 77
    6×9...........1.50:1......56 × 84
    6×12..........2:1..........56 × 118
    6×17..........3:1..........56 × 168
    6×24..........4:1..........56 × 224

    645, 6x6 and 6x7 are most common sizes
     

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