Looking for film scanner

Discussion in 'Scanners' started by ZalekBloom, Apr 26, 2007.

  1. ZalekBloom


    Well that makes sense, I don't scan much anymore but I have been thinking
    off and on about getting into medium or large format and I would want to
    scan those negs.

    So, if the resolution spec is not reliable, how do you determine which
    scanner will, in the end, give me the largest print?
    DBLEXPOSURE, May 7, 2007
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  2. ZalekBloom

    CSM1 Guest

    The one with the highest optical resolution for the film format you are

    Print size is determined by the size of the film and the resolution of the
    scan and the resolution you print at.

    35 mm film = 24 mm x 36 mm frame size.
    Assuming using the maximum image you can get out of the film and the print.
    (Not trying to use a standard print size).

    Scan at 3200 dpi (the max for some scanners) dpi and ppi are
    (25.4 mm per inch)
    Convert mm to inches.
    24 mm / 25.4 = 0.945 inches short side
    36 mm / 25.4 = 1.417 inches long side
    0.945 inches * 3200 dpi = 3024 pixels
    1.417 inches * 3200 dpi = 4534 pixels

    Scan 35 mm film full frame gives you a 3024 X 4534 Pixel image when scanned
    at 3200 dpi.

    Say you print that image at 300 DPI (best print)
    3024 pixels / 300 dpi = 10.08 inches
    4534 pixels / 300 dpi = 15.11 inches

    You end up with a 10 x 15 inch print from full frame 35 mm film. If the
    scanner is a 3200 dpi scanner.

    Fitting the scanned image to standard print sizes is another subject. You
    have to crop somewhere!
    CSM1, May 7, 2007
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  3. You can't pick the right one by simple inspection of specification numbers.

    If you *really* need the "largest" print, then look into getting a
    commercial drum scan done at their top res.

    Unfortunately, price is a fairly reliable guide; small price differences
    don't mean much, but consumer flatbeds are bottom of the heap,
    professional graphics flatbeds (like the Epson V750) rather better,
    dedicated film scanners like the Nikon Coolscan 9000ED (for medium
    format) are much better, and the commercial-grade scanners like the
    Flextight and the real drum scanners are better still.

    The difference between a flatbed and a film scanner is much bigger than
    the difference between any two film scanners.
    David Dyer-Bennet, May 8, 2007
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