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Thread: digitars focal length in 35mm

  1. #1
    Senior Member danlindberg's Avatar
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    digitars focal length in 35mm

    A quick question. Assuming a back with size 37x49.

    Do you simply calculate any given digitar FL with *0.7 to get the focal length on full format 35mm ?

    dig 24 = 16.8 in 35mm
    dig 28 = 19.6 in 35mm
    dig 35 = 24.5 in 35mm
    dig 47 = 32.9 in 35mm

    and so on......

    Is this correct?
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    Senior Member Graham Mitchell's Avatar
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    Re: digitars focal length in 35mm

    Basically, though there is no perfect conversion factor due to the different aspect ratios of the sensors.

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    Subscriber & Workshop Member GrahamWelland's Avatar
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    Re: digitars focal length in 35mm

    I use one of these tools to compare focal length equivalents. Basically the diagonal size of the sensor is used to calculate the equivalency factor:
    http://www.alpa.ch/en/products/tools...alculator.html
    http://www.captureintegration.com/20...nt-calculator/
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  4. #4
    Senior Member danlindberg's Avatar
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    Re: digitars focal length in 35mm

    Great! Thanks
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