>From: Skip Williams <om@xxxxxxxxxxxxxxxx>
>
>Unfortunately, the shorter the focal length, the greater the depth of field.
That's actually a widely accepted myth.
DOF depends entirely upon reproduction ratio and focal ratio. Adjust any lens
of any focal length so that a dime is dime-sized on the film or sensor, and the
DOF will be the same if the aperture is the same.
For different formats, the sensor or film is a different size, but one still
tends to fill the media with the subject. This is why digital "has more DOF"
than 35mm, which "has more DOF" than LF, for a given aperture. They don't
REALLY "have more DOF," it's just that the format forces you to use a different
reproduction ratio.
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