Hi,
To quote one of Winsor's references, in case there is still a question:
"To maintain the same field of view, the lens focal lengths must be in
proportion to the format sizes. Assuming, for purposes of comparison, that the
4×5 format is four times the size of 35 mm format, if a 4×5 camera used a 300
mm lens, a 35 mm camera would need a 75 mm lens for the same field of view. For
the same f-number, the image made with the 35 mm camera would have four times
the DOF of the image made with the 4×5 camera."
Thus ignoring FL and only concentrating on FOV (which is reasonable for
composing the image) a smaller sensor results in a larger DOF at any given
aperture.
Mike (still packing)
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