Except that Gary's measurements are at best only accurate to about 1 part
in 300, or about .15 millimeter, whereas the close tolerances for the Contax
are on the order of .005 millimeter. That makes it difficult to say with
any certainty that Olympus did not adjust the flange to film plane
distance at some points in the OM line.
To make any real judgement, it seems that what we need to know is what the
curvature of field of a 'normal' lens is at the film plane: how 'deep' this
curve is from corner to center at the film plane in millimeters (or microns,
etc.)
Chip Stratton
Whose head is reeling from trying to phrase that clearly...
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