Ok, I can accept this...
I also asked a mathematics major friend of mine. He says that the
problem I'm having with my "math" is that digital is a cross sectional
arrangement, and film chemicals are "random" lattice structures. And so
while some films might be diagonally sharper, it might not be on a
vertical-horizontal cross plane. I can accept this as well.
Albert
I believe your math is off by a factor of two. It takes TWO or more pixels to
resolve a line (Nyquist limit).
sq-rt (11,100,000 / 864) = 113 lines / mm
Ignoring for now the assumption that the sensor is square, if you allow for two
pixels per line, you get a more reasonable 56.5 lpmm.
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