Digital BW, The Print

I disagree with your application of Nyquist's theorem.  Nyquist's theorem
applies to periodic signals.  An individual line (white or black) is not
periodic, but a line-pair (one black and one white) is.  So, Nyquist's 2x
sampling theorem applies to the lp/mm number, not the lines/mm number.

----- Original Message -----
> From: "Austin Franklin" <darkroom@...>
>
> 40 lp/mm is 80 lines/mm.  But...to actually reliably resolve 80 lines/mm,
> you need to sample at 2x that, or 160 lines/mm...and that only is on axis,
> off axis you need 1.4x, or 224 lines/mm...  24mm x 224 x 36mm x 224 =
> 43,352,064 or 43M pixels...and this doesn't take into account that a
single
> shot sensor only contains %25 real color information...so to get 43M REAL
> color pixels, you'd some multiplication of that...