Digital BW, The Print

> All I asked for was a real-world empirical example, not a
> gedankenexperiment.  Why can't you name a specific wavelength that
> is picked up with a certain density on some black and white film,
> but "falls in between" two colors on some color film in such a way
> that if converted to b+w it would look different?

Peter,

There isn't one, if you are talking Provia 400 vs Tri-X, as I've shown the
entire spectral response of Tri-X fits within the spectral response of
Provia 400.  So, any frequency that Tri-X responds to, Provia will as well.

Austin