Digital BW, The Print

Anthony,

> But it is very important to understand that Tri-X cannot be
> _duplicated_ by any manipulation of RGB.

You are misunderstanding something, obviously.  Light is nothing but a
frequency and intensity.  Color is nothing but a response to a particular
frequency.  Show me anything on the spectral response curve of Tri-X that
can not be represented in RGB.  You can't.

An RGB sensor is completely capable of a spectral response that encompasses
the entire spectral response range of Tri-X.  The most recent CCD sensor I
designed with has a spectral response curve of 380-530nm for blue, 420-600nm
for green and 580-850+nm for red.  That gives an overall spectral response
of 380-850+ nm.  Tri-X has a spectral response of 400nm to just past 650nm.
Smaller than the CCD.

Austin