Digital BW, The Print

Truman writes:

> However, given a complex scene illuminated by
> white light, I would expect you could come close.

Sometimes.  But there are important real-world cases that just don't work.
You cannot simulate the results of shooting B&W through a filter by using
any transformation of RGB, for example.  You cannot simulate Velvia from
Provia, either; just increasing saturation doesn't work.  Many other
real-world examples could be cited.

This is why some people become very frustrated trying to exactly duplicate
the "look" of a B&W film (or any film) using the image from an electronic
camera.  It can't be done.  In fact, you can't duplicate the look of an
electronic camera on film, either, but since hardly anyone tries to do that,
nobody has noticed.