Digital BW, The Print

And Paul brings up another issue of film lenses vs. new "digital" lenses.

Although the effect is more pronounced on color films, B&W are thick enough
with silver to live with film lenses or digital lenses.

With color there are issues.  Color film has three layers (actually four but
one is only a UV filter), each with silver. Blue on top, green in the middle
and red on the bottom.  However thin these may be the light needs to focus
on different layers.  Film lenses are more or less --depending on quality--
tweaked for the process, among other things.

The sensor has different sensors next to each other so they need the light
on one plane.  Part of this phenomena is what causes color fringing with
certain subjects, lighting, etc.

This IS an over simplification in an effort to help those not as film savvy
as others.

Seth

==-----Original Message-----
==> From: Paul Roark
==>

==>
==> The diffraction limit of light is one obvious problem.  The 
==> semiconductor industry has fought this battle for years, 
==but they have 
==> been able to avoid the limits imposed by the wave length of visible 
==> light by going to UV light and even non-glass optics.  The camera 
==> manufacturers will not have these options.  So, I'd guess 
==this imposes 
==> a practical limit on how small a sensor of a given 
==resolution can be.
==>