I don't understand "Quantum Electrodynamics"..... Don't Answer...! -----Original Message----- From: owner-photoforum@listserver.isc.rit.edu [mailto:owner-photoforum@listserver.isc.rit.edu]On Behalf Of Dan C Sent: 26 October 2002 22:55 To: List for Photo/Imaging Educators - Professionals - Students Subject: RE: filters and a long standing question