Without trying to question or second guess the Schneider guy, I suspect that the reason for the recommendation without reservations was because he was referring to Schneider lenses and they unlike some of the cheaper prosumer lenses may not put their multicoatings on the outside surface of the lens or lens elements where they can get scratched or effected by strong chemical solutions. Some of the coatings may very well be sandwiched between layers of glass in the lens or lens element so as to be protected from direct contact with anything including cleaning solutions. Cheaper lenses and other optics may put the coatings on the front of the optics, the lens or lens element as if the coating was merely painted on, although I suspect that they are actually baked on to the surface in some manner, which may leave then susceptible to damage from liquids and scratching. Since many scanners use internal front surface mirrors, their reflective surfaces are open to easy damage from scratching and chemical solutions as might be the various coated optics that are used to focus the light on the sensor, since typically the assumption is that the optics are internal to the scanner and not user accessible thus in no need of more elaborate treatment as might be the case for camera lenses whose front elements and often rear elements are accessible to users.
----Original Message---- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, August 08, 2005 8:39 AM To: [EMAIL PROTECTED] Subject: [filmscanners] Re: HP PhotsSmart - questions > I was surprised, but the Schneider guy recommended the dilute > Windex solution without any reservations. > > Mr. Bill > > > > Laurie Solomon wrote: >> I would speculate that the impact that various dilutions of ammonia >> and water or Windex with ammonia might have on optical surfaces... > > -------------------------------------------------------------- > -------------------------- > Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe > filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) > in the message title or body ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
