Archived posting to the Leica Users Group, 2005/09/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The typical white spots in some Schneider lenses (commonly known as Schneideritis) are pretty harmless to the glass and absolutely not the same as acid markings from fungus. Just send it for a CLA and the lens will return fine. The exact origin of the spots remained a big question until recently. It seems that one of the workers of the assembly line of certain Schneider lenses just had a severe case of dandruft. This combined with an oily substance he put in his hair called brillantine made the hair particles invisible in the lens during quality control before leaving the factory (due to refraction of light). It is only after a number of years and after a chemical reaction following on temperatures above 45,7? centigrade, that these white spots become visible. Visible but harmless. At least that's what I've heard. > From: David Lee <leirex@sbcglobal.net> > Reply-To: Leica Users Group <lug@leica-users.org> > Date: Thu, 1 Sep 2005 13:07:16 -0700 (PDT) > To: Leica Users Group <lug@leica-users.org> > Subject: [Leica] Schneideritis > > Hello, > > Can anyone educate me on Schneideritis? What is it and what effect does > it > have on optical performance? > > Thanks, > David > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >