Archived posting to the Leica Users Group, 2005/09/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]:-) So, if I put my 210mm, (for my 11x14) out in the sun, will those white spots finally disappear? Or should I put the lens into the freezer. Philippe Orlent wrote: > 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 >>