Archived posting to the Leica Users Group, 2001/05/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Marc James Small wrote: > At 11:12 PM 5/11/2001 -0700, Dennis Painter wrote: > >Do you know when Leitz began selling lenses using vacuum coating? > > > > The Zeiss patent expired in 1958, I believe, so that year probably marked > the beginning of Leitz' using hard-coating methods. The process is not > technically difficult. A number of small shops sprang up after the end of > the Second World War in the US and UK which offered to hard-coat lenses, as > the Zeiss patents were government property in those nations. And, by 1960, > Leitz would recoat a lens with the vacuum-coating technique, a service > offered into the 1980's. > Thanks Marc, good info to know. Puts my Summarit at the end of the line of drip coated. (1957) Coating is pristine, I'll have to go easy on the cleaning! Dennis