Archived posting to the Leica Users Group, 1996/09/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 08:58 AM 13/9/96 -0400, you wrote: > >Thanks to those who explained the "22" on my Summicron focusing ring. >Now, my next question. My black 50mm Summicron, which is #3,618,xxx, is >engraved with a "22," but in Eastland's _Leica M Compendium_ there is a >photo of a chrome specimen serial number 3,606,xxx which is engraved >"19." > >Why would the actual focal lengths of these two lenses be different when >they were presumably manufactured within a couple of years of each other? >Wouldn't this need to be due to a change in the design of the lens?? > >Thanks for any input on this, > >Tom Knoles >tgk@mwa.org > Follow up question. Is the focal length measured for each lens at time of manufacture and stamped on the lens barrel? Dan Cardish <dcardish@spherenet.com> <http://www.spherenet.com/dcardish/photo.htm>