Archived posting to the Leica Users Group, 1996/09/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The exact focal length may differ in lenses of the same DAY of production, not only for Leica lenses, but for every manufacturer. Jordan. ---------- > From: Thomas Knoles <tgk@mwa.org> > To: leica-users@mejac.palo-alto.ca.us > Subject: Re: numbers on Summicron focusing ring, again > Date: Παρασκευή, 13 Σεπτεμβρίου 1996 3:58 μμ > > > 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