Archived posting to the Leica Users Group, 1996/09/13
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Tom,
checked my chrome 50mm Summicron #2,052,xxx,and that is engraved "19"
; 51.9mm I suppose.
--
Reg Ronaldson (reg.ronaldson@zetnet.co.uk)
Norwich,Norfolk,England
In message <Pine.SCO.3.91.960913085327.16268A-100000@mark.mwa.org>
Thomas Knoles <tgk@mwa.org> writes:
> 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