Archived posting to the Leica Users Group, 1998/01/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Dave, Increase your version number by one, ie the current optical design is v 4, since the original collapsible and firest rigid chrome lenses are distinct optical designs.... On Wed, 14 Jan 1998, Dave Richards <rchdp@worldnet.att.net> wrote: >>Just bought a Summicron 50 mm today. It is a 1969-1979 model (second >>optical design). According to J. Eastlands Leica M Compendium there a two >>version of this lens, a 7 and a 6 elements design. Does any of you know >>what kind of lens mine is? Serial number is 2518961. >>This book also states the differences this specimen and the current optical >>design so minute as to be of little consequence. Is this true? Erwin what >>are your findings? > >According to Dennis Laney in the Leica Collector's Guide, your Summicron >was made in 1972. That makes it a 'second design' lense with 6 elements >with one cemented pair. the present 'third design' Summicrom-M also has >six elements with two cemented pairs > >Hope this helps. > >Dave >