Archived posting to the Leica Users Group, 1998/01/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Bud, Just look at them. In direct comparison size/ heigth is different, curvature of the front lens is different, and the reflection/ fracture of the inner lens elements is different. Additionally, the redition is so different, that you see it immediately. Why do you believe, that both lenses might have an identical optical formula? Alf - ---------------------------------------------------------------------- At 17:28 28.01.1998 -0600, Bud Cook wrote: >The Morgan & Morgan Leica Manual, Thirteenth Edition, Second Printing dated >November 1956 discusses the new 7 element Summicron which comes in a >collapsible screw mount as well as a new version for the M3 which comes in a >dual range focusing mount in which the lens element can be unscrewed. The >manual shows one diagram for this lens and it appears to be the same as the >one for the Rigid Summicron shown in later literature. > >I've always believed that the optical formula was identical between my >collapsible and Rigid Summicrons.