Archived posting to the Leica Users Group, 2001/12/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]"This lens is nothing more than a simplified version of a Summicron which retains the same focusing system." Identifying Leica Lenses, Ghester Sartorius. This Elcan 2/50 has 4 elements in 4 groups and is the Ernostar type, not a Tessar (4 elements in 3 groups). It was close in size to the 'Cron but lighter in weight, being 220g, 40g less than the latter. (because of fewer glass?) However, the Elcan had a longer minimum focusing distance of 3.5 feet/107 cm. Andrew >In a message dated 12/24/01 6:53:24 AM Eastern Standard Time, >bachchaconne@my-deja.com writes: > >> The Elcan 2/50 was a simplified version of the 'Cron. > >No. the Elcan 2/50 is a four-element lens and would almost certainly be an >updated Elmar/Tessar type triplet with the rear two elements cemented; the >contemporary 50/2 Summicron was a Gauss design, either the DR/Rigid 7-element >or 11817, the first 6-element lens. See both Lager, Rogliatti and Leitz >sources. Compactness appears to be the reason the U.S. Government >commissioned the Elcan. > >Seth LaK 9 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html