Archived posting to the Leica Users Group, 2001/12/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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