Archived posting to the Leica Users Group, 1998/04/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]SO indded the 50/1.5 appears to be an infringement on Zeiss, even if not an exact copy. - ---Jim Bielecki <jbieleck@northland.lib.mi.us> wrote: > > > >I've looked at cross sections of Canon RF 50mm lenses. > >Only the 50/1.5 (a lens with a bad reputation) looks like a Sonnar. > >Their good lenses (50/1.4, 50/1.8) look like typical Gauss designs. Of course the 50/3.5 is probably legit since the patents on the Tessar had epired in 1927, when, surely by coincidence, Leitz introduced the Elmar, insistnig that it was independently developed.... > > > >Marco > > > Peter Dechert states in his book that Canon didn't have the ability to > produce lenses until 1944 which is when they acquired Daiwa Optical. The > first "true" Canon normal lens was a tessar-based 50mm F3.5 introduced in > 1946. Canon's first Gauss-based design was a 50mm F2.0 introduced in 1947. > The 50mm F1.5 was based on the Zeiss Sonnar and is actually pretty good. I > know, I have one. > > _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com