Archived posting to the Leica Users Group, 1998/04/01

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Early Canon LTM Lenses
From: "Jim Bielecki" <>
Date: Wed, 1 Apr 1998 20:20:18 -0500

>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.

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.