Archived posting to the Leica Users Group, 1998/09/24

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Subject: Re: [Leica] 3-cam and leicaflex SL
From: "Dan Post" <dwpost@email.msn.com>
Date: Thu, 24 Sep 1998 11:25:27 -0400

Thib-
The first SLR was the 'Standard', I believe, and had a single axial cam to
couple the external meter. The SL and SL2 had an internal TTL meter, and the
second axial cam was added- these are the two 'ramp' like  devices near the
rear element. When the R series was started, a 'third cam' was added- it
really was not a cam, but a step like affair next to one of the axial cams.
Later lenses had all three, and the newest lenses have only the third cam-
usually you can tell if the lenses will fit your SL as they advertise 'third
cam lens'  for the latest lenses only fitting the R and "three cam lens" for
those with all three cams, and which will fit the SL and SL2. In any case, a
quick look will tell you if you can see the lens in person!
Good shooting!
Dan
dwpost@msn.com