Archived posting to the Leica Users Group, 2001/01/11

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Subject: Re: [Leica] Re: 50 Summicron-R
From: Doug Herr <merlin@flyingemu.com>
Date: 11 Jan 2001 15:45:51 -0800

On Thu, 11 January 2001, Jim Brick wrote:

> 
> From the rear of the lens, two fixed (they don't move) metal ramp (sloped)
> cams, one on each side of the rear element (very prominent, can't miss
> them), the third cam is a square metal block (between the two ramp cams)
> that when you move it, it opens up the diaphragm.
> 
> Two ramps and a movable square block.
> 
> Jim

Jim, I think what you're describing as the 3rd cam is what Randy calls the aperture control lever.  As I understand it, Randy wants to know how to determine if the 3rd metering cam is present.

Doug Herr
Birdman of Sacramento
http://ourworld.compuserve.com/homepages/telyt
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