Archived posting to the Leica Users Group, 2001/11/28

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Subject: Re: [Leica] Re: DR-SUMMICRON - with strange aperture scale
From: Walter S Delesandri <>
Date: Wed, 28 Nov 2001 15:20:18 -0600 (Central Standard Time)

All of these responses are of course POSSIBLE, and I can't dispute any of them, 
but there is a MUCH more likely story.

The aperture ring (the one you turn) couples to another ring.  This 
ring couples to the inner aperture ring by two screws.  The lens 
was disassembled (intentionally or accidently) and re-assembled by 
someone who didn't know they had the inner coupling ring upside 
down.  Also, if the diaphragm blades are not assembled properly, 
the lens MAY not go from wide open to f16...I assume it does, 

ANY decent camera repairman (i.e., not a Leica shop) should be able to 
handle this problem, especially on that particular lens.
If this is NOT the problem, then please investigate the rest of the 

On Wed, 28 Nov 2001 15:27:11 EST wrote:
> In a message dated 11/28/01 11:10:08 AM Eastern Standard Time, 
> writes:
> > I have this DR-Summicron which has its aperture scale and index directly
> >  > opposite to the distance scale. When mounted on the camera, the distance
> >  > index is facing up and the aperture index and scale is facing down.
> >  > 
> >  > Is there a way to rectify this?
> >  > 
> >  > Dan K,
> Dan:
> All of the DR and Rigid Summicrons were matched to individual focussing 
> mounts when delivered new from the factory. The likelihood is that your 
> Summicron lens head -

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