Archived posting to the Leica Users Group, 2003/05/17

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Subject: Re: [Leica] Vignetting of Summicron M 2/28mm ASPH
From: Mark Rabiner <mark@rabinergroup.com>
Date: Sat, 17 May 2003 14:30:10 -0700
References: <03E63C98-8802-11D7-A816-0050E42E6E0B@shaw.ca> <001101c31c26$03b78680$0100a8c0@liyue> <00ad01c31c38$3968ed70$70a72350@home> <003101c31c6e$37cd7d60$6401a8c0@oemcomputer> <006101c31c7a$166f8120$6400a8c0@mtwk.sps.mot.com>

Phong wrote:
> 
> Hi Don,
> 
> > My personal belief is that the Leitz designs are very build sensitive.
> 
> Not to be contentional, what do you base this on ? Are we talking
> mechanical build design, or optical design ?   I usually hear about
> new Leica equipment of of whack but then work fine a long time
> after adjustment.  Seems more a QC problem than a design problem
> to me.
> 
> Thanks for any clarifications,
> 
> - Phong
> 
Stop your both right!

I vote its in that grey area between quality control and mechanical
build design.
I really do.

They could design an easier lens to build and align but apparently they don't.

Its a person running a very high quality alignment machine.

Barbra Streisand comes on the speakers singing "Evergreen" and
everything goes out of whack; the person's eys's fog over. There goes
one lens!



Mark Rabiner
Portland, Oregon USA
http://www.rabinergroup.com
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Replies: Reply from "Rafael Alday" <rafaelalday@yahoo.es> ([Leica] Summicron 50 lens choice)
In reply to: Message from John Collier <jbcollier@shaw.ca> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Y. Li" <liyue@netvigator.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Rafael Alday" <rafaelalday@yahoo.es> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Don Dory" <dorysrus@mindspring.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Message from "Phong" <phong@doan-ltd.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)