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

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

Subject: Re: [Leica] Vignetting of Summicron M 2/28mm ASPH
From: "Phong" <phong@doan-ltd.com>
Date: Sat, 17 May 2003 09:41:58 -0400
References: <03E63C98-8802-11D7-A816-0050E42E6E0B@shaw.ca> <001101c31c26$03b78680$0100a8c0@liyue> <00ad01c31c38$3968ed70$70a72350@home> <003101c31c6e$37cd7d60$6401a8c0@oemcomputer>

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




- ----- Original Message -----
From: "Don Dory" <dorysrus@mindspring.com>


> Rafael,
> I wouldn't condemn all 28 Summicrons based on the sample  provided.  I
> suspect this one is flawed and needs to be returned.  For example, last
week
> one of the group complained that his/her 24 ASPH flared like crazy: yet I
> can not make mine flare, even when shooting diagonally into the sun.
>
> My personal belief is that the Leitz designs are very build sensitive.  So
> if an element is a little out of place then really bad things happen.
That
> might be why all aspheric lenses go back to Solms for repair.
>
> I can say that many on this list treasure the performance of their 28.
>
> Don
> dorysrus@mindspirng.com


- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

Replies: Reply from "Don Dory" <dorysrus@mindspring.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
Reply from Mark Rabiner <mark@rabinergroup.com> (Re: [Leica] Vignetting of Summicron M 2/28mm ASPH)
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)