Archived posting to the Leica Users Group, 1998/01/28

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Subject: Re: [Leica] Summicron 50 mm question
From: "Lucien_vD@compuserve.com" <Lucien_vD@compuserve.com>
Date: Wed, 28 Jan 1998 06:31:18 -0500

>Dave,
>Increase your version number by one, ie the current optical design is
>v 4, since the original collapsible and firest rigid chrome lenses are
>distinct
>optical designs....

Erwin wrote:

>This statement has been made several times and has never been proved. Th=
e
>original Leica brochure from 1954, describing the introduction of the
>Summicron, including its optical properties, show the identical design f=
or
>both versions. My own findings support the conclusion that the
collapsible,
>the rigid and the DR are optically identical. Unless somebody gives real=
ly
>factual and conclusive evidence to the contrary, I would prefer to state=

>that there were inly three designs and the current one is number 3 and n=
ot
>number 4.

Erwin,

I will try, this evening, to find the article in Shutterbug asserting tha=
t
fact.
(the original collapsible and first rigid chrome lenses are distinct
optical designs)
BTW the front lens of the collapsible 50 is also much more prone to scrat=
ch

than the following 50's.

Lucien
BELGIUM