[rollei_list] Re: 'Old' Zeiss glass question

Mark,
I just noticed you are the co author of the Zeiss Compendium. 
It is a great reference work, belated congratulations. 
Thanks for your message,
God bless You.
Marvin.

-----Original Message-----
From: "Jeffery Smith" <jls@xxxxxxxxxx>
Date: Thu, 27 Apr 2006 20:02:21 
To:<rollei_list@xxxxxxxxxxxxx>
Subject: [rollei_list] Re: 'Old' Zeiss glass question

Along this vein, Cosina Voigtlander recently released a nice 40/1.4 in a
single coated version for people wanting the retro B&W look. If you have a
multicoated lens that you wish were uncoated, I'm sure that Focal Point
would be happy to buff that coating right off. ;-)

Jeffery Smith
New Orleans, LA
http://www.400tx.com




-----Original Message-----
From: rollei_list-bounce@xxxxxxxxxxxxx
[mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of Marc James Small
Sent: Thursday, April 27, 2006 5:57 PM
To: rollei_list@xxxxxxxxxxxxx
Subject: [rollei_list] Re: 'Old' Zeiss glass question


At 08:41 AM 4/27/06 -0500, Peter J Nebergall wrote:
>This begs a question:  If Zeiss was producing coated lenses since 1937, 
>were they simultaneously continuing uncoated lenses in the same 
>formulae?  I have 2 Contax Sonnar f1.5s  and 2 more f2s...  1 of each 
>is coated. When did they stop making uncoated lenses?

What a great query.  Zeiss at first only made coated lenses on demand as the
early process was rather expensive.  As a result, coated phtographic lenses
were sold in hard-money areas such as the US, prior to 1939, and in Sweden
thereafter.  Both of the Zeiss entities, Carl Zeiss Jena and
Zeiss-Opton/Carl Zeiss, had converted over to coated lenses by the early
1950's, when they ceased the use of the distinctive markings. Carl Zeiss
stopped this marking first, followed shortly thereafer by CZJ and Schneider
and the Soviets and even Mighty Kodak.

No optical company has ever ceased making uncoated lenses, as these have a
value in technical applications.  One certain microscope might call for a
coated lens, while another similar lens for another application might
require an uncoated lens.

Yu can still buy an uncoated lens from Carl Zeiss or JSK or Nikon or Leitz
or Canon or the like.  They sell a lot of them.

Marc


msmall@xxxxxxxxxxxx 
Cha robh bàs fir gun ghràs fir!


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