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Re: [OM] Zuiko 28mm/f2.0: Shades & Coatings

Subject: Re: [OM] Zuiko 28mm/f2.0: Shades & Coatings
From: "Giles" <cnocbui@xxxxxxxxx>
Date: Wed, 14 Jun 2000 10:55:45 +0000
I have one of these sheets for a 28/2 with floating elements.  I could 
scan it and send it to you or Hans if you would like.

Giles

John A. Lind wrote:

> His two notes mention the possiblity of 3 versions of the lens, the
> earliest of which may not have had the floating element.  It has always had
> earlier designs, some dating to the beginning of the 20th Century.  I'm
> wondering if the 28/2 is a symmetric design, and the 24/2 and 35/2 are
> asymmetric designs (or vice versa).  Just stabbing in the dark about
> another possible correlation.
> 
> Olympus provides (or at least provided) a data sheet containing DOF tables
> and a cutaway view of the lens (without dimensions) in the box with each
> lens.  I think most of these get chucked into the trash along with most of
> the other papers.  It would be interesting to compare cutaway views showing
> the element and group configurations on the three lenses.  It is sad this
> information was not provided in the OM Sales Information Files (or was it?).
> 

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