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[OM] Re: RE : Re: RE : Re: RE : Re: Battery question

Subject: [OM] Re: RE : Re: RE : Re: RE : Re: Battery question
From: Chris Crawford <chris@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 14 Apr 2007 17:56:19 -0600
The zuiko 40 is not a Tessar. A tessar is a four element in 3 group design,
while the Zuiko 40mm f2 is a six element in six group design. Seen here:

http://olympus.dementia.org/eSIF/om-sif/lensgroup/40mmf2.htm

It's actually a pretty unique design, the cross section doesn't look like
any of the standard designs used for 50mm lenses.


-- 
Chris Crawford
Photography & Graphic Design
Santa Fe, New Mexico

http://www.chriscrawfordphoto.com

http://www.plumpatrin.com  Something the world NEEDS.



On 4/14/07 5:26 PM, "Wayne Harridge" <wayneharridge@xxxxxxxxxxxxxxx> wrote:

> 
>> 
>> For the Olympus 85, I'm not so sure...
>> 
>> By the way the zuiko 40/2 and the zuiko ltm 40/2,8 are of
>> tessar design.
>> 
> 
> Thanks for that info Stephan.  I had heard that the tessar design (and its
> many copies) were only good for about 2.8 and not suitable for anything
> faster - this probably explains why the zuiko 40/2 was never considered a
> great performer.
> 
> ...Wayne
> 
> 
> 
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