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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