At 10:16 AM 2/1/01 -0800, BW wrote:
>There may not be an exact definition of a Tessar lens. One optics text
>does call many of these "Tessar form" lenses, but the classic Tessar lens
>is a 4-element lens, with a max aperture of f/2.8 or f/3.5. An example
>of a lens that is not a classic Tessar type is the Pentax 40mm f/2.8
>lens. The Pentax lens is a 5-element, 4-group design while the Nikkor
>and Zeiss Tessar (Contax mount) 45mm f/2.8 lenses are 4-element, 3-group
>designs. Once you get beyond f/2.8 or wider than 40mm (for 35mm
>cameras), lens designs tend to be very different from classic Tessar
>lenses.
Is the A135/2.8 a Tessar design?
>The real interesting thing on the web site was not the lens, but a link
>to the new Nikon FM3A camera. A completely manual camera with batteries
>required only for auto exposure ( like the LX). I think Nikon will sell
>a lot of these.
Sounds interesting ....
... no ... resist the Dark Side ...
...there, we're ok now.
Thanks folks.
***************
"The accumulation of all powers legislative,
executive and judiciary in the same hands . . .
may justly be pronounced the very definition of tyranny."
--James Madison, Federalist 47
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org.
