I am not sure about "automatic stop down" which appeared in
the late fifties, but Pentax is the originator or the
"automatic reopen aperture", the "instant return mirror",
and the "behind the lens meter". Pentax had a history of
inventing SLR inprovements and licensing them very cheaply
to other companies. Sometimes to the point where the other
companies had them on the market before Pentax.
--Tom
"Juan J. Buhler" wrote:
>
> On Fri, 15 Jun 2001, Tom Rittenhouse wrote:
>
> > Actually it is a "Practika screw mount". Pentax did not
> > invent it they adopted it from the german cameras. That
> > ain't bad, it just means there are more lenses available out
> > there than you though. M42 is the generic name for the
> > mount.
>
> Yup, you're right, although I've heard "Pentax SM" more often than
> "Practika SM."
>
> BTW, was the implementation of automatic aperture on these lenses also
> invented by someone else? Was it standard?
-
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 .
