> >I was thinking, is it possible to turn their power-zoom (the extra 2 pins)
> >power into USM power source. If so, they might just forget the power-zoom
> >feature and employ USM technolgy without phyical modification to the camera
> >mount.
>
> Wouldn't you get strange results is you put a power zoom lens on a USM
> camera or vice versa? I suppose you could add features to identify
> the various lens types, but you'd probably have to sacrifice
> compatibility at some point, and Pentax are famous for not doing that.
I previously had presumed that the power-zoom contacts were simple power
contacts to the lens; presumably the digital interface is used to engage
the zoom motor, or the collar, of course.
As such, if they just do provide a power source to the lens, I see no
reason that they could not be used for either or both simultaneously.
Of course, these contacts may not simply be power as I had thought...
- Peter
-
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 .
