<<<. . . the lens you have is actually a PK/R mount, meaning that it was made by Rioch for Rioch cameras. At some point in time (just before the A series lenses I believe) Rioch purchased the rights from Pentax to make their cameras with the K-mount . . . Rioch then developed their OWN system for automatic aperture control independent of Pentax's automatic aperture control.
The result? NEVER use a PK/R lens on an autofocus body. many people will tell you horror stories of having the lens get stuck, and having to have it removed professionally. I think all this is pretty close to accurate, Bill<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<,, Bill, Many thanks. At the end you say never to use a PK/R lens on an Pentax Autofocus... so it is ok on a manual focus? Leonard - 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 .
