Leonard, You're right, your lens won't work on the MZM in automatic aperture mode . . .
. . . 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 Leonard & Peggy Brown wrote: > > I just switched to an MZ-M from my trusty K-1000 a few months ago and have > been VERY slow in reading the manual. Tonight I just got to the "automatic > aperture" adjustment on the lens. While my Ricoh Rikenon 50mm lens has no > "A" > setting on the aperture ring it does have a "P" which I assume is for > "Program". I set it to "P" but nothing happened, it is still acting like > I should be setting the aperture by hand. The camera is not responding to > this setting. > > I run a small repair shop and have to think lots of these things out.... I > figured there must be some electrical contact with the lens so the camera > would know when it is in "Automatic". Sure enough I found the little copper > contact button on the bottom of the lens. > > BUT... the little contact does in no way match up with the camera's contact > points... what gives? > > Did pentax move their contact points? While this is a K mount lens was it > made to work on some other camera? > > Please, talk slow! > > Leonard//Laredo > - > 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 . - 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 .
