Your Rikenon lens has the Ricoh P mount, which is not compatible with the K-A mount. While it will fit, as it is a standard K-mount, the electrical contacts are placed where Ricoh wants them to function with Ricoh bodies, not where Pentax places them. The Ricoh-P and Pentax K-A are not compatible, electrically speaking....
Another note, on Pentax AF bodies, the Ricoh contacts will jam the AF mechanism and lock the lens on the camera, making it quite difficult to remove, so use caution f you ever get a Pentax AF bodies with Ricoh-P lenses. John ----- Original Message ----- From: "Leonard & Peggy Brown" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, January 15, 2002 9:27 PM Subject: Rikenon 50mm matchup? > 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 .
