Sounds like it has a C-mount adapter on it - for movie cameras and some other things. It should come off with either a normal thread action or bayonet if it is the K-mount. Since the adapter is probably not really that thick, you may have trouble with it if you try to grip it tightly since it could have a tendency to go out of round, causing it to bind. You might want to try unthreading it like you would a stuck filter, but applying a flat hand to the thread end and pressing the lens and adapter into your hand as you try to turn the lens off. Paul M. Provencher (ppro) -----Original Message----- From: Mark Cassino [mailto:[EMAIL PROTECTED]] Sent: Saturday, May 05, 2001 11:53 AM To: [EMAIL PROTECTED] Subject: OT: What Mount Is This? I recently picked up a Rikenon 100mm f2.8 on eBay, thinking it was a K-Mount. It's actually a mount I've never seen before - the lens is quite flat, has no aperture diaphragm, and has a "snout" that must stick into the camera body. There are threads on the base of the snout, they seem to be around 30mm in diameter. What type of body would this lens fit? - MCC - - - - - - - - - - Mark Cassino Kalamazoo, MI [EMAIL PROTECTED] - - - - - - - - - - Photos: http://www.markcassino.com - - - - - - - - - - - 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 .
