I've twice had to remove the entire lensmount from the camera when one of these has become stuck. The third party ones don't seem to be machined to the same tolerances as the Pentax ones. The Pentax one is easy to attach - a snug fit not a tight one. If you have been given one of the third party adapters then give it a try and see how hard it is to attach as it may be fine (sample variation). If you're planning to buy one just go get the OEM Pentax adapter.
Paul -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Sorenson Sent: Sunday, May 27, 2007 2:59 AM To: Pentax-Discuss Mail List Subject: Third party screw mount to k-mount adapters I've heard some of the third party adapters cause a problem removing them from the camera. What's been the experience of M42 users on the list? What appears to be the cause of the problem on these? -p -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net