A lens that only fits on a Pentax with plastic lens mount

Here's another risk to watch out for in lenses that I never knew was possible before. I was thinking of buying a used MZ-M as a spare body, which had an autofocus Sigma lens that came with it. I didn't need the lens, and so I would have been putting it up for sale on eBay. I know that

Re: A lens that only fits on a Pentax with plastic lens mount

"Peter Spiro" [EMAIL PROTECTED] wrote: Here's another risk to watch out for in lenses that I never knew was possible before. I was thinking of buying a used MZ-M as a spare body, which had an autofocus Sigma lens that came with it. I didn't need the lens, and so I would have been putting