Perhaps you don't need to remove the lens mount in the 1st place. Just 
remove the black plastic screwed on the lens mount might give u enough space 
to work on the lens. Much better than removing the mount. But I have not 
worked on this particular lens (though I painted it matt black).

regards,
Alan Chan

>Sorry guys... that guy was me.  :(
>
>I wasn't actually going to take it apart.... but was more curious to see
>whether it was possible and how someone would go about doing this.
>
>There is actually what appears to be a small piece of hair on the inside of
>the rear element.  I had posted several weeks back a question to see if
>anyone has ever sent their lens to pentax to have the lenses cleaned and
>roughly how much it would cost.  But no one every replied.
>
>I've e-mailed pentax and they cannot give me a rough estimate without me
>sending my lens to them.
>
>I posted the message to see (and maybe I was very naive for asking) if
>whether indeed it was an easy task to remove the bayonet mount and clean 
>the
>rear element, if indeed that's where the little hair is.  It seemed like
>people in that newsgroup have probably done stuff like that and I wanted to
>see what the exact process would be.  If I know correctly.... removing the
>bayonet to get the rear element would probably be disastrous.  I'm assuming
>there are little springs that hold the ball-bearing contacts in place and
>that would probably be a pain in the a*$ to re-assemble... and not to
>mention possibly calibrating the lens if any elements were removed.
>
>Anyways...  at least I got a response from PDMLers by posting the question
>on another newsgroup.  :)



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