I've done this. The adaptor I got had a small tab that sticks out that
holds the adaptor in the Kmount. I just removed the little tab, it was
held it by a small screw. The adaptor still fit pretty really tight, so
the lens would tend to unscrew from the adaptor rather than having the
lens+adaptor come out when I twisted the lens, so I took a dremel and filed
down the K-mount side, then screwed the adaptor onto the lens real tight,
and now the lens is basically a manual K-mount.
Todd
At 07:24 PM 4/12/01 -0400, you wrote:
>Now that I have acquired ttwo Vivitar Series 1 telephotos--the 135/2.3 and
>the 200/3.0--I find myself annoyed by the M42 screwmount-to-K mount
>adapters. When I set about to remove the lens, the adapter stays in the
>Super Program body; the lens unscrews from the adapter. It's VERY annoying
>to have to extract the adapter, with whatever tools I have available, so
>that I can fit the body with another lens. (That is the idea of
>interchangeable lenses, isn't it?) Last night I used a screwdriver, but I
>realize this is a no-no.
>
>I had hoped that by using genuine Pentax-brand adapters I wouldn't face
>this problem, a problem that I first experienced last year when using a
>Samigon-brand adapter to fit an 85/1.8 screwmount lens to my Super Program.
>The Samigon actually came with a little tool to extract the adapter.
>
>If I'm going to have this problem each time he removes the lens, I might as
>well dedicate a body to it. If I decided to do that, I could have bought
>these lenses in their multicoated versions in Minolta mount, or Canon, or
>Olympus. The screwmount units--certainly the 200/3--appear to be
>single-coated.
>
>I'm tempted to use Loc-Tite to more or less permanently keep each adapter
>on the lens.
>
>Comments? Suggestions?
>
>
>Paul Franklin Stregevsky
>
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