New answers tagged lens-adapter
Fotodiox offers an adapter (http://www.fotodioxpro.com/selective-35mm-olympus-zuiko-lens-to-pentax-k-camera-lens-mount-adapter.html). I have not tried this particular adapter myself, but I use another adapter from Fotodiox that works fine for me. The Olympus to PK adapter contains corrective optics that might influence the quality.
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