Originally Posted by View Range
Novoflex makes a broad range of adapters with exquisite machine work. You do pay a price for Novoflex quality.
Indeed, I have a Novoflex LEM/PENT-NT adapter that cost ~$300 new from B&H. It fits Pentax K mount lenses to Leica M, and importantly features its own aperture ring to set the f-stop on PK lenses that have no aperture ring of their own. Works very nicely in conjunction with the Olympus VF-2 electronic viewfinder identical to the Leica EVF2 except for the brand name and half the cost.