PKMM Mount Adapts Nikon Olympus and Other Lenses On Pentax Cameras Popular Photography Magazine

“The PK+MM Mount would do something pretty remarkable to a wide range of Pentax DSLRsu2014it would give you the ability to mount hundreds of other lenses, by totally replacing the metal mounting plate for one with greater compatibility. The PK+MM mount transforms just about any K-mount camera into one that can also handle Nikon F, Olympus OM, Contax Yashica C/Y, and Konika AR glass.
The PK+MM Mount has an asking price of S$98, around $78USD. It’s a small metal ring that you use to replace the metal mount that’s usually on your camerau2014meaning that if you ever want to, you can just swap it back for the original.”

Original link

PKMM Mount Adapts Nikon Olympus and Other Lenses On Pentax Cameras Popular Photography Magazine

“The PK+MM Mount would do something pretty remarkable to a wide range of Pentax DSLRsu2014it would give you the ability to mount hundreds of other lenses, by totally replacing the metal mounting plate for one with greater compatibility. The PK+MM mount transforms just about any K-mount camera into one that can also handle Nikon F, Olympus OM, Contax Yashica C/Y, and Konika AR glass.
The PK+MM Mount has an asking price of S$98, around $78USD. It’s a small metal ring that you use to replace the metal mount that’s usually on your camerau2014meaning that if you ever want to, you can just swap it back for the original.”

Original link