Pentax K Auto Focus Mount (PK AF) Lens to C-Mount Cameras - Pro Adapter – Fotodiox, Inc. USA
FotodioX Pro Shift Mount Adapter for Pentax PK-EOS-FXRF-PRO-SHFT
Amazon.com : Fotodiox Pro Lens Mount Adapter Compatible with Pentax K Auto Focus Mount (PK AF) DSLR Lenses to Nikon Z-Mount Mirrorless Camera Bodies : Electronics