Pentax 645 mount P645 lens to Pentax K Mount PK Adapter - K10D K200D K – Roxsen.com
Amazon.com : NEEWER Lens Mount Adapter Manual Focus Ring Compatible with Pentax K Mount Lens to Sony E Mount Camera Including Alpha 1 A9 A7 A7C A7R A7S A6600 A6400 A5000 NEX-7