Opteka .35x Wide Angle Fisheye Lens with Macro for Pentax K Mount DSLR Cameras | eBay
Amazon.com : Wide Angle/Macro Lens FOR THE PENTAX K-7 K-X Digital SLR CAMERAS.THIS LENS WILL ATTACH TO ANY OF THE FOLLOWING PENTAX LENSES 18-55mm, 50-200mm : Electronics
Vintage Vivitar 50mm F1.7 Prime Lens for Pentax K Mount - Etsy
Mamiya 645 (M645) Mount Lenses to Pentax K (PK) Mount SLR Camera Body Pro Mount Adapter – Fotodiox, Inc. USA
Minor Surgery to fit a Pentax K mount lens to a Canon Full Frame camera | Phil's Blog
LA-KE1 - Pentax K-mount lenses to Sony E-mount cameras adapter (FW v03 – MonsterAdapter
Amazon.com : Pentax DA 35mm f2.8 Macro Lens for Pentax K Mount Camera : Camera Lenses : Electronics