Amazon.com : Fotodiox Pro Lens Mount Adapter - M42 Screw Mount SLR Lens to Pentax K (PK) Mount SLR Camera Body & Replacement Rear Lens Cap Compatible with Pentax K Mount DSLR
Kipon Pentax M42 Screw Mount Lens to Pentax K Camera Lens Adapter KP-LA-PXK-PXS
M42 Lens To Pentax PK K Mount Adapter Ring Focus Infinity M42-PK with tool | eBay
Urth M42 to Pentax K Lens Mount Adapter | Urth US
Different M42 to PK-Adapters - a review: Pentax SLR Talk Forum: Digital Photography Review
Camera | Lens :: M42 -> Pentax K mount adapter
Pentax M42 To K Mount Bayonet Body Mount Adapter - Bristol Cameras
Dot Line Lens Mount Adapter for M42 to Pentax K Bayonet DL-0620
Amazon.com : Fotodiox Pro Lens Mount Adapter - M42 Screw Mount SLR Lens to Pentax K (PK) Mount SLR Camera Body : Electronics
K&F Concept M10221 M42 Screw Lenses to Pentax K Lens Mount Adapter - KENTFAITH