M42 Screw Mount SLR Lens to Micro Four Thirds (MFT, M4/3) Mount Mirrorless Camera Body Adapter, with Built-In Variable ND filter – Fotodiox, Inc. USA
Amazon.com : K&F Concept Lens Mount Adapter Compatible for Leica M42 Screw Mount Lens to M4/3 M43 Micro Four Thirds Mount Camera with Matting Varnish : Electronics
K&F Concept M10121 M42 Lenses to M43 MFT Lens Mount Adapter - KENTFAITH
Adapter M42 Objektiv lens to an micro 4/3 m4/3 MFT Olympus Panasonic Pen Lumix G | eBay
The best m42 adapter for MFT is not an adapter! - YouTube
FotodioX Mount Adapter for M42 Lens to Micro Four Thirds M42-MFT
Tilt Shift T&S Lens Adapter for M42 Screw Lens to Micro 4/3 M43 MFT Mount Camera | eBay
Tilt Shift Adapter for M42 Mount Lens on Micro Four Thirds M4/3 MFT Camera | KIPON
Quality / usability of m42 adapter?: Adapted Lens Talk Forum: Digital Photography Review