C-Mount Lens to Micro 4/3 Adapter III, Chrome - Walmart.com
Metabones T Smart Adapter for Canon EF or Can MB_EF-M43-BT2 B&H
Lens Adapters for M4/3 Cameras
Nikon Nikkor S Rangefinder Lens to Micro Four Thirds (MFT, M4/3) Mount Mirrorless Camera Body Adapter – Fotodiox, Inc. USA
Metabones Leica M Lens to Micro Four Thirds Camera MB_LM-M43-BT2
STL file Leica M mount lens to M43 adapter・3D printer design to download・Cults
FOTGA Lens Adapter Ring for Olympus OM lens to Micro 4/3 M43 Mount Camera – FOTGA Official WebSite
STL file Eclair/Cameflex adapter to M4/3, M43 camera・3D print design to download・Cults
Amazon.com : Fotasy Manual EF EF-S Mount Lens to M43 Adapter, EF Mount to MFT, Compatible with Canon EF EFS lense Panasonic G9 GH5 II GX9 G90 G91 G95 G100 Olympus E-M1
Fotga Auto-Focus AF Lens Mount Adapter for Four Thirds 4/3 Mount Lens to Micro Four Thirds MFT M4/3 Mount DSLR Camera – FOTGA Official WebSite