Amazon.com : Fotasy Adjustable M42 Lens to Cannon EF-M Mount Adapter, M42 EFM, M42 EOS M Adapter, Compatible with Canon EF M Mount Mirrorless Cameras EOS M M1 M2 M3 M5 M6
NEEWER M42-FX M42 to Fuji X Lens Mount Adapter - NEEWER – neewer.com
K&f Concept M42-nex Pro High Precision Lens Adapter For Sony Nex E Mount Cameras Professional Adapter Ring Transfer M42 Lens - Lens Adapter - AliExpress