Meike 8mm F2.8 Prime Manual Focus Ultra-wide Angle And Zero Distortion Lens For Panasonic Lumix/ Olympus Micro 4/3 M43 Cameras - Camera Lenses - AliExpress
M42 and other lenses – Rewind Cameras
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
Wide Angle Lens M42 MC MIR-24M 35 mm F2 Ultra Sony Nikon Canon Prime MINT - C44 | eBay
Meike 8mm F2.8 Prime Manual Focus Ultra-wide Angle And Zero Distortion Lens For Panasonic Lumix/ Olympus Micro 4/3 M43 Cameras - Camera Lenses - AliExpress