From the Great Wall 120 roll film SLR. L39 thread but much larger lens to film plane distance. Apparently the only lens made for the camera, despite it's interchangeable capability. Some handy m4/3 extension tubes, an L39 to m4/3 adapter, and voila, focusing from 1m to infinity on the E PL1. Very poor wide open, but marginally OK by f8. Great for soft focus portraits.