Canon EF Lenses to M43 MFT Mount Camera Adapter
I bought this to adapt my Canon EF lenses to my Lumix GX8 and G9. The adapter fit nicely on both cameras and on my EF 200 f/2.8 L I. But it would not fit anywhere nearly correct on four other lenses I tried it on (mount would jam tight after about a 1/4 inch turn, long before it could be twisted to lock): 28 f/2.8 IS, 50 f/1.8 STM, 400 f/5.6 L, and EF 2X II. So it was returned.