Review on 💡 Commlite CM-AEF-MFT Booster: Canon EF Lens to M4/3 Micro Four Thirds 0.71x Speed Booster Autofocus Adapter for Panasonic GH4, GH5, GH5S, GF6, GF1, GX1, GX7 & Olympus E-M5, E-M10, E-PL5 by Chris Bertoli

Bought this for my Blackmagic Pocket Cinema 4K camera and it works great. I have several adapters from Metabones, but I wanted to try this one and was not disappointed. In fact, I don't see any visual difference to the Metabones Speedbooster when editing, although it costs three times less than the Metabones. The Commlite fits snugly into the camera body and the lens fits perfectly. I tested it with several lenses but my choice is the Sigma Art series. Electronic iris control works great on these lenses, but you'll need to test each lens individually. Commlite seems to update its firmware fairly quickly, so I'm sure it will be reliable in the future. Highly recommended.