Fringer EF-FX II Adapter for Canon EF Mount and Fujifilm X Mount with Fast PDAF and EXIF RecordingThe Fringer EF FX II Smart Adapter has a brass lens bayonet and an alloy camera bayonet. It requires the need to set the aperture through the camera body. Phase Detection Auto Focus It offers fast and accurate PDAF (Phase Detection Auto Focus) on cameras with X Trans II, III, and IV CMOS and for optimized lenses that are compatible with it. Compatibility It is compatible with Canon EF mount and Fujifilm X mount protocols. Use It can control the lens