The Commlite lens mount adapter with ND filter for Canon EF / EF-S to Canon RF allows you to use a Canon EF/EF-S lens on a Canon EOS RF camera. Electronic communication between a connected camera and the lens is supported, enabling autofocus and automatic exposure functions. On a connected lens is capable of generating Exif metadata, this adapter is designed to transfer information so that it can be saved with the image files generated by the lens and Canon camera combination. The Commlite lens mount adapter with ND filter also has a convenient variable neutral density filter.