Mitakon Zhongyi Canon FD Lens to Sony E-Mount Camera Turbo Mark II Adapter, 4 Elements/ 4 Groups Mitakon Canon FD Lens to Sony E-Mount Camera Turbo Mark II Adapter - Front Adapter Cap - Rear Adapter Cap - Mitakon 1 Year Limited Warranty Compatibility: Canon FD Lens to Sony NEX Camera Crop Factor: 0.726x Optical Construction: 4 Elements in 4 Groups including 1 ED Element Length: 1.18" (2.99cm)