Features: Experience rapid and precise autofocus with our high performances Ultrasonic Motor suitable for EF 50mm f/1.4 lens This metal ultrasonic rotor motor operates with minimal noise, ensuring efficiency and reliability for every shot you take. Suitable for professional photographers and enthusiasts alike who demand superior images quality in their work. Whether capturing portraits, landscapes, or wedding photos, this motor ensures your images setting. Elevates lens performances with this essential motor upgraded, and captures lifes moment with unparalleled Specifications: Component:Metal Size:Approx.1cm/0.39inch Package Includes: 1Pc Lens Motor Rotor note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.