Metabones Smart Adapter Mark IV for Canon EF or Canon EF-S Mount Lens to Sony E-Mount Camera (MB_EF-E-BT4) with Replacement NP-FW50 Battery & Microfiber Cleaning Cloth Canon EF or EF-S Lens to Sony E Body; Third Party EF or APS-C EF to Sony E Supports Electronic Communication; Enables Use of Lens Autofocus Enables Lens Aperture and Stabilization; Adapter Interior Minimizes Reflections Locking Mechanism to Secure Lens; Push-Button Lens Release Brass Mounting Rings; Detachable Tripod Foot