Brand: VILTROX Model: EF-E II Mount Adapter Compatible Cameras: APS-C format E-mount mirrorless cameras (e.g., Sony α6400) Included: Original box, instruction manual Release: 2020 This mount adapter incorporates a 4-group, 4-element reduction optical system. It reduces the focal length of EF-mount lenses by 0.71x and increases the aperture by approximately 3 stops, functioning as a speed booster. It allows you to enjoy the original angle of view of full-frame EF lenses on an APS-C camera. It supports EXIF signal transmission and AF (autofocus). It also allows switching of focus modes (contrast AF and phase-detection AF). Firmware updates are also possible. Used only a few times and is like new.