BRAND NEW AND STILL SEALED (REGULAR SRP) The design has a built-in aperture motor and an electronic contact, which can control the aperture of the lens by means of an electronic contact & The aperture control function almost supports all Canon EOS M cameras, and you can adjust aperture directly from the camera side to control the actual aperture of the lens. The design of gold plated PIN has excellent signal transmission performance while it supports EXIF signal transmission. Built-in IS stability, making your focus more precise and clear, which better help you take pictures. Designed with 1/4 screws at the bottom, which can be mounted on the tripod or other retention frame;Zinc-plated alloy technology, with a strong and stable performance.