1、Wide Compatibility: Lens mount adapter is fit for EF mount lenses and fit for NEX series camera systems, including but not limited for a9, a7R3, a7R2, a7M3, a7M2, a6500, a6300, a7R, a7S2, a7S, a7, NEX7, a6000, and a5100. 2、Expandable Base: The adapter base allows for easy mounting of your camera onto tripods or other devices. With a 1/4 screw hole, it is compatible with most standard equipment available in the market. 3、Perfect Fit: The adapter securely fits the camera and lens with a precise 1:1 opening, ensuring a seamless and hassle free installation and removal process. 4、Rich Functionality: Equipped with metal contacts, adapter retains the functionality of your lens and camera, including autofocus, automatic aperture, and auto exposure. A switch button allows for effortless switching between phase detection and contrast detection autofocus. 5、Exquisite Craftsmanship: Constructed with aluminum alloy material and finished with an anodized oxidation process, lens mount adapter boasts impressive durability and a refined aesthetic.