NF-E1 mount adapter is designed to allow for F-mount series lens to be used on Sony camera with E-mount lens. By adapter mounting it can achieve functions of EXIF signal transmission, and adjustable aperture,etc. Built-in cupric metal electronic contacts.quickly detect and accurately focus,effective, brings you a better shooting experience. It can realize adjustable aperture from camera body to lens's aperture. Compatible with:for Sony E-Mount camera such as Sony A9 A7RIII A7RII A7II A7S A6000 A6300 A6500 A5100 NEX-7 NEX-5 NEX-5N NEX-3C with EF/EF-S Lens. Specification: Model:NF-NEX Mount Adapter Compatible Lenses: F series lenses Compatible Cameras:Sony E-mount Series Cameras Focus : Manual focus Tripod Socket:Cu1/4inch 1 ( non-collapsible ) Diameter and Length:61mm29mm Weight:Approx. 92 g (Excluding ) Package Includes: 1 Piece Manual Focus Adapter for NF-NEX