VILTROX NF-E Manual-Focus F Mount Lens Adapter Compatible with Sony E Mount Camera,Sony A7ii A7s A7r a6300 This adapter ring allows you to use the Nikon F Lens on the Sony E Mount camera body, it's saving you the expense of a costly and irreversible conversion. Suitable for Nikon AI lens mount to Sony NEX cameras. This adapter reduces focal length to 0.71x , to adjust the image size to near 1:1 so that the focal length of the image is close to actual focal length of the lens, e.g. 50mm x 1.5 x 0.71 = 53.25mm. Please note : This mount is manual aperture control. It does NOT support electronic aperture control. With the tripod foot ,The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads