NF-E mount f/booster series can allow Sony E-mount to be transferred on the Nikon F and G series perfectly,stop adjustable aperture,fully compatible with Nikon’s transmission system, support c manual focus,enlarge aperture. With auto focusing function, can increase the lens 2 f-stop, increasing the amount of light into the virtual background, can better highlight the theme. Aperture can be accurate through ring expansion corresponding action. Zinc alloy technology, stable and reliable. Signal transmission using PIN gold needle, greatly enhance its transmission performance. Ring at the bottom with 1/4 screws, which can easy installed on the tripod or other fixed bracket.