This lens mount adapter ring is mainly used for connecting the for " K Mount Lens" to "cameras with for NEX E Mount".Suitable for NEX E Mount camera, such as for NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7 etc.Completely manual control, manual focus and manual exposure.There is no electrical connection on the ring so diaphragm control of the lens is set manually.It can focus to .Easy and smooth to install, remove and operate lens.Equipped with lock and stop pin.Made of high-quality material, durable for long time .Material: MetalColor:Black lens: for K Mount Lens camera: for NEX E Mount CameraItem size: Approx. 6 * 6 * 3.2cm / 2.4 * 2.4 * 1.3inPackage List:1* Adapter RingOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.