Feature： Made of high quality alloy, lightweight and suitable for long term use. Precision machined to ensure a perfect match with your camera. Both the camera side and lens side of the adapter are made of high quality aluminium alloy, precision machined and chrome plated. Precise fit and solid connection - the lens will not wobble when mounted on the adapter, and will fit the lens without any adjustment.  Specifications： Material: Aluminum alloy Applicable lens：for ALPA Mount lens Applicable camera：for NEX E mount Camera Color: black Package include：1 x Mount Adapter Ring  Note： There is no electrical contact in the adapter ring. Exposure and focus has to be adjusted manually. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other function will not operate correctly while using this adapter.