This Pro Lens Adapter from Fotodiox enables the use of your Sony A lenses on Nikon F mount SLR and DSLR cameras. It features a durable brass construction with stainless steel finish, a leaf spring ensures a secure connection between the lens and adapter, and its design also maintains infinity focus through the use of a 1.4x multi-coated focus correction lens. Additionally, benefitting working with lenses that lack an aperture ring, this adapter also features a built-in iris control to adjust the amount of light let into the camera.