Fotasy NACG Pro Contax G Lens to Sony NEX E-Mount Camera Mount Adapter Allows Contax G lens to be used on Sony E-Mount NEX camera body. Superior quality, made of brass, anodized aluminum camera body mount, smooth surface finishing. With lock pin and lens release pin. With new 360 degree Focus Ring. 360 degree focusing ring in the round side of the adapter advance bigger size. Designed for Sony NEX-3 NEX-3C NEX-3N NEX-5 NEX-5C NEX-5N NEX-5R NEX-5T NEX-6 NEX-7 NEX-F3 NEX-VG10 VG20 Cameras and new models It is compatible lens: 35mm Planar, 45mm Planar, and 90mm Sonnar G-type Lens But not fit 21mm, 28mm and 35-70mm Zoom , (if you want use those size lens, need further adjustment for lens rear parts)