2d 352D3D perovskite heterojunctions represent a promising approach to enhance the efficiency and stability of perovskite solar cells (PSCs).Nikon also refers to the AF-D version as the AF 35mm f2D. This 352D is sharp, small, lht and fast. For FX and 35mm cameras, this is a superb lens. Done. For DX cameras, use the 351.8 DX instead. It's less expensive and is optimized