What the manufacturer Nikon AF Nikkor 50mm f/1.8D lens is a high performance with the following specifications: Lens Construction: 7 elements in 6 groups Next number: 045m/1.5ft. Filter size: 52mm Dimensions: 2.5 x 1.7 cm Weight: 7.9 ounces Product Description Lens making is an art – Nikon artisans craft Nikkor optics from the finest materials are proud of their intellect and adding technology to the finest lenses the world to live. Push to the front edge of the lens harder in their efforts to "glass" that the world is more pictures.PRODUCT properties make D-lens design provides distance information as part of the process and flash exposure to ambient light; Classic Standard