Sony SAL-28F28 28mm f/2.8 Wide Angle Lens for Sony Alpha Digital SLR Camera 28mm wide-angle lens with f/2.8 maximum aperture for Sony Alpha digital SLR cameras Produces sharp, high-contrast images when shooting group, landscapes, or urban scenes Wide-angle optics and deep depth of field; 5 lens groups and 5 elements Built-in sliding lens hood protects optics; compact size is ideal for traveling Measures 2.56 inches in diameter and 1.56 inches long; weighs 7 ounces