DT 75-300mm f/4.5-5.6 telephoto zoom lens with 35mm equivalent of 112.5-450mm * compatible with Sony Alpha digital SLR cameras * minimum focus distance: 4.9 feet * minimum aperture: f32 (at 75mm)/f38 (at 300mm) * lens construction: 13 elements in 10 groups * attachment/filter diameter: 55mm * more info