Focal lenght: 15 mm (equivalent to 30 mm on a 35 mm camera) : Aperture: F8 fixed Dimensions :Max.dia.Ø56(2.2in.)× length 9 (0.4 in.) mm Design: 3 groups, 3 lenses Focus: 0.30 m (11.8 in.) to infinite. Manual Focusing (Three settings) Weight: 22 g (0.8 oz.)