Specifications Focal Length & Maximum Aperture 28mm f/3.5 Lens Construction 11 elements in 10 groups Diagonal Angle of View 5155'; Focus Adjustment AF with full-time manual Closest Focusing Distance Normal Mode: 0.318 ft./0.097m Super Macro Mode: 0.305 ft./0.093m Filter Size Compatible only when hood attached 43mm (attaches to hood) Max. Diameter x Length, Weight 2.4 x 1.8 in. (lens retracted), approx. 4.6 oz. 60.9 x 45.5mm (lens retracted), approx. 130g