Lens construction: 11 elements in 8 groups (includes 1 aspherical element) Focal length (35mm format equivalent): 35mm Angle of view: 63.4Deg. Max. aperture: F/1.4 Min. aperture: F/16 Aperture control Number of blades: 7 (rounded diaphragm opening) Stop size: 1/3 EV (22 stops) Focus range: 0.23"/0.6cm - Infinity Max. magnification: 0.1x Filter size: 62mm External dimensions: 72mm x 63mm (Diameter) / 2.83 x 2.48 inches Weight: 10.58 oz