The optical system of the new SP AF14mm F/2.8 Aspherical (IF) lens, composed of 14 elements in 12 groups, includes two Hybrid Aspherical lens elements. These large Hybrid Aspheric elements efficiently compensate for aberrations thus achieving flat-field image depiction from corner to corner. With a fast F/2.8 aperture and a sophisticated optical system, photographers can create dynamic photographs that take full advantage of the rectangular characteristics of the lens.
Specifications Lens Construction: 12 Groups/14 Elements Angle of View: 113? Minimum Aperture: f/22 Filter Diameter: Rear Filter Mount for Gelitan Filters Weight 23 oz. Length: 3.5 in. Diameter: 3.4 in. Included Accessories: Lens Cap and Case warranty