This high speed, single-focal-length lens lets you capture beautiful, expressive images with a delicate soft focus and high contrast. The versatile 20mm focal distance (equivalent to 40mm on a 35mm film camera) is suitable for anything from daily snapshots to creative and portraiture work. Made up of seven lenses in five groups, the lens system uses two aspherical lenses most to cut down on distortion and chromatic aberrations. Seven blades give the aperture a rounded shape that produces an attractively smooth effect in out-of-focus areas when shooting at larger aperture settings. This lens also features a highly reliable metal mount, and uses multi-coated lens elements that minimise ghosting and flare to further enhance its optical performance.