The Panasonic LUMIX G 20mm f/1.7 II is a super bright high-speed compact single-focal length lens with superb optical performance. It boasts dramatic compactness and light weight despite its wide aperture that enables beautiful soft focus in the background allowing the subject to stand out. Comprised of seven lenses in five groups the lens uses two aspherical lenses to minimize distortion and chromatic aberration achieving incredibly high resolution corner to corner. It also features a versatile 20mm focal length (40mm equivalent on 35mm camera) and a durable metal lens mount.