Leica 50mm f/2 SUMMICRON-R Standard Manual Focus Lens for R System - USA Description A universal lens with outstanding imaging quality, even in the near-focusing range. Ideally suited for travel photography, because its 41 mm length (1 5 /8 ") and 300 gram weight (10 1 /2 ounces) make it unusually compact and handy. The shortest focusing distance is 50 cm or 1' 7 3 /4 ". In spite of its high speed, it distin-guishes itself by its outstanding sharpness, high contrast and excellent detail resolution, even at full aperture. Specifications Construction4 Groups / 6 Elements Angle of view45° F stop range2-16 Closest Focusing Distance1.7' Maximum Magnification1:7.5 Filter SizeE 55 Dimensions (Length x Diameter)1.6" x 2.6" Weight0.64 lb