Three aspherical elements and apochromatic correction eliminate color fringing for outstanding sharpness across the frame, even at its f/2 maximum aperture. The lens weighs just 270 grams in a weather-sealed, all-metal barrel with Hydrophobe Aqua-Dura coating, combining durability with a discreet profile. It suits Leica M-mount street and portrait photographers who demand a compact, manual-focus prime with uncompromising optical precision.