The Leica APO-Macro-Summarit-S 120mm f/2.5 Lens is a superior-quality close-up lens with a reproduction scale of 1:2 and a high-speed telephoto. This reference-class lens, with special grades of glass and aspherical surfaces, displays consistently high image performance utilizing an inner focusing system with a floating element. This lens is suited for many applications due to its superb close-up and telephoto capabilities. It displays maximum performance even at full aperture settings. Vignetting, distortion and chromatic aberrations have been minimized to such a high degree that the need for quality-degrading image corrections and simplifying digital post-processing is substantially reduced. It has its own Leica-designed microprocessor for precise autofocus and iris diaphragm control with silent gearing and it has a focus ring with enough drag to let the user to override the autofocus at any time. supports autofocus and auto exposure control, and also maintains infinity focus, with all S-system lenses, including those with central shutters.