Maintaining Leica's optical legacy, the Leica 50mm f1.4 Summilux-SL Asph Lens delivers on image quality, performance and overall premium feel. This lens is built to the same standard as all Leica lenses, providing phenomenal edge-to-edge sharpness & image quality. This lens is afforded a wide, bright, fast and versatile maximum f1.4 aperture which allows for expressive control of depth-of-field and flexibility when shooting in low-light, or difficult lighting situations. This aperture system is complemented by an advanced optical design that's comprised of 11 elements in 9 groups, including 2 Aspherical and 4 Anomalous particle dispersion elements, which combined provide that Leica-standard, incredible imaging performance throughout the focal range. This lens has the Leica-premium look and feel, and features a moisture and dust resistant build, allowing for use in adverse weather conditions.