The Leica Super-APO-Summicron-SL 21 f/2 ASPH. is the world's first 21mm APO lens, marking a milestone in lens technology. Equipped with the swift Dual Synchro Drive^TM autofocus, it delivers edge-to-edge clarity within a surprisingly compact design. This lens excels in diverse photography styles, be it landscapes, interiors, photojournalism, studio work or architecture. Its close focusing range down to 0.21 m enables stunning detail shots. The wide aperture further enhances creative possibilities through precise control of depth of field. Its unparalleled image quality and unique apochromatic correction are thanks to the 14 meticulously crafted lens elements, distributed in 11 groups, with three elements featuring aspherical designs.