Leica Super-APO-Summicron-SL 21 f/2 ASPH. in a nutshell
The Leica Super-APO-Summicron-SL 21 f/2 ASPH. is the world's first APO lens with a focal length of 21 mm. With this focal length and 91.7° angle of view, you can tackle a wide range of photographic challenges. In addition, the minimum focusing distance of 21 cm also lets you get close to your subject, while the large aperture of F/2 at this distance offers additional creative possibilities.