A telephoto lens for many occasions. Virtually unmatched. With the Leica Apo-Summicron-M 90mm f/2 ASPH. light fall-off is very low. Its fast aperture lets you shoot at a relatively short exposure time even in dim light. The result is a minimized camera shake, even when shooting street scenes from a distance. The APO-Summicron-M 90mm f/2 ASPH. is ideal for photojournalism, theatre and even portrait photography.