Pairing speed and stellar optics, the Leica Summilux-M 90mm f/1.5 ASPH. is a fast portrait-length lens offering impressive subject separation using an especially shallow depth of field. The bright f/1.5 design is ideal for portraiture but also suits working in low-light conditions. Beyond the fast design, this 90mm f/1.5 is also distinguished by its advanced optical composition that incorporates a pair of aspherical elements to ensure high sharpness and low dispersion, and a floating element system is also employed to maintain consistent image quality throughout the focusing range from 3.3' to infinity. Additionally, this lens has an 11-blade diaphragm to produce an especially pleasing, rounded bokeh quality and a built-in lens hood helps to prevent lens flare and ghosting.