The 14-element optical design with three ED and one aspherical element delivers exceptional sharpness and suppresses aberrations even at its bright f/1.4 maximum aperture. Its robust, weather-sealed metal build and smooth, ring-type HSM autofocus system offer a premium handling experience that belies its price point. This lens is best for portrait and studio photographers using Nikon F-mount DSLRs who demand critical image quality and shallow depth of field control without the cost of first-party optics.