The Sigma 50-100mm F1.8 DC HSM Art lens for Nikon F mount delivers an extraordinary combination of focal length range and constant maximum aperture, giving you the versatility of three premium telephoto primes in a single, expertly engineered package. With its bright F1.8 constant aperture throughout the entire zoom range, this high-performance telephoto lens excels in low-light photography, portraits, and event work whilst maintaining the shallow depth-of-field control typically reserved for prime lenses. The refined optical design features low-dispersion and high-refractive index glass elements that suppress aberrations and colour fringing, whilst the Super Multi-Layer Coating reduces flare and ghosting for superior contrast. An advanced Hyper Sonic Motor provides fast and quiet autofocus with the ability to manually override at any time, and the internal focusing and zoom mechanisms keep the lens length compact and balanced. Constructed from thermally stable composite materials with a fixed rotating tripod collar, this Art-series masterpiece delivers outstanding image quality for demanding photographers working with Nikon DX-format DSLRs.