The Sigma f/1.8 DC HSM 50-100mm Art is a tele-zoom lens aimed at photographers working with APS-C tele-zoom for sharper photos and a better photographic experience! The Nikon F-mount Sigma 50-100mm f/1.8 DC HSM is an Art-series zoom, pairing a useful range of telephoto focal lengths with a high-speed design, mixing advanced optics with impressive versatility. The consistent low-light performance throughout the zoom range is offered by bright f/1.8 constant maximum aperture. The lens provides greater control over focus placement, which facilitates the use of a shallow depth of field and selective focus applications. To achieve sharpness and high clarity by suppressing various aberrations, color fringing, and distortion, the lens's optical design incorporates a series of low dispersion and high-refractive index elements. Our Take on the Sigma f/1.8 DC HSM 50-100mm Art Lens: As part of the Sigma Art line, the Sigma 50-100mm f/1.8 DC HSM within the Global Vision series is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications. For DX-format Nikon F-mount cameras, the telephoto zoom is designed to provide a 75-150mm equivalent range of focal length. Impressive performance in difficult lighting conditions throughout the zoom range, which actually gets benefited through fast f/1.8 constant maximum aperture and selective focus techniques, allows increased control over focus while working. To reduce chromatic aberrations and color fringing throughout the zoom range, the lens uses four Special Low Dispersion (SLD) and three F Low Dispersion (FLD) elements markedly. Additionally, one high-refractive index high-dispersion element controls spherical aberrations and increases sharpness and clarity. The Sigma 50-100mm f/1.8 DC HSM has Super Multi-Layer Coating elements applied to minimize ghosting and flare. It also produces color-neutral imagery and contributes to a contrast-rich picture even in low-light conditions