Pairing a useful range of telephoto focal lengths with an especially fast design, this Nikon F-mount Sigma 50-100mm f/1.8 DC HSM  is an Art-series zoom mixing impressive versatility with advanced optics. Sigma 50-100mm bright f/1.8 constant maximum aperture offers consistent low-light performance throughout the zoom range and also affords greater control over focus placement for shallow depth of field and selective focus applications. The optical design incorporates a series of low dispersion and high-refractive index elements, which help to achieve high clarity and sharpness by suppressing various aberrations, color fringing, and distortion. A Super Multi-Layer Coating has been applied, too, which controls lens flare and ghosting for improved contrast and color accuracy. Balancing the optical merits, this 50-100mm also sports an advanced Hyper Sonic Motor, along with an internal focusing and zoom design, to promote fast, quiet, and precise autofocus performance. Additionally, a tripod collar is integrated into the lens's design for greater stability when working atop a tripod or monopod.

• As part of the Art line within Sigma's Global Vision series, this lens is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications.
• Wide-angle prime is designed for full-frame Nikon F-mount cameras, however is also suitable for APS-C models where it provides a 56mm equivalent focal length.
• Impressively bright f/1.4 maximum aperture is well-suited for working in low-light conditions and also provides greater control over the focus position when using shallow depth of field techniques.
• One F Low Dispersion (FLD) element and four Special Low Dispersion (SLD) elements are featured in the optical design, and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy.
• Two aspherical elements are used to help limit distortion and spherical aberrations and also contributes to greater overall sharpness and accurate rendering.
• Floating elements system helps to realize consistent optical performance throughout the focusing range, from 11.8" to infinity.
• A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions.
• Rounded nine-blade diaphragm contributes to a smooth and pleasing bokeh quality.
• The integrated HSM (Hyper Sonic Motor) realizes quick and quiet autofocusing, which is further complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time.
• The bayonet mount is constructed from brass for ensured accuracy and durability. Additionally, rubber sealing is incorporated in the mount design to render it dust- and splash-resistant.
• This lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware.

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