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F-Mount Lens/DX Format
25.5-75mm (35mm Equivalent)
Aperture Range: f/2.8 to f/22
Two FLD Elements
Buy Sigma AF 17-50mm f2.8 EX DC OS HSM lens for Nikon F
Sigma AF 17-50mm f2.8 EX DC OS HSM is a lightweight, versatile zoom range and bright design lens. The lens has f/2.8 maximum aperture to excel in available light conditions. Sigma AF 17-50mm f2.8 EX DC OS HSM lens has 2 FLD (Low Dispersion) elements along with a trio of aspherical elements to reduce a variety of aberrations and promote greater sharpness and clarity.
Sigma AF 17-50mm f2.8 EX DC OS HSM lens has a standard zoom lens is designed for DX-format Nikon F-mount cameras and provides a 25.5-75mm equivalent focal length range.
Constant f/2.8 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.
Two F Low Dispersion (FLD) elements are featured in the optical design and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy.
Three aspherical elements are used to help limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering.
Super Multi-Layer Coating has been applied to individual elements to minimize flare and ghosting for improved contrast and color accuracy when working in strong lighting conditions.
Hyper Sonic Motor (HSM), along with an internal focusing design, realizes quick and quiet autofocus performance as well as full-time manual focus override.
Minimum focusing distance of 11" and a 1:5 maximum magnification ratio benefits working with close-up subjects.
17 to 50mm (35mm Equivalent Focal Length: 25.5 to 75mm)