Sigma DC HSM Zoom Lens for Canon Standard Art for DSLR (Sigma) 50-100mm F1.8 EF-S Mount, APS-C Series, Cameras.

It covers a focal range equivalent to more than three prime lenses, with focal lengths of 85mm F1.8, 105mm F1.8, and 135mm F1.8 (35mm equivalent), making it suitable for portrait photography that utilizes background blur. Three FLD ("F" Low Dispersion) glass elements, one SLD (Special Low Dispersion) glass element, three high-refractive-index SLD glass elements, and one high-refractive-index high-dispersion glass element are precisely positioned to thoroughly correct axial chromatic aberration and lateral chromatic aberration. By using one or more low-dispersion glass elements in each group, high image quality is achieved across the entire zoom range and the entire focus range. An inner focus and inner zoom system that does not change the overall length. Canon EF-S mount 50-100mm F1.8 Zoom Telephoto DSLR APS-C