Sigma 50–100mm f/1.8 DC HSM Art is a fast telephoto zoom for APS-C Canon EF cameras, offering an 80–160mm equivalent range with constant f/1.8 aperture. Suitable for both photography and video, it features a complex optical design with 21 elements, including 3 FLD and 4 SLD elements for excellent sharpness, contrast, and reduced chromatic aberrations. Super Multi-Layer coating minimizes flare and ghosting. Ring-type HSM autofocus is fast with full-time manual override. Internal focusing and zooming keep dimensions constant. A 9-blade diaphragm produces smooth bokeh. Supplied with a hood and tripod/monopod collar. Included: Sigma 50–100mm f/1.8 DC HSM Art lens, front and rear caps, hood.