The Tamron 24-70mm f2.8 Di VC USD SP Lens is a high-speed, standard zoom, Super Performance (SP) Lens with built-in Vibration Compensation (VC) and Ultrasonic Silent Drive (USD). Tamron’s VC enables you to shoot hand-held in dimly lit conditions and use speeds up to four stops slower than normal. This compact, lightweight lens incorporates special high-grade glass in three LD elements, three glass molded aspherical lenses, one hybrid aspherical lens and two Extra Refractive (XR) elements to deliver exceptional images. The USD provides quick AF (Auto Focus) that’s quiet, together with full-time manual focus override. Along with its moisture-resistant construction, the Tamron 24-70mm f2.8 Di VC USD SP Lens is equipped with a fast maximum aperture of f2.8 to ensure natural out-of-focus areas with a shallow depth of field.