Canon EF 24-70mm f/2.8L II USM Lens w/ lens gears

EF-Mount Lens/Full-Frame Format Aperture Range: f/2.8 to f/22 One Super UD Element, Two UD Elements Three Aspherical Elements Super Spectra and Fluorine Coatings Ring-Type Ultrasonic Motor AF System Weather-Sealed Construction Rounded 9-Blade Diaphragm