EF-Mount Lens/Full-Frame Format Aperture Range: f/2.8 to f/32 One Fluorite Element & Five UD Elements Air Sphere Coating Ring-Type Ultrasonic Motor AF System Optical Image Stabilizer Internal Focus, Focus Range Limiter Weather-Sealed Design, Fluorine Coating Detachable, Rotatable Tripod Collar Rounded 8-Blade Diaphragm