Canon EF 24-105mm f/4L IS USM Lens Wide Angle Tele Photo Lv a voicemail msg or Email EF-Mount Lens/Full-Frame Format Aperture Range: f/4 to f/22 One Super UD Element Three Aspherical Elements Optical Image Stabilization Super Spectra Coating Ring-Type Ultrasonic Motor AF System Optical Image Stabilizer Weather-Sealed Construction Rounded 8-Blade Diaphragm