Key FeaturesFull-Frame Format | f/1.4 to f/16Extremely Fast Design, Advanced OpticsVoice Coil Motor (VCM) for Rear FocusNano USM for Fast Floating AutofocusManual Iris/Full-Time Focus RingsAir Sphere (ASC) CoatingTwo Aspherical Elements, One UD ElementRounded 11-Blade DiaphragmWeather-Sealed Design
