High resolution performance: edge-to-edge sharpness from the center to the corners of the frame is achieved by the PRECISE arrangement of 10 Lens elements in 8 groups
Compact
Fast and quiet autofocus: the inner focusing AF system uses a stepping motor to move focusing elements into place through precise electrical pulses
Weather and dust resistant durability: The lens is designed to operate in temperatures as low as 14° Fahrenheit and is sealed at nine points around the barrel