Vibration Reduction (VRII) minimizes the effects of camera shake allowing photographers to shoot handheld at as many as 4 shutter speeds slower than would otherwise be possible, assuring dramatically sharper images. ED glass minimizes chromatic aberrations, contributing to superb contrast and resolution performance. Internal Focus (IF) provides fast and quiet auto focusing without changing the length of the lens, retaining subject-working distance through the focus range. Focus as close as 4.9 ft throughout entire zoom range. Non-Rotating front element provides for convenient use of circular polarizing filters and the Nikon Wireless Close-Up Speedlight System. A Silent Wave Motor (SWM) enables fast and quiet autofocusing, along with quick switching between autofocus and manual operation (M/A and M).