Nikon 200-400mm f/4G ED-IF AF-S VR Zoom Nikkor Lens for Nikon Digital SLR Cameras Vibration Reduction (VR) operation offers the equivalent of using a shutter speed 3 stops faster. Two VR Modes - normal or active for taking pictures with extreme movement - Automatically detects when photographer is panning and compensates. Compatible with Nikon TC-14E II, TC-17E II and TC-20E II Teleconverters. AF operation only with TC14E II. Exclusive Silent Wave Motor (SWM) enables ultra-high-speed auto focusing with exceptional accuracy and powerful super-quiet operation. 4 Extra-low Dispersion (ED) glass elements minimize chromatic aberration and provide higher resolution and superior contrast. Minimum focus distance of 6.2 feet at all focal lengths.