Nikon 500mm f/4.0G ED VR AF-S SWM Super Telephoto Lens for Nikon FX and DX Format Digital SLR Lightweight, convenient, Super Telephoto lens optimized for edge-to-edge sharpness on both the Nikon FX (23.9 x 36mm) and DX-format image sensors Vibration Reduction minimizes the effects of camera shake allowing photographers to shoot at as many as four shutter speeds slower than would otherwise be possible, assuring dramatically sharper images New Tripod Detection mode reduces vibration that may occur due to shutter release when mounted on a tripod Nikon's Silent Wave Motor (SWM) enables ultra high-speed autofocusing with exceptional accuracy and powerful, super-quiet operation Exclusive Nano Crystal Coat and a meniscus protective glass element combine to further reduce ghosting and flare for even greater image clarity