The AF-S 500mm f/4G ED VR Lens from Nikon is a high performance fast super-telephoto prime lens for Nikon F mount cameras. It is compatible with both FX- and DX-format DSLRs and provides 750mm focal length equivalence on DX-format cameras. It is a robust and durable lens incorporating a magnesium die-cast barrel and professional-grade dust and moisture sealing allows it to be used in more rugged situations. It provides a very long reach and is effective for drawing in distant subjects, serving photographers involved in sports and wildlife photography as well as other long telephoto applications.