The brilliant long-distance lens with wide aperture and fast auto-focus response. For definitive long-shot precision and spectacular portraits even in low light, this professional G-Series lens raises the standard of DLSR performance. Its 35mm-equivalent 450mm focal length and ultra-bright f2.8 aperture combine for superb results in virtually any light -- and its high-speed SSM (Super Sonic wave Motor) auto-focus is fast, accurate and quiet.