Outstanding corner-to-corner g lens resolution throughout the zoom range and beautiful g lens bokeh 
 Fast precise quiet AF that tracks moving subjects with extreme accuracy 
 Optional 1 4x and 2 0x Tele Converters extend the lens’s focal length to a maximum of 1200mm at F13 with outstanding image quality and AF performance 
 Refined control and reliability for use in the field 
 Dust and moisture resistance