This fast telephoto zoom lens is a complete redesign of Sony’s first FE 70-200mm F2.8 G Master. The new optical design provides corner to corner sharpness throughout the zoom range. The autofocus system is built around two pairs of XD (Extreme Dynamic) linear motors driving two focus groups, which provides faster focusing and improved focus tracking. Video shooters will appreciate the aperture ring that can be operated in either clicked or clickless mode, as well as reduced focus breathing and focus shift. Despite all these improvements the lens is nearly a third lighter than the original version.