Sharp super-telephoto zoom, tenacious AfThe first super-telephoto zoom in Sonyf s flagship G Master series covers a versatile 100 mm to 400 mm range. With extraordinary resolution and fast, precise autofocus, it lets you capture distant action with outstanding quality and immediacy. In addition to world-class image quality, this fine lens offers the mobility, reliability, and operability that professional applications demand.g Master super-telephoto zoomA 100 mm to 400 mm zoom range is ideal for sports, wildlife and similar subjects, with image quality and Af performance that support professional working needs.Fast, tenacious autofocusAn optimal combination of double linear motor and Ddssm (Direct Drive Ssm) drive systems achieves quick response, high accuracy and tenacious tracking.High resolution and fast AF at any focal lengthPrecision G Master optics ensure consistently high corner-to-corner resolution at any focusing distance throughout the lensf zoom range.