Super telephoto zoom lens series sigma dg sigma ex lens mount nikon f lens speed 56 focal length 300 800 mm zoom factor 27 times suitable for sensor types aps c full frame construction zoom lens area of use sports photography animal photography image stabiliser focus internal focus auto focus manual focus af motor ultrasonic motor usm apochromatic max magnification 16 9 closest focusing distance 600 cm lens type eda lens construction gro