The Sigma 60-600MM f/4.5-6.3 DG OS HSM Sports is a super telephoto lens with 10x optical zoom. This lens is suitable for sports, nature, and animal photography. The front and rear elements of the lens are equipped with a water-repellent coating which makes it possible to photograph during a rain shower. With the advanced image stabilization of 4 stops, side-way movements are recognized and motion blur is reduced. Thanks to the lens construction with 25 elements in 19 groups, you have consistent image quality over the entire zoom range. In combination with a TC-1401 1.4x converter, you can expand the focal length up to 840mm. This means you'll have an even larger zoom range at your disposal. Place this converter between the camera and the lens.