The Sigma 150-600mm F/5-6.3 DG OS HSM C is a super telephoto lens, which you can use with your full frame camera to take nature and sports photos. The front element of the lens has a water resistant coating. This allows you to photograph during a rain shower. The image stabilization recognizes sideways motion, for example when following a subject, and it adjusts the stabilization accordingly. Easily focus with the manual focus ring. The FLD and the 3 SLD lens elements prevent lens errors while taking pictures in bright light. The optical design consists of 20 elements, divided over 14 groups.