Note: this lens can feel heavy in combination with a light camera body. The Sigma 100-400 mm f/5-6.3 DG OS HSM C Canon is a super telephoto lens for nature, animal, sports, and macro photography. With the large zoom range, you can zoom in on faraway subjects. The optical image stabilization reduces motion blur caused by vibrations. This can come in handy if you're using handheld photography during a safari, for example. You can easily zoom in and out with the special zooming mechanism. The special lens elements and coating ensure sharp and clear photos.