Sigma 200-500mm f/2.8 APO EX DG Ultra-Telephoto Zoom Lens for Canon DSLR Cameras.
Aperture of F2.8 at the 500mm focal length and F5.6 at the 1000mm. Covers widely-used focal lengths from 200mm to 500mm. For the convenience of the photographer, focusing distances and focal lengths can be viewed on the lens’ built-in LCD panel.
Whether your subject is standing close by or happens to be a few miles away, this ultra-telephoto zoom lens will get the shot.
Use it for portraits, wildlife, sports, astrophotography.