EF-Mount Lens/Full-Frame Format.
Aperture Range: f/2.8 to f/32.
One Fluorite Element & Five UD Elements.
Air Sphere Coating.
Versatile telephoto zoom is designed for full-frame canon ef-mount dslrs, however can also be used with aps-c models where it provides a 112-320mm equivalent focal length range.
Canon ef 70-200mm f/2.8l is iii usm from canon is an l-series telephoto zoom distinguished by its bright design and advanced optics.