This lens has an EF type mount, that fits the Canon EOS line of cameras.

When used on a digital EOS body with a field of view compensation factor of 1.6x, such as the Canon EOS 7D, it provides a narrow field of view, equivalent to a 56–560mm lens mounted on a 35mm frame body.

As an L-series lens, it features two ultra-low dispersion (UD) elements, and utilizes Canon's ring USM for fast and silent focusing.

It has a push-pull zoom design with the possibility to lock the lens at the desired focal length.

The lens exhibits strong barrel distortion and chromatic aberration at the wide end.