This is a large-aperture standard zoom with a short minimum focal length of 24mm. It is also good for wide-angle photography using digital SLR cameras which have a screen size smaller than 35mm. Use of two types of aspherical lens elements and a UD lens element corrects the magnification-type chromatic aberration often seen at wider angles, for extremely high picture quality.
While on the one hand employing a no-compromise dust-proof and drip-proof*1 construction, on the other hand the quiet and fast autofocus, the mechanical full-time manual focus, and the broad zoom ring make the lens easy to use, while the circular diaphragm delivers a beautiful blur effect. The closest focusing distance is 0.38m, and the magnification is 0.29x, making the lens ideal for close-up photography.
*1 Dust-proof and drip-proof models: EOS 1Ds Mark III, EOS 1Ds Mark II, EOS 1Ds, EOS 1D Mark III, EOS 1D Mark II N, EOS 1D Mark II, EOS 1D, EOS 1V/HS