The standard zoom redefined. Constant F2.8 24-70mm zoom with an unprecedented union of high resolution and creamy bokeh. No-compromise design and technology result in a constant F2.8 zoom lens that can fully utilize the potential of current and future high-resolution camera bodies. This peerless standard zoom covers a 24mm to 70mm focal length range, and is an ideal choice when ultimate image quality is required for portraits, scenery, snapshots, and more. A XA (extreme aspherical) lens element with superlative surface precision not only contributes to stunning corner-to-corner resolution and detail throughout the zoom range, but also plays a vital role in achieving smooth, soft bokeh that can be a powerful expressive tool in a wide range of photographic situations. The remarkable beauty of this lens’s bokeh is further enhanced by a 9-blade circular aperture design that contributes not only to smoothness, but to natural highlights as well.