Sigma's 12-24mm F4.5-5.6 EX DG ASP HSM II Wide-Angle Zoom Lens (For Canon)
is designed for use with full-frame digital cameras, and offers a
dramatically ultra-wide, minimally distorted zoom lens with a field of
view from 122° to 84.1°. This range makes it ideal for the tightest of
interiors, as well as for dramatic landscape photography. Using a camera
with an APS-C sensor will give you an effective range of 17-35mm, also a
very attractive wide-angle zoom range.
One Special Low
Dispersion (SLD) glass element and four "F" Low Dispersion (FLD) glass
elements compensate for color aberration and deliver improved image
quality. Three glass mold elements and one hybrid aspherical lens give
you compact, lightweight construction (3.3" diameter x 4.7"/23.6 oz) and
Super Multi-Layer Coating on the lens
reduces flare and ghosting, while the Inner Focusing system keeps the
length of the lens unchanged when changing focus. The splash-proof
design helps protect the 12-24mm lens from the elements. This versatile,
sturdy lens will put drama into just about any subject you choose.
Equipped with HSM (Hyper Sonic Motor) for quiet, high-speed focusing, it also offers Full Time Manual Focusing.