Sigma 8-16mm F/4.5-5.6 DC HSM Lens For Canon

Sigma (203954) 8-16mm f/4.5/5.6 EX DC HSM Lens for Canon EOS DSLRs (EF). This compact ultra-wide zoom lens is a Sigma DC Series model designed for use exclusively on digital SLR cameras with an APS-C sized sensor, giving the equivalent of a 12-24mm lens on a 35mm format camera. It has an exaggerated perspective, giving a different view of the world ideal for special effects.There are three aspherical lenses, two glass mould lenses and one hybrid aspherical lens for excellent correction of spherical aberrations and astigmatism. In other words the sharpness is fantastic, especially for such a wide angle lens. A Hyper Sonic Motor (HSM) is used which gives fast and quiet focusing with full time manual focus override whenever the need arises. There is Inner Focusing for consistent image quality throughout the entire zoom and