Sigma 12 24mm f45 56 DG HSM II for Canon AF

This extra wide Full Frame zoom lens is successor to the 12 24mm EX DG lens. Its compact construction is ideal for travelling photographers and its performance is outstanding.The optical system includes the followingFour FLD Glass elements – performance equal to fluorite – ultra high light transmission and low refractive index, plus high anomalous dispersion – will correct secondary spectrum chromatic aberration, not possible to achieve with normal optical glassOne SLD Special Low Dispersion Glass element – excellent correction of chromatic aberrationThree aspherical elements and one hybrid aspherical element to retain edge to edge sharpness right through the zoom rangeSuper Multi Layer Coating for virtually eliminating ghosting and lens flareThis 12 24mm lens also has superior peripheral brightness borne out of extra care in design of front lens group.Focusing is super slick using the HSM Hyper Sonic Motor. It is an inner focus system which makes filter use far easier, and with Full Time Manual Focus you can make minute adjustments when focusing. Supplied with petal hoodAdditional SpecificationsLens Construction 17 Elements in 13 GroupsAngle of View 122° 84.1°Aperture Blades 6Minimum Aperture f22Closest Focus 28cm 16.4 MagnificationFilter Fitting Rear Gelatin Holder