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Sigma 24-70mm f/2.8 EX DG Macro announced - Large aperture standard zoom lens for Digital and 35mm SLRs
Two SLD elements, one Glass Mold Aspherical plus two Hybrid Aspherical lenses provide excellent correction of various aberrations and a high level of optical performance. The lens has a minimum focusing distance of 40cm (15.7 inches) at all focal lengths and is capable of macro photography with a maximum magnification ratio of 1:3.8. It also incorporates a Dual Focus (DF) system that is designed to make the lens easy to hold during autofocusing, and yet provides a large focus ring for easy manual focusing. Since the front of the lens does not rotate, a Petal-type hood and circular polarizing filters can be easily used.
Focal Length: 24-70mm
Minimum Aperture: F32
Lens Construction: 14 Elements in 13Groups
Angle of View: 84.1 °-34.3°
Number of Diaphragm Blades: 9pcs
Minimum Focusing Distance: 40cm (15.7in.)
Maximum Magnification: 1:3.8
Filter Size: 82mm
Lens Hood: Petal-type hood
Dimensions: Diameter 88.7mm (3.5in.)X 115.5Length mm (4.5in.)
Mounts (AF): Sigma, Canon, Nikon D, Pentax and Minolta D.