Sigma has today announced a new constant aperture wide angle zoom lens, the 24-60 mm F2.8 EX DG. This lens is designed to be compact but also 'fast' (large, constant maximum aperture) and to provide a usable zoom range for digital SLR users, on a Nikon digital SLR this lens would have an equivalent field of view of a 36 - 90 mm, on a Canon 1.6x digital SLR (10D, 300D / Digital Rebel, etc.) of 38 - 96 mm.