sigma has expanded their ever growing Global Vision line with the world's
first constant f/2 aperture on a full-frame zoom lens, the 24-35mm f/2 DG HSM
Art Lens, available here with the canon EF lens mount. The groundbreaking
aperture combined with the versatile wide-angle 24-35mm focal length allows
photographers to easily replace three common lenses, the 24mm, 28mm, and 35mm,
with one piece of gear.