The Sigma 24-35mm f/2 DG HSM | A is the world’s first constant f/2 aperture on a full-frame zoom lens. This lens combines groundbreaking aperture with the versatile wide-angle 24-35mm focal length that allows photographers to easily replace three common lenses, the 24mm, 28mm, and 35mm, with one piece of gear. The Sigma 24-35mm f/2 DG HSM | A also offers exceptional control over depth-of-field with an aperture range from f/2 to 16, and when used on APS-C camera bodies it has an equivalent focal length of 38.4-56.