The Sigma 24-70mm F2.8 Dg Dn Ii Art lens is here to exceed expectations in terms of optical performance and functionality, gracing the world with its unique features and professional-grade design.Enhanced Portability + HlaIt weighs nearly 10% less and is 7% smaller than its predecessor, which means this lens just keeps getting better and better. The Sigma 24-70mm f/2.8 Art lens has an aperture ring and high-speed autofocus brought to you by a redesigned Af motor (the High-response Linear Actuator or HLA), further assuring each user that they will have swift and precise focusing when using this lens.Exceptional OpticsThroughout its entire focal range, the Sigma 24-70mm f/2.8 Art lens delivers high-quality optical performance thanks to its five aspherical lenses that were strategically incorporated to minimize any optical distortion and aberrations that a lens would be susceptible to if the lens were the traditional spherical form.