The Sigma 24-105mm f/4 DG HSM A1 is a normal range zoom designed for full-frame Sony DSLRs. Key features include:

All-Purpose Zoom Range. The 24-105mm focal length covers most needed focal length short of long telephoto. It’s great as a walk-around or vacation lens.

High Build and Image Quality: As a member of Sigma’s Art lens line, it goes through Sigma’s rigorous A1 testing, ensuring high image quality. Optically, three aspherical, two SLD and two FLD glass elements are used to minimize distortion, field curvature and aberrations throughout the zoom range, with Super Multi-Layer coatings for eliminating lens flare and ghosting. The barrel is made of a lightweight TSC compound that gives the lens a solid, sturdy feel. The HSM focusing motor provides fast, silent performance for both still and video shooting.

Dock Compatible. As part of Sigma’s Global Vision series, this lens is compatible with the Sigma USB Dock for Sony A-mount Lenses (separate rental item), allowing you to adjust certain parameters through the Sigma Optimization Pro software.