Sigma 24-70mm f/2.8 DG OS HSM Art vs Tamron SP 24-70mm f/2.8 Di VC USD G2

Both are fast 24-70mm f/2.8 full-frame zooms with stabilization, and both are heavier and softer at the edges than the first-party lenses they undercut. The Sigma Art is the sharper, more solidly built lens and the better pick for Canon EF shooters who want image quality first. The Tamron G2 is the lighter, more weather-sealed option with faster, quieter focus and better stabilization, so it suits handheld and travel work. Owners of both report good center sharpness and reliable autofocus; neither matches a native 24-70 for edge-to-edge bite wide open.

• Choose the Sigma 24-70mm f/2.8 DG OS HSM Art if image sharpness and a tank-like build matter more to you than weight and you shoot Canon EF.
• Choose the Tamron SP 24-70mm f/2.8 Di VC USD G2 if you want a lighter stabilized standard zoom with fast, quiet autofocus for handheld and video work.