Sigma has just released the Sigma 16-28mm f/2.8 DG DN Contemporary Lens for Sony and Leica L mount systems. I test the lens in Olympic NP and compare it to the Tamron 17-28 f/2.8 lens for Sony.

Support my work - Buy the Sigma 16-28 f/2.8 from B&H Photo or Amazon

Comparing Sharpness in Center and Corners Sigma 16-28 f/2.8 vs Tamron 17-28 f/2.8

Photos Captured with Sony a1 and Sigma 16-28 f/2.8