Sigma 35mm f1.4 DG HSM A Sony mount lens review: Ultra high performance?By Kevin Carter - Friday October 18 2013 Lens Review
Revamped six years ago, the Sony 35mm f1.4 equivalent is based on an earlier, film era Minolta design. Although the firm introduced the lens with little fan-fare, it’s thought, besides the revising of the exterior, Sony updated the glass to lead-free types and improved lens coatings.
Against the brand new Sigma the aging design of the Sony reflects in the scores. Overall, the Sigma achieves an outstanding DxOMark score and a very high score for Sharpness; 17P-Mpix vs. 11-P-Mpix for the Sony. Not only that, but the Sigma is a 1/3 Stop faster in Transmission, has +1/2 stop less vignetting at full-aperture and has superior control of chromatic aberration with digital sensors. And, as an extra incentive, the Sigma is far better value at $899, against a hefty $1,499 for the Sony.