The Sony 24-70mm has an average review score of 85.3%

Score (%):
Sony Vario-Sonnar 24-70mm f/2.8 ZA T* SSM lens review
What Digital Camera reviews the Vario-Sonnar 24-70mm f/2.8 ZA T* SSM lens on Sony a900...
Read the full review...

92

Zeiss Vario-Sonnar T* 24-70mm f/2.8 ZA SSM (Sony SAL-2470Z)
The Zeiss Vario-Sonnar T* 24-70mm f/2.8 ZA SSM produced outstanding performance figures in our APS-C test but it's not quite as good when used within its native full format scope. It is, of course, still able of delivering an outstanding center resolution but the corner quality disappoints at 24mm when using large to medium aperture settings.
Read the full review...

67

Sony 24-70mm f/2.8 ZA Carl Zeiss Vario Sonnar T* SAL-2470Z
Excellent sharpness overall but corners can be sometimes problematic due to field curvature. Curiously there is very little to no curvature beyond 35mm FL. An excellent standard zoom.
Read the full review...

97