DxOMark published their test results for the Tamron SP 24-70mm f/2.8 DI VC USD lens for Nikon mount. According to the DxOMark test results Tamron SP 24-70mm f/2.8 performed better then the Nikon 24-70mm f/2.8G.
DxOMark tested the new Tamron SP 24-70mm f/2.8 DI VC USD lens for Nikon. Tamron SP 24-70mm f/2.8 standart zoom lens for Nikon ranks best for image quality on professional standard zooms and got a DxOMark overall score of 29.
Nikon D800 is used for the tests and Tamron pushed the Nikon 24-70mm f/2.8G into second place as the Nikon lens had a score of 28. The Sigma 24-70mm f/2.8 IF EX DG HSM lens also compared and got a score of 23.
Tamron SP 24-70mm f/2.8 Performed Better Then Nikon 24-70mm f/2.8G
From DxOMark Conclusion :
The Tamron offers better sharpness overall, scoring 17 P-Mpix, compared to 15 P-Mpix for the Nikon, good performance at f/2.8 and boasts significantly better chromatic aberration results, too.
What’s more with a $1299 price tag it’s a whooping $600 cheaper than the own brand alternative making it superb value for money for Nikon shooters.