Sigma 18-200mm F/3.5-6.3 OS (Color overrun all over with blur hazy overall)
Sigma 28-70mm F/2.8 (In A mode F/2.8, the Nikon D90 was still told to release at 1/400s!)
Sigma 30mm F/1.4 (Strong chromatic abbreviations seen all over)
OK. The test results are out. You be the judge. In all, I have tested three unique Sigma lens this morning and the results should speak for itself. Each shot is taken with identical AF mode, exposure etc. with a small variance due to the different aperture sizes of each lens.
For reviewers, all images are cropped to 100%. Is this conclusive enough? Maybe, a third review may miraculously differ? I don't think so.