Image quality, vignetting, and distortion test results, along with specs and measurements are now available on the Tamron 16-30mm F/2.8 Di III VXD G2 Lens page.
The ultra-wide-angle zoom lens category is crowded, with many comparisons available. I'll get you started.
Compared to the Tamron 17-28mm f/2.8 Di III RXD Lens
Compared to the Sony FE 16-35mm F2.8 GM II Lens
Compared to the Sony FE 16-25mm F2.8 G Lens
Compared to the Sigma 16-28mm F2.8 DG DN Contemporary Lens
Compared to the Canon RF 16-28mm F2.8 IS STM Lens
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