Image quality, vignetting, and distortion test results, along with specs, measurements, and standard and varied product images, are now available on the Sigma 24-70mm F2.8 DG DN II Art Lens page.
As I just said in the press release, this lens's predecessor, the Sigma 24-70mm f/2.8 DG DN Art Lens, is less than 4 years old and, remarkably, the #1 best seller at B&H — out of 1,782 mirrorless lenses.
Here are some image quality comparisons.
Compared to the Sigma 24-70mm f/2.8 DG DN Art Lens
Compared to the Sony FE 24-70mm F2.8 GM II Lens
Compared to the Sigma 28-70mm F2.8 DG DN Contemporary Lens
Compared to the Tamron 28-75mm f/2.8 Di III VXD G2 Lens
Compared to the Canon RF 24-70mm F2.8 L IS USM Lens
Many more image quality comparisons are available — create your own using the site's tools.
From a measurements and specifications perspective, here is the Sigma 24-70mm F2.8 DG DN II compared to the 24-70mm f/2.8 DG DN Art Lens. Here is the visual comparison (the version II lens is to the left):
Here is the rotated and extended with hoods version:
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