The Sigma 14-24mm f/2.8 DG DN Art gets tested and reviewed in this video by Dustin Abbott. He gives his us a in-depth first look at the new Sigma 14-24mm F2.8 DN ART lens for Sony FE along with some comparisons between it and the Tamron 17-28mm F2.8.
The Sigma 14-24mm f/2.8 DG DN Art was built for full-frame Sony E-mount mirrorless cameras, this wide-angle zoom is designed to create excellent image quality while optimizing size and weight. It can also be used for APS-C models where it provides a 21-36mm equivalent focal length range.
The lens has a Super Multi-Layer Coating combined with a Nano Porous Coating. This has been adhered to lens elements in order to cut down lens flare and ghosting to a greater extent than standard anti-reflective coatings. When combined these coatings produce high contrast and color-neutral imagery, and help to make the lens perform much better in backlit situations.
Sigma 14-24mm f/2.8 DG DN Art Specs:
Lens construction 18 elements in 13 groups
Angle of view (35mm) 114.2-84.1°
Number of diaphragm blade 11 (Rounded diaphragm)
Minimum aperture F22
Minimum focusing distance 28cm / 11in.
Maximum magnification ratio 1:7.3
Dimensions:
(diameter x length) φ85.0mm×131.0mm /
φ3.3in. × 5.2in.
Weight 795g / 28.0oz.
You can find the Sigma 14-24mm here and the Tamron 17-28mm here.