Sigma 24-35mm f/2 DG HSM Art full frame lens

introduction

24-35mm wide angle full frame AF zoom lens in various mounts
announced in late 2015 as the 1st constant f/2.0 full frame zoom lens
similar sharpness to the 24mm and 35mm f/1.4 Sigma prime lenses but weighs nearly 1kg

24-35mm wide angle full frame AF zoom lens
no weather sealing at the lens-mount
18 elements arranged in 13 groups, with one FLD type low-dispersion element, seven SLD (ED type) elements, two of which are aspherical to reduce lateral chromatic aberration, field curvature, and spherical aberration, and a third, large-diameter aspherical element to minimize distortion
close focus 0.28m
82mm filter thread
87.6 x 122.7mm (3.4 x 4.8”)
941g (33.2 oz)
$US999

http://www.the-digital-picture.com/Reviews/Sigma-24-35mm-f-2-DG-HSM-Art-Lens.aspx
https://www.dxomark.com/Reviews/Sigma-24-35mm-F2-DG-HSM-Art-Nikon-mount-review-Performance-redefined
- very good sharpness, best at 24mm f/2 - the best ranked zoom lens tested
- T2.2
- 0.4% distortion
- 2.1EV vignetting
https://www.cameralabs.com/sigma-24-35mm-f2-dg-hsm-art-review/
- surprisingly as sharp as the Sigma 24mm and 34mm f/1.4 ART primes and even surpasses the optical performance of both in the APS-C/DX-corner lagging a bit only in the FF/FX-corner at 35mm
- quite a smooth Bokeh and relatively little longitudinal CA and moderate coma at f2.0
- AF needed fine-tuning in Sigma’s USB-dock
https://www.ephotozine.com/article/sigma-24-35mm-f-2-dg-hsm---a-lens-review-27974
https://petapixel.com/2015/07/21/review-sigmas-24-35mm-f2-art-is-like-a-prime-lens-that-zooms/