The addition of an image stabilizer is certain a highlight albeit it isn't quite as efficient as the variant used by Tamron. Sigma used top quality materials, it's tightly assembled as well as weather-proof. It is at least as good as on the Canon EF 24-70mm f/2.8 USM L II if not better. There is one aspect where the Sigma lens excels - build quality. The quality of the bokeh is comparatively good except in the foreground but that's usually of lesser concern. Both vignetting, as well as distortions, are typical for this lens class. Lateral CAs are on the high side, especially in the image corners, so auto-correction during post-processing is a good idea. Whether this is important in real life may be a different question but at the end of the day you are paying big bucks for having a f/2.8 lens. The border/corner performance is generally rather dismal at f/2.8 at all settings. And the outer image is certainly very decent when stopping down a bit - that's except for the very long end. That's, of course, great when it comes to taking shallow depth-of-field images where your main subject stays within that zone. Let's start with a positive aspect - throughout the zoom range it is darn sharp in the broader image center. The Sigma 24-70mm f/2.8 DG HSM ART OS promised many things. We'll have to review this one yet but based on the feedback out there it may well be the best of the non-OEM bunch.
Just like the Canon, this one comes without an image stabilizer.
#SIGMA 24 70 2.8 NIKON SAMPLE PICTURES PRO#
The underdog in this range and the most affordable option is the Tokina AF 24-70mm f/2.8 AT-X PRO FX (left). It can't match the Sigma in the image center but it has a slight advantage regarding border/corner performance. It is a solid performer but is suffering from a few shortcomings as well. We reviewed the Tamron SP 24-70mm f/2.8 Di VC USD G2 (center) just a few days back. The Canon EF 24-70mm f/2.8 USM L II is certainly the preferred lens among professionals albeit, to be honest, we were actually not all that thrilled by its performance (either) and substantially more expensive than the 3rd party offerings. You have quite a few lenses to chose from in the 24-70mm f/2.8 league.
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