Sigma 210101 18-35mm F1.8 DC HSM Lens for Canon - Black

Product Information

All in all this lens is at the top of the heap for optical performance in a crop sensor lens. AF Concerns For wildlife photographers who need additional reach, or photographers who only publish images online, 18 megapixels may be enough. But for me, 18 megapixels is a big drop in resolution, so I would not use the Sigma 18-35mm f/1.8 for my own still photography.

Need the speed? Sigma 18-35mm F1.8 DC HSM in-depth review Need the speed? Sigma 18-35mm F1.8 DC HSM in-depth review

AI servo was better, but still the occasional miss, though I think the error was perceptibly smaller. (Maybe +/- 1 micro?)

Distortion

And that's really the key to understanding the impression that I got: that it is what it isn't. And that it is what it is. Bear with me on this. It is what it isn't.

Sigma 18-35mm f/1.8 DC HSM ART Review - DustinAbbott.net Sigma 18-35mm f/1.8 DC HSM ART Review - DustinAbbott.net

Our final comparison, ironically, has the new Sigma up against the firm’s new 35mm f/1.4 DG HSM A, the best performing full-frame 35mm lens in our database. Although it’s easier to make a high-speed 35mm than either a 24mm f/1.4 or a 18mm f/3.5, the Sigma 35mm is without doubt a superb performer optically and yet the new Sigma 18-35mm zoom comfortably achieves a higher DxOMark Score. The new zoom also has slightly higher levels of sharpness and has the edge in uniformity. Less important perhaps is the superior transmission score, while the differences between distortion, vignetting and chromatic aberration are practically negligible. In this set of evaluations, we’ve compared the Sigma zoom with the highest performing full-frame primes of the same focal lengths – 18mm, 24mm and 35mm. While it might seem a little unusual, the lenses (all high speed models) reflect the state of the art in that format and when mounted on an APS-C DSLR offer the same angle of view (at each focal length) as the Sigma. Maybe the secret is in the use of this lens on the M4/3 mount. With a couple of electronic EF to M4/3 adapters you can have a FF fov equivalent 36-70mm f1.8 and a focal reduced (near aps-c) 26-50mm f1.2 FF fov equivalent as well.

With the introduction of this model, Sigma has the best performing zoom of its type. The DxOMark score of 25 points puts well ahead of both the full-frame Canon EF 24-70mm f/2.8 L II USM and the Tamron SP 24-70mm f/2.8 Di VC USD (though bear in mind those lenses become the equivalent to a 38-112mm on a Canon APS-C body).