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The Sigma 18-35mm ƒ/1.8 DC HSM "Art" lens packs a big punch in features and image quality without a big punch to the wallet. Shockingly sharp images at all apertures, even at ƒ/1.8, with excellent flatness of field and good control over chromatic aberration, distortion and vignetting make this lens...

Gary Wolstenholme reviews the Sigma 18-35mm f/1.8 DC HSM A standard zoom lens.

Excellent sharpness; Constant f/1.8 aperture; Low falloff for an f/1.8 lens; Good build quality; Reasonably priced

No real issues to report

The Sigma 18-35mm F1.8 DC HSM delivers on its promise; it boasts the speed and sharpness of a prime lens, along with the convenience of a zoom. (4.5 out of 5) Editor's Choice Pros Sharp Wide aperture Reasonable price tag Available for several camera systems Cons Big No optical stabilization Some...

Sharp; Wide aperture; Reasonable price tag; Available for several camera systems

Big; No optical stabilization; Some wide-angle barrel distortion; Modest zoom ratio

Prior to the introduction of the Sigma 18-35mm F1.8 DC HSM ($799 direct) lens shutterbugs with APS-C D-SLR cameras had to make a choice when it came to lens functionality. You can go with a zoom lens and cover a range of focal lengths, but even top-end models only opened up to f/2.8.

Sharp; Wide aperture; Reasonable price tag; Available for several camera systems

Big; No optical stabilization; Some wide-angle barrel distortion.

On paper the Sigma 18-35mm F1.8 DC HSM effectively replaces fast 28mm, 35mm and 50mm equivalent optics in your camera bag, saving space and money whilst offering the convenience of a zoom lens.

With the company's ground-breaking and competitively priced 18-35mm f1.8 lens, you'll feel like you're shooting with a better camera.

The word "groundbreaking" seems inadequate for describing the awesomeness of the Sigma 18-35mm f/1.8 DC HSM Art Lens. The primary reason for that awesomeness is the not-seen-in-any-other-zoom-lens f/1.8 aperture.

The Sigma 18-35mm F1.8 DC HSM was announced to widespread excitement, if only for the company's sheer ambition in making such a fast zoom. But this inevitably came with a degree of scepticism - it's hard enough to make an F2.8 zoom that's really sharp wide open, so could an F1.8 zoom possibly work?

Super fast constant F1.8 maximum aperture; Excellent optics; even wide open; Fast; silent autofocus; Solid build quality without being over-heavy; Compatible with Sigma's USB dock and Optimization Pro software

Restricted zoom range; Needs detailed AF microadjustment for best results; Inconsistent autofocus in difficult conditions even after microadjustment; Physically rather large for a standard zoom

Ground-breaking f/1.8 maximum aperture wide-angle zoom for APS-C DSLRs gets a workout

f/1.8 maximum aperture; Excellent image quality; Full-time MF option; Very good sharpness

Not full-frame coverage; Somewhat weighty; Modest 2x zoom range