The lens has a focal range equivalent to 27mm - 52.5mm in a 35mm format and it can cover the angles of view of multiple fixed focal length lenses. This wide aperture, standard zoom lens enables the photographer to expand creative possibilities on any occasion.

Credit must be given to Sigma for taking the plunge and being the first to pull off this optical feat. Despite being a touch heavy – especially for a lens intended for smaller APS-C format D-SLRs – the 18-35mm impressed us in almost all areas of testing.

I bought this recently and what a great buy it was! I do low light shots at music venues and needed a good, reliable wide angle zoom that could do it. This lens is now my main kit for gig photography. It's great in low light and very sharp.

Great low light lens. Photo was taken with a Nikon D7100

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The Sigma 18-35mm F1.8 DC HSM is an extraordinary lens, offering prime-level image quality in the fastest zoom ever made for SLRs. Its 28-50mm equivalent range is a little limiting though, and inconsistent autofocus means that it can be difficult to make the most of the excellent optics when shooting at large apertures.

Enthusiast APS-C users looking for the very best image quality available from a normal zoom, and willing to spend a bit of time setting up autofocus micro-adjustments or using live view focusing for the sharpest results.;

Photographers who like to travel light, or need a wide-ranging zoom;

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. Or you can opt for a prime lens with a wide aperture, but it doesn't support zooming. Sigma aims to change that with this lens. It's impressively sharp, but it is a bit large compared with slower zooms or fast prime lenses, and its zoom range is modest at 1.9x. It stills earns high marks and our Editors' Choice award; the lens is an accomplishment, and the fact that it doesn't come with a sky-high price tag means that more photographers will actually be able to shoot with it. The lens is currently available to order in Sigma, Nikon, and Canon mounts, but Sigma also plans on offering it for Pentax and Sony/Minolta cameras. It isn't compatible with full-frame bodies; the image circle only covers an APS...

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.

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

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

Sigma 18-35mm F1.8 DC HSM is a Fixed aperture Auto Focus (AF) Standard Zoom lens with APS-C / DX max sensor coverage, and it is designed to be used with F(DX) Mount cameras. What type of photography is the Sigma 18-35mm F1.8 DC HSM lens good for?

Autofocus, Distance Scale, Hood supplied, Full-time Manual Focusing, Internal Focusing, Fast Aperture at Wide end, Fast Aperture at Tele end, Constant f1.8 aperture throughout the range, 9 Diaphragm Blades for Smooth Bokeh, Minimum focus distance of, 0.28m / 11.0 inch, No Weather Sealing

Autofocus, Distance Scale, Hood supplied, Full-time Manual Focusing, Internal Focusing, Fast Aperture at Wide end, Fast Aperture at Tele end, Constant f1.8 aperture throughout the range, 9 Diaphragm Blades for Smooth Bokeh, Minimum focus distance of, 0.28m / 11.0 inch, No Weather Sealing

In the past, when I was working in a photo store, the aversion towards other than original lenses (especially Sigma) was really overwhelming. A common malady of these lenses was that the same lens types differed from piece to piece and sometimes fell apart after half year of usage.

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...