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Sigma 10-20mm f/3.5 EX DC HSM review

A real go-faster wide-angle lens

Our Verdict

For

  • Super fast lens
  • Good build quality
  • Good accessories

Against

  • Noisy motor

Sigma's original 10-20mm f/4-5.6 ticked pretty much all the right boxes, and rapidly became a top seller for users of Canon, Nikon, Olympus, Pentax, Sigma and Sony bodies alike.

There was a lot to love, from Sigma's fast and ultra-quiet HSM (hypersonic motor) autofocus with full-time manual override, to solid build and impressive image quality. To top this, the lens came at a knockdown price that put a few own-brand lenses to shame.

The Sigma 10-20mm f/3.5 EX DC HSM is Sigma's new version of the already popular lens and it goes further still, with a major redesign that ushers in a constant maximum aperture of f/3.5 throughout the zoom range, making it one the fastest lenses on the market.

For the first few months after launch, the advancements came at a high price to buyers, with the street price being about £210 more than the older version.

But it's since dropped dramatically, and the price difference is now only £50.

Quality counts

Internally, the lens is quite different to the older model, featuring an extra element in one of its groups, and four aspherical, one SLD (special low dispersion) and two ELD (extraordinary low dispersion) elements.

Considering the Sigma is one of the cheapest lenses of its type, it's very well built, with a high-quality feel, impeccable finish and some neat touches, including the distance scale being positioned beneath a viewing window.

As usual, Sigma doesn't skimp on accessories either, and the lens is supplied with a plush, padded soft case, along with a quality petal-shaped hood.

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Tech Specs

Product TypeLens
Maximum Focal Length20 mm
Minimum Focal Length10 mm
Maximum Aperture Wide3.5
Brand NameSigma
Filter Attachment Diameter82 mm
Lens TypeSuper Wide Angle Zoom
Magnification0.15x
Application/UsageCamera
Depth88.2 mm
Compatibility

Canon Digital SLR Cameras

ManufacturerSigma Corporation
Product Model202954
Product Name10-20mm F3.5 EX DC HSM Super Wide Angle Zoom Lens
Manufacturer Part Number202954
Manufacturer Website Addresshttp://www.sigma-imaging-uk.com
Marketing Information

With its wide angle view from 102.4 degrees it can produce striking images with exaggerated perspective. The maximum aperture of F3.5 is ideal for indoor shooting and it enables photographers to emphasize the subject.

Weight (Approximate)520 g