Sigma 10-20mm f/3.5 EX DC HSM

alaTest has collected and analyzed 17 user reviews of Sigma 10-20mm f/3.5 EX DC HSM from Amazon.com. The average user rating for this product is 4.2/5, compared to an average user rating of 4.3/5 for other products in the same category on Amazon.com.

The well-built Sigma 10-20mm f/3.5 EX DC HSM Lens, at review time, is one of only a few lenses in the ultra-wide angle APS-C lens class to have a fixed maximum aperture. While f/3.5 is not what I typically consider wide/fast, the fixed maximum aperture...

Sigma has made some dramatic improvements in this constant-aperture version of the 10-20mm lens, and has made them where they count: at the 10mm end of the focal length spectrum, where (arguably) the majority will probably use this lens.

Both Sigma lenses use the company's HyperSonic Motor (HSM) autofocus, which is practically as quiet as the equivalent Canon and Nikon systems, although it proved rather slower in our tests.

A real go-faster wide-angle lens

David Clapp takes the Panasonic GF1 and Sigma 10-20mm out in temperatures as low as -20C to put them to the test.

Sigma's update to their popular 10-20mm ultra-wide lens now offers a faster constant aperture of f/3.5 throughout the zoom range, along with a Hyper Sonic focus motor.

As we've written several times, most leading optics manufacturers have lately decided to replace or extend their offer of ultra wide angle lenses. Nikon, already having a 12-24 model, introduced a 10-24 mm. Tamron replaced a weak 11-18 mm with a much...