This is an excellent lens for the money. At 10mm (F3.5( it was slightly soft but after 11mm the images were very sharp (F.4 and up). The quality and feel of this lens is really nice. It is a nice fit and nice price for my 7D.

Light lens compared to my 16-35mm; nice color and decent low light performance; nice build quality

Little soft at 10mm but sharpens quickly above 11mm

I bought it for using with Nikon D300S.. quality product with reasonable price..

Easily Interchangeable; Lightweight; Strong Construction

Poor in Low Light

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.

Yes, I would recommend this to a friend

Consistent Output; Fast / accurate auto-focus; Strong Construction

Heavy

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.

Very good resolution; Good build quality; Excellent value; Low levels of Chromatic Aberrations

82mm; Stiff manual focus ring

This professional standard lens impressed our tester. Find out why by reading the Sigma 10-20mm f/3.5 EX DC HSM lens review.

Stunning performance

Slight focusing stiffness

Sigma's widest nonfisheye and fastest ultrawide zoom, the constant-aperture 10-20mm f/3.5 belongs to the EX family of sturdily built, optically gifted Sigmas. To control multiple forms of aberration, it uses three low-dispersion glass elements and four aspheric elements-the most of any Sigma.

The Sigma 10-20mm f/3.5 EX DC HSM is available with lens mounts for Sigma, Canon, Nikon, Pentax and Sony DSLRs, and provides a 15-30mm focal range. The lens features 13 elements in nine groups with one SLD (Special Low Dispersion) and two ELD (Extraordinary Low Dispersion) glass elements designed to...

The Sigma 10-20mm is always with me on my family vacations. The 20mm is perfect to capture everythin

Sharp at all F-Stops Lightweight & versatile

Vignette and fish eye effects with lens at its widest

Following in the footsteps of Sigma's full-frame 12-24mm DG zoom, the 10-20mm DC version has a lot to live up to. Fortunately, it is not only equal to the challenge but also pulls ahead in several important respects.

Good all-round performance

Nothing really