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

When people ask for recommendations on a super-wide-angle lens, they're often trying to decide between the Tokina 11-16 f/2.8 and the Sigma 10-20mm f/3.5. I tested these two lenses side by side last year and decided on the Sigma 10-20mm for several reasons: 1. Extra range 2.

Yes, I would recommend this to a friend

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

Heavy

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

Nice lens which is sharp and is useful for DX format cameras. I would recommend this lens as a 3rd party option to your camera.

I also bought the Nikon AF-P DX NIKKOR 10-20mm f/4.5-5.6G VR to compare, which runs roughly $100 cheaper. These are both ultra wides. For the money, I found the Sigma superior in quality w/ metal connectors, sturdy body, quality glass and less plastic overall.

This lens is more than I ever expected. The focal lengths are perfect for property photos and a fast lens correction in Lightroom puts everything into place. I love the fixed 3.5 and the 10mm. I have no problems with the SB800 flash providing enough light and coverage.

Consistent Output; Fast / accurate auto-focus; Lightweight

"I love this lens! I recently purchased and used it with my Nikon D5100, and I was awestruck by the results. I'm going to now begin with the comment(s) most people look for: ****** CONS ******.

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.

My first experience with a wide angle lens! Whilst this lens in comparison to a standard zoom affords additional coverage, there are unfortunately, a couple of negatives. At its widest angle there is noticeable fringing / chromatic aberration towards the edges of the image which in most cases can be...

Easy to use; Build quality

Bulky