Sigma 10-20mm f/4-5.6 EX DC HSM Lens

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77% Tried & Tested
Optically the lens is a solid if not outstanding performer, build quality is up to Sigma's usual standards, and the focusing is indeed fast, silent and accurate.”

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Key Features

  • 10-20mm focal length
  • 15-30mm equivalent focal length on APS-C cameras, 20-40mm equivalent focal length on Four Thirds / Micro Four Thirds cameras, 16-32mm equivalent focal length on Canon APS-C cameras
  • F4-5.6 maximum aperture; F22-32 minimum
  • Ring-type ultrasonic-type AF motor with full-time manual focusing
  • 77mm filters
  • 0.24m/9.45" minimum focus
  • Available in Canon EF, Four Thirds, Pentax KAF, Sony Alpha, Sigma SA, Nikon F (DX) mounts

Product Description

The 10-20mm F4-5.6 is the cheaper of two Sigma lenses covering the ultra-wide angle range for APS-C SLRs (the other offers an F3.5 constant maximum aperture). It’s a solidly-made lens with fast, silent autofocus, and available in versions to fit every SLR on the market. It’s probably better suited to landscape work than architecture, due to fairly strong barrel distortion at wide angle.


Principal specifications
Lens type Zoom lens
Max Format size APS-C / DX
Focal length 10–20 mm
Image stabilisation No
Lens mount Canon EF, Nikon F (DX), Pentax KAF, Pentax KAF3, Sigma SA Bayonet, Sony/Minolta Alpha DT
Maximum aperture F4.0 - F5.6
Minimum aperture F22.0 - F32.0
Aperture ring No
Number of diaphragm blades 6
Aperture notes rounded blades
Elements 14
Groups 10
Special elements / coatings 3 SLD glass elements 2 hybrid aspherical elements 1 glass mold aspherical element
Minimum focus 0.24 m (9.45)
Maximum magnification 0.15×
Autofocus Yes
Motor type Ring-type ultrasonic
Full time manual Yes
Focus method Internal
Distance scale Yes
DoF scale Yes
Weight 470 g (1.04 lb)
Diameter 84 mm (3.29)
Length 81 mm (3.19)
Materials metal mount
Colour Black
Zoom method Rotary (extending)
Filter thread 77 mm
Filter notes does not rotate on focus
Hood supplied Yes


DPReview Conclusion

Scoring is relative only to the other lenses in the same category at the time of review.

Score Breakdown
Poor Excellent
Build Quality
Ergonomics and Handling
Image Quality
Tried & Tested
Tried & Tested
77 %
Overall Score

Overall the Sigma 10-20mm F4-5.6 EX DC HSM is a solid, well-built lens with good operational characteristics, which justifies its popularity with generally decent imaging results. While its long-running, unique selling point of being the only third-party 10mm zoom has now disappeared, and it faces strong competition from Tamron's 10-24mm, the different characteristics of the two lenses means it's still a good option for APS-C users looking for the widest of ultra-wideangle zooms.

Good For

Cropped sensor shooters looking for an affordable, well-built super wide-angle zoom lens.

Not So Good For

People who are picky about barrel distortion, or shoot in a lot of low-light environments.

User Reviews

4.33333 out of 5 stars
  • mr vigo, Jan 6, 2013 GMT:
    Great-sharp-quite-nice price

    acteally its my amazing lense i found it most great lense than canon its a nice price & perfect lense & beauty color altogh its from big company in lense made the lense is the 2d place after Tokina

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  • Jose Rocha, Nov 23, 2011 GMT:
    My quick review

    This lens could be better for the price I paid at the time (€510). I like this lens a lot for the professional feel, colors and of cours the wide angle. Optically my copy has a flaw and unfortunately I noticed it too late. Pros: - Good (not great) sharpness at most of the frame. My copy is decentered and doesn't give justice to it, but the sharpest side of the frame is good at f/5.6. I normally use it at f/8 or f/11 and the sharpness improves significally. - Like my Nikkor 35mm f/1.8, this ...

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  • fastHID, Nov 4, 2011 GMT:
    a great wide angle zoom

    After reading plenty of reviews, I bought this lens for HDR landscape photos on my Canon 60D and it indeed is a fine lens. Feels very solid, autofocus is very fast, zoom is smooth, manual focus very smooth too. Have done some great interior shots, minimal distortion and only on the wide end. Great lens for the money too. No regrets. After months of outdoors use, no dust at all internally. Fits the body well too. Problems: none.

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  • whyukon, Aug 13, 2011 GMT:
    A top pick

    I carefully researched and read all the reviews of available super-wide zooms before settling on this one. There is a lot of choice now, and each lens seems to have its own strengths and weaknesses. However, in my opinion, this lens is still a standout. The construction quality of this lens is far beyond what one would expect for a lens of this price. It feels incredibly solid, like the high-quality prime lenses of many years ago. Both the zoom and the focusing ring are very ...

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Warranty Information

"Beginning July 1, 2013, all brand new Sigma Products purchased from authorized Sigma dealers are covered under the 1 year America warranty (North and South America) and U.S.A. extended warranties for a period of three (3) years against defects in manufacturing and workmanship only. Your warranty period begins the day you purchase your Sigma camera, lens and/or flash and runs for a total period of four years from that date (please refer to the warranty policy included with your product)."

Go to Sigma's warranty registration page for more information and to register your Sigma product. DPReview GearShop is an authorized Sigma dealer in the United States.

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