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

Product Summary


The Sigma 10-20mm f/3.5 EX DC HSM is designed for the purpose of smaller APS-C sized sensor based DSLRs and is a great lens for the purpose of an ultra-wide perspective for photographers shooting architecture and landscape. The lens can also be used for the purpose of group shots in wedding and or shooting close-up photography (because of its close focusing distance).

The lens produces a wide angle of view of 102.4º- 63.8° and is one of the largest in the APS-C DSLR market. A constant fast aperture of f/3.5 is slightly better than that of the 10-20mm F4-5.6 EX DC HSM also from Sigma and ensures that both low light performance and bokeh are that much better.

Sigma has incorporated two Super-Low Dispersion (SLD) glass elements and two Extraordinary-Low Dispersion (ELD) glass elements to almost stamp out color fringing at all aperture and focal lengths. On top of these there are four spherical lenses to correct spherical aberrations. Overall the lens has 13 elements arranged in 10 groups. Sigma has ensured that super multi layer coating has been provided which takes care of the ghosting and flare.

The lens can also be used for close-up photography with a minimum focusing distance of just 9.4” and a magnification ratio of 1:6.6. Sigma’s HSM (Hyper-sonic Motor) technology ensures that the lens is ultra-quiet when focusing. The diaphragm blade is designed with 7 blades and it stops down all the way to f/22. The external dimensions of the lens are 3.4 x 3.5” and it weighs 520 grams. The lens takes a filter of size 82mm. Available at Amazon | Adorama | B&H

Sample Images by Sigma 10-20mm f/3.5 EX DC on Flickr

Product Images

Sigma 10-20mm f/3.5 EX DC Lens Specifications

Lens Construction 13 Elements in 10 Groups
Angle of view 102.4°- 63.8°
F stop range Minimum Aperture :F22
Closest Focusing Distance 24cm (9.4″)
Max Magnification 1:6.6
Filter Size 82mm
Dimensions (L x D) 87.3mm (3.4″)X 88.2mm (3.5″)
Wt 18.3 oz / 520 gr


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Purchase options

Sigma 10-20mm f/3.5 EX DC available at Amazon | Adorama | B&H