10-20mm F4-5.6 EX DC HSM lens allows enjoyment of super wide-angle photography making it a very powerful tool for indoor and landscape photography with APS-C size image sensors of digital SLR cameras. Offering an ultra-wide angle of view 102.4 - 63.8 degrees ( when used with a Sigma SD camera)

Most Appropriate Coating for Digital SLR Cameras
The new multi-layer lens coating and lens design reduce flare and ghosting, a common problem with digital cameras and also creates an optimum colour balance through the entire zoom range.

SLD and Aspherical Lens Elements
Three SLD (Special Low Dispersion) glass elements ensure ulta-high resolution and sharpness. One glass mold and two hybrid aspherical lenses offer excellent correction for distortion, as well as all types of optical and colour aberrations.

Inner Focus System
This lens incorporates an internal focusing system, which eliminates front lens rotation, allowing the use of a petal-type hood and also minimize fluctuation of aberration caused by focusing system.

HSM (Hyper Sonic Motor)
The HSM equipped models ensure a silent, high-speed AF function as well as full-time manual focusing capability for Sigma, Canon, and Nikon-D mount lenses.

Minimum focusing distance of 24cm (9.4”) at all focal lengths
This lens has a minimum focusing distance of 24cm (9.4”) throughout the entire zoom range.

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