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The Sigma 10-20mm F4-5.6 EX DC lens allows enjoyment of super wide-angle photography and it is a very powerful tool for indoor shooting and landscape photography with APS-C size image sensors of digital SLR cameras.

Wide angle of view (102.4 ° at 10mm and 63.8 ° at 20mm) offers the photographer greater freedom of expression. Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses. One piece of glass mold and two hybrid aspherical lenses, offer excellent correction for distortion, as well as all types of aberration.

It has a minimum focusing distance of 24cm (9.4») at all focal lengths. The non-rotating lens barrel perfectly suits the petal shaped lens hood. A circular polarizing filter can also be used conveniently.

Features:

• It covers a superwide angle of view 102.4° to 63.8°(SD format)
• Three pieces of Special Low Dispersion (SLD) elements and three aspherical lens elements produce top quality optical performance.
• Inner focusing system ensures the length of the lens remains unchanged whilst controlling aberrations.
• Minimum focusing distance of 24cm (9.4») at all focal lengths.
  
• Relatively compact, lightweight for an ultra wide-angle zoom lens.