March 3rd, 2009 by 
aquadog
Sigma announced the new super-wide angle lens, the Sigma 10-20mm f/3.5 EX DC HSM. It has a wide angle view from 102.4 degrees and a maximum aperture of F3.5.
The lens features Two ELD (Extraordinary Low Dispersion) glass elements, a SLD (Special Low Dispersion) glass element, Super Multi-Layer coating to reduce flare and ghosting, HSM (Hyper-Sonic Motor), a minimum focusing distance of 9.4 inches (24cm) throughout the entire zoom range and a maximum magnification ratio of 1:6.6.
Sigma 10-20mm f/3.5 EX DC HSM Press Release
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