" http://www.amazon.com/gp/product/B003G20AAE?tag=httpblogtrave-20
A DC series lens designed exclusively for use with smaller chip APS-c or 43 cameras
HSM Hyper-Sonic Motor ensures a quiet high-speed auto focus
FLD glass elements with performance equal to fluorite glass for compensate for color aberration
One Aspherical lens and two glass mold elements
Produces images with exaggerated perspective with its wide angle view from 1212 Degree
Sigma 8-16mm f/4.5-5.6 DC HSM FLD AF Ultra Wide Zoom Lens for APS-C sized Canon Digital DSLR"