Sigma 10-20mm f/3.5 EX DC HSM ELD SLD Aspherical Note that this is the new f3.5 version. The older version is the Sigma 10-20mm f/4-5.6 EX DC HSM.
When posting photos, please give any and all information in regards to the photo that you can. This extra information will give more information about how the photo was taken and with what camera body.
Example:
Canon 20d : @16mm : 1/200th : f3.5 : 1600 ISO : AV Mode : -1/3 Exp Comp
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Night Owl added 2 Minutes and 53 Seconds later...Double Post Merged Below
This lens and it's older sister, the f4.5-5.6, seem to be made for dog snouts.
All of these shot with the Canon 50D. EXIF should be intact.