Tamron 10-24mm f3.5-4.5 Di II (Canon)
The Tamron 10-24 is an ultra wide-angle zoom lens. It is meant to be used on DSLRs with a cropped sensor. With a focal range of 10-24mm this lens will give you very dramatic perspectives in your photos. This lens also features Tamron's Micro motor for smooth accurate auto focusing. This lens is available for Nikon and Canon mounts.