The Sigma 8-16mm f/4.5-5.6 DC HSM was designed for DSLR APS-C sensor cameras. This lens was great for landscape and the interiors of houses, and cars, etc. The problem I had with this lens, was all me. I never fully developed an eye for the abstract forms, new angles, and perspectives that the Sigma 8-16mm allowed me to capture. It was one of those pieces of gear that I had to have, which was rarely used. If you are one of those who have or want to develop an eye of the ultra-wide-angle photographs I do recommend the Sigma 8-16mm f4.5-5.6 DC HSM.
The following photos were taken with a Sigma 8-16mm f/4.5-5.6 DC HSM and Sony slt A65.