The new Sigma 8-16mm f/4.5-5.6 Lens (which is also available for Sony Alpha mount) has been reviewed on photozone (using the canon version). The verdict: “The Sigma may be the new star in this lens segment“. Compare the Sigma lens with the Sony 11-18mm f/4.5-5.6 DT (on photozone). I would say the Sigma lens is much better and costs less than the Sony 11-18mm lens! Probably this could become your favorite wide angle zoom :)