The upcoming Tokina AT-X 11-20mm f/2.8 PRO DX lens went up for pre-order today at a $599 retail price. It should start shipping on March 2, 2015 for both Canon and Nikon mounts.
This is an APS-C format lens, which results in about a 17.5-32mm full frame equivalent field of view. It has a nine-blade diaphragm and internal focusing. Check it out here at B&H Photo.