"There is no sharper ultrawide lens for APS-C cameras, and it's much better than Canon's 10-year-old EF-S 10-22mm that costs over twice as much! The 10-18mm is the best Canon ultrawide I've used. It's the sharpest, smallest, lightest and least expensive. . . . This lens has no competition. Every other ultrawide lens for Canon's APS-C cameras is optically inferior, can't focus as close, has no IS, and costs at least twice as much."〔

"At appreciably less cost than the EF-S 10-22, the 10-18mm surprised me with its build quality and optical performance. The image stabilisation adds to its general purpose usefulness and partly makes up for its relatively restricted aperture.... Distortions are well under control, and when suitable correction profiles arrive, the lens will be more than adequate for serious use if you were looking to photograph property for example..."