A couple weeks ago I reviewed the outstanding Sigma 35mm f/1.4 lens and could not speak highly enough about its merits. In the week that followed, every single camera review site that I have read seemed to come to the same conclusion. Recently, Dx0 Mark also rated the Sigma lens, and said it was "one of the sharpest lenses, mounted on Canon, ever measured by DxOMark website."
DxO Mark: "The Sigma 35mm F1.4 scored 17 P-MPix for sharpness and an overall DxOMark score of 30.3 putting it at the top of both of these rankings for a 35mm lens. Taken individually, among the 35mm lenses available for Canon virtually all measures, show the Sigma as the equal or better of the group, its score positions it as one of the sharpest lenses tested by DxOMark on Canon mount."
This is rare, but I am in total agreement with DxO. That feeling seems to be a general consensus when it comes to this lens. If you need a 35mm lens, the Sigma is the best you can get.
[Via DxO Mark]