The Canon 11-24mm f/4L USM has arrived. It is quite an impressive lens in size and weight and build quality—heavier than even the Nikon 14-24mm f/2.8G by about 200 grams.
Canon seems to emphasize low distortion and excellent flare control, which is right and proper for a zoom lens in this range—too many ultra wides have horrific distortion.
In DAP, I’ve posted an overview page as well as a discussion of the Canon MTF chart.
With a lens like this, field shots are everything. I’ll be shooting it very soon in the Eastern Sierra and Death Valley area.