I can remember when I first got my Canon 16-35mm wide angle and used it to shoot a listing for my wife. She scolded me severely and sent me back to reshoot several of the rooms where I had racked the lens out to 16mm. She said at 16mm effective the small intimate living room looked like a bowling alley. And she was right.
All you shooters that have Canon full frame DSLRs, think what you could do with this glass that goes out to 11mm! This lens gives new meaning to the term UFWA (Ultra F@#%in' Wide Angle)!
Seriously though, Canon's recently announced EF 11-24mm f/4L lens may be as good as the Nikon 14-24mm f/2.8G ED. The Nikon 14-24mm has for years been considered the best wide-angle lens available. There is a review at lens rentals.com that compares the 11-24mm to all the similar Canon glass and the 11-24mm appears to be close or better than most Canon zoom lenses. Only the Canon 24-70mm resolves better at 24mm and the 11-24 is very close.
Tim Dodd at PetaPixel has a review of the Canon 11-24mm. While this new lens the best ultra-wide-angle lens in Canon's line up. I'm not sure that if I wanted something better than my Canon 24-70mm and 16-35mm that I wouldn't rather use a TS-E 24mm f/3.5/ II to shoot interiors. I get myself in enough trouble going wide with my 16-35mm zoom! Besides the TS-E 24mm is $1300 less than the 11-24mm.
What do you think, are any Canon shooters going to add the 11-24mm to their bag for shooting interiors?