I hope this is the right place to ask ,. At the moment I have a 7D and the 10-22mm ,. but I'm finding I am using more and more my 5D mark III , I do have the 24-105 but I would prefer a great landscaper/seascape lens for my full frame that would be equivalent to the 10-22mm which I truly love . No limitations on price , I just want tack sharp images . Been looking around and I've been thinking about the Canon's 16-35 , Tokina ? ,.. Sigma ? or even the Nikon 14-24mm . What do you all suggest ? Thanks in advance .