Picturing abandoned places (buildings,churches,villa's,castles,...) is my main photography
In past I tested the 16-35 I & II, 17-40 f4L, Tokina 16-28 2.8, Tokina 17 3.5 ATX-Pro
The last one was the best one (only €350 for that old Tokina 17 3.5 out of production), light, compact, sharp, cheap, no flare, accepts filters. It was corner-corner sharp from +-f11-f13. Even if I sold it, I recommend this one to anyone who is looking for a great budget UWA! You can buy it only on Ebay and when you sell it, it takes some weeks as Tokina is pity enough not so popular brand (unjust!!!).
Everyone is so positive about the new Canon 16-35 f4L, so i'm really curious.
Here I just read it's corner-corner sharp from f8 or even f4!
I use it on tripod for hdr's, so i'll save a lot of waiting time with my f11/f13 before comparing to the f4-f8 now.
We visit these abandoned places in a planned roadtrip is time limited to fulfill the scheme (and not to be the last of the crew ), so time is important.
I wonder how this lens will perform for nightclub photography (sold my Sigma 15 2.8 fisheye as the usuage was too limited).
Now it's f4 + IS vs f2.8 (but I use external flash at 1/20-1/30 anyway for some nice lighttrails)