Here are two additional images using Batis 18mm from the Walt Disney Concert Hall in Los Angeles. Just FYI, the reddish tint of one side of the structure in the first image is reflection off the ticket booth right underneath.
3 from Europe, one from Flea for All in Asheville, NC. Was thinking about the 18, but I also have Nikon. Might get the Nikon 20 + Vello adapter to use it on my A7R2 and D4s. 20-24. OK separation, but not as interesting as 18-24.
There are some wonderful images in this thread - outstanding artistic and technical talent.