Here's me recreating the scene from Ferris Bueller's Day Off, where they visit the Sears Tower. Now it's being renamed the Willis Tower; our architectural tour guide called it the "What you talkin' 'bout Willis Tower." BTW, couldn't see a thing, it was so cloudy. Below us.
Camera: Canon EOS 50D Lens: Canon EF 16-35mm f2.8 Light: Existing ISO: 200 Exposure: f5.6 @ 1/125 sec.