I shot this back in 2011, after a small rain storm passed over the west side of Los Angeles. It was basically a group of photos of about 5 photos that were stitched together in Photoshop to make the panoramic image.
Camera used as a Nikon D7000 with a Nikkor 105mm AIS lens using manual focus. I can't remember the settings, though, and can't seem to find the original series of images to get the specifics.