I've done this scene a few times, this the first with the T/18-56. This was my second attempt to capture the wispy low clouds moving through the lights projected upward from the bridge supports - in the first attempt using the built-in 16 gb memory, the camera spontaneously deleted all of my JPEGs, but left 2 short video clips intact. I went and got an SD card pronto. So far so good. Leica T/18-56, f5.1, 3.2 seconds, ISO 200.