This is an in-camera multiple exposure from Battery Spencer of the Golden Gate Bridge. There were five exposures overall. Each exposure was five seconds in duration. For the first three exposures I left the camera on the tripod, and panned between the exposures slightly from left to right. For the last two exposures, I took the camera off tripod and wiggled it quickly and slightly in my hands. Using the Autogain setting made sure that the five exposures were balanced, and that nothing predominated.