You may have visited the Giant Camera out by the Cliff House for your pinhole camera fix, but this time take a Bus Obscura around the city to get a peek through a pinhole on Sunday. Apparently it's Worldwide Pinhole Photography day that day, and this is RayKo Photo Center's way of celebrating.
They say on their website, "The Bus Obscura is a passenger bus converted to a multiple aperture camera obscura using a rear projection technique that allows the individual images to flow into one another. As the bus moves down the street a 360 degree animated panorama is created inside."
Sounds like it's worth a ride!