Tunkhannock Viaduct, Nicholson, PA, 23 July 2005. http://www.railpictures.net/viewphoto.php?id=113331 Canon 20D and 17-40mm lens, 1/160 second exposure, f8.0, ISO 100, with B+W circular polarizer. Copyright Dave Kerr, 2005. http://www.railpictures.net/showphotos.php?userid=920
Photo copyright Dave Kerr.