Carlton SooHoo, Ph.D.: National Memorial Arch Behind the scene : how this panorama was made Like many public memorials, there are constantly tourists all about. I had only moments to set up and shoot before the arriving tourists would appear. Some tourists were nearby, but I used photoshop to make them disappear. It was also very cold and slippery and the tripod made for a good balancing third leg. I took four shots at 90 degrees each, and one shot straight upward. Exposure was: ISO 100, f/8, 1/180 sec. Raw image recorded. Return