Keywords: tbt throwbackthursday usgs mapping science camera historical history photography topographic blackandwhite monochrome black and white Jay Prendergast adjusts the lens on a Robertson 48-inch, 4.5 ton camera. Installed in 1959, the camera was used for precise scale transformation of mapping separates and composites. This photo was taken in Menlo Park, CA in 1965. Jay Prendergast adjusts the lens on a Robertson 48-inch, 4.5 ton camera. Installed in 1959, the camera was used for precise scale transformation of mapping separates and composites. This photo was taken in Menlo Park, CA in 1965. |