Some of these images were shot some years ago in 35MM half-frame stereo using a TDC or Stereo Realist camera. The newer ones, of considerably less resolution, were made using the iPhone app i3DSteroid. If you don't know how to view stereoscopic images in 3D, this website may be of use: http://www.stereoscopicsociety.org.uk/WordPress/resources-2/viewing-stereoscopic-images/
