David St. John with 3-D printer

David St. John, a doctoral candidate in Penn State's College of Engineering, working with a 3-D printer constructed by engineering students. The printers can create 3-D solid objects from digital models.

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Taken on April 23, 2013
  • 24.0-70.0 mm f/2.8
  • ƒ/3.5
  • 24.0 mm
  • 1/500
  • 3200
  • Flash (off, did not fire)
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