S61-E-016 (6 Dec 1993) --- Astronaut Jeffrey A. Hoffman (frame center) remains secured by his feet on the end of Endeavour's robot arm as he prepares to participate in the replacement of Hubble Space Telescope's Wide Field/Planetary Camera (WF/PC). Astronaut F. Story Musgrave (just in frame at lower left corner) assists Hoffman in removing the new camera (WFPC-II) from the Scientific Instrument Protective Enclosure (SIPE). Electronic still photography is a relatively new technology which provides the means for a handheld camera to electronically capture and digitize an image with resolution approaching film quality. The electronic still camera has flown as an experiment on several other shuttle missions.