Over a years time we had the honor and privilege to work closely with NASA and Astronaut Don Pettit custom converting and modifying two Nikon digital SLR's for use on the international space station (ISS). During this prolonged testing and modification process we developed many improvements for digital SLR imaging specifically for astrophotography and survival of extreme environments including space flight. Many of the developed improvements are used in our Astro Cameras and standard Astro-Conversion services.