The following photos are from a set taken with a Pentax k10d from a high-altitude sounding balloon during an experiment conducted by Oklahoma State University while testing a new cosmic radiation detector.
According to the original poster, the k10d performed flawlessly in the harsh vacuum of space at temperatures below -60F.
“The payloads are attached to a sounding balloon which climbs to over 100,000 ft. The balloon is tracked with GPS telemetry systems. When the balloon is launched, it is about 12 ft. in diameter. At peak altitude it is between 40-50 ft. in diameter before burst (or commanded cut-down).”