New Space Walk Camera
NASA worked with Nikon to have the commercial F5 cameras modified for use in space. The only necessary modification was a lubrication change out. The thermal range that the cameras are expected to encounter during a spacewalk is between -50º C and 110º C. The lubrication was selected due to better performance during these temperature extremes.
the thermal analysis team worked to ensure that the camera would be
kept within its thermal range, there is still a chance that the camera
will reach a cold temperature beyond its limits. If this occurs the
astronauts will not be able to take a picture until the camera is back
within its thermal range. To prevent this from occurring it was determined
that a "one hour flaps open flight rule" should be established.