Originally posted by Adam The K-3 is rated to -10C, but this also requires a weather sealed lens to work as specified.
This has to be incredibly modest. -10c is barely even on the cusp of cold. I'm betting that's more of a rating for the battery as its life will die very quickly below that. I know my phone would chew through battery life when I worked in freezers a lot.
I think the biggest hazard of operating electronics in extreme cold would be potential of some components reaching dew point. This is easily avoided by not using them for prolonged periods of time.