K-5; What's the coldest weather and the pictures that go along with it....

I'm curious. What's the coldest weather and the pictures that go along it that you may have used a Pentax K-5. What lense too?

These were shot with my K-5 and my Pentax 16-50 f2.8. I also brought along my Pentax 12-24 f4, but didn't want to risk anything getting on the opptics or inside the camera during the exchange. The winds were just to violent to risk such a feat for a little wider angle of view in a single shot. I'd say the wind-chill was about (-10) to (-15) deg F in some of these areas along this adventure where the winds were gusting to 60+mph.

http://hikenhi.smugmug.com/Davids-Hiking-and/Big-Pine-Lakes-Winter-Route/20964397_PCCT4k# !i=1665836876&k=HVVJ8fD