WI,
I don't have first hand experience yet with below zero temps. The manufacturer rates them to -30F and so far all there claims have been met or exceeded. I believe the cam will perform flawlessly in subzero temps. Battery life will be negatively impacted, but thats just batteries, not a fault of the camera. I've seen batteries in other cams cut in half usually and as much as 75%. Thats another reason to buy a ScoutGuard or Covert. The battery life is beyond great so when it gets frigid you'll still get decent battery life.