Been experiencing a cold spell with siberian temps. -30C for 3 weeks, but camera still clicking. Frankly, the vertical releasebutton has stopped working, but the rest is doing allright. I hope Canon will fix it as a warrantyissue, but their manual says camera is not guaranteed woking below 0C. In Scandinavia, that means the camera only works during summertime, I told them and they took my point. 1Dmk4 costs $$$$ so expectations are that it works under all circumstances. Never the less, got some great shoots while waiting in the cold.

