Camera Warm Although thickened lubricants may cause a cold camera to malfunction, most problems in the cold arise from insufficient battery power.
Batteries supply power to the exposure meter, winder motor, flash, and so on.
The cold saps power from the batteries, which sometimes causes the camera to malfunction. So keep the batteries warm by keeping the camera warm inside your coat. Incidentally, if you carry your camera under your coat, you may not need a case which can be an annoyance when you are trying to get a hurried picture. Keeping the camera warm is especially important with automatic cameras and video cameras that depend heavily on battery power. For example, if the batteries in a video camera are cold, the videotape may not advance at the proper speed.