Depending on the intensity of frost in the chamber, it can begin to slow down the screen, and later completely stop working. The shutter can also freeze, and you will no longer be able to take pictures, but this will happen in fairly severe frosts — 20. Going into a warm room does not need to immediately get the camera from the bag, but only after 10-15 minutes. Also does not need to turn it on immediately. The fact is that with a temperature difference due to humidity, condensation is formed on the chamber parts, due to which, when turned on, there may occur. If the camera is in the bag for some time, then it may smoothly warm up and the condensate in this case will not form, or forms, but in small quantities. The cold also negatively affects the flash. Low temperatures are able to wear it, and it can begin to freeze.