Entry-level DSLRs can generally be used in sub-zero conditions, and cold itself rarely damages the camera. Users report Canon entry-level bodies working fine down to about -20°C, but the main limitation is battery performance.

As temperatures drop, batteries lose their ability to deliver current, so the camera may stop working sooner even if it’s otherwise fine. At very low temperatures, you may get far fewer shots per battery. The practical solution is to carry multiple spare batteries and keep them warm inside your clothing, then swap them as needed.

For -10°C to -30°C, expect reduced battery life to be the biggest issue. Also think about handling: in extreme cold, you may not want to remove thick gloves, so a camera with controls you can operate while gloved is helpful.

In short: yes, these cameras will usually work in the cold, but don’t expect full battery life, and plan around that. If you’ll shoot in extreme winter conditions often, a more rugged, weather-oriented body may be easier to live with, but for occasional use the key is warm spare batteries and glove-friendly operation.