The best way to deal with this is:
If your camera is at 0 degrees outside, put it in a large sip lock bag and remove as much air as possible and zip it up.
Then just bring it inside and leave it there until it has equalized to the indoor temperature. which maybe 20 degrees a couple of hours at least.
Same as for going outside, leave it in the shed for a couple of hours to get to ambient temp
Leon
