ORIGINAL: mauser06
common practice in many PA deer camps is to leave rifles outside in the woodshed or similar...safe and secure of course...
just for the temp change reason..80 degree camp to 20 degrees outside your going to have issues....
even when im home i leave my rifle safely in the unheated garage when its rifle season.
No. It works the same way defroster in your car does....
The warm glass evaporates what moisture is on the glass, and doesn't attract moisture (fog) to the glass. Bringing a scope from warm to cold wont bother it, cold to warm, and you'll fog up.