Like others havesaid, all the money in the world spent on optics cant keep them from getting condensation on the outer lenses durring major temperature shifts. I have Zeiss Conquests, and Leupold VX-II's on all of my deer rifles, and they will all do the same thing if you take them into the house, or out into the cold after getting warmed up. For this reason, as others have said, its pretty common practice to leave your rifles outside (in a garage, muckroom, or even in your truck) for the course of a season. It keeps the scope from getting condensation, and more importantly, it keeps the metal from gathering condensation, which creeps everywhere and causes rust and wood warping.

Good scopes are fantastic for things like light gathering, clarityand reliability, but they cant work miracles