I have had the more recently made for awhile V 1-3 on many big magnums and 45-70s. Worked like a charm, never fogged, and always dialed right in. Same with the 2x7. Now, the 4x16 was hit or miss. I liked the early Tascos for shooters, only had one fog up. In the 70's I saw 3 Redfield 3x9 x TV Wide views fog up. Worthless. I never had a Weaver fog up. I've had some you had to work with to get zeroed, for sure, ha. Those early era scopes "ruint me" ( that's Texan for "more than ruined" ) for "dialing for distance", ha.