I have an old scope from the 70's that my dad bought for his 30-06 back then. Its a Bisle 4x32, I have never heard of them or dont even know if its a good scope. On the occular lens housing it says Bisle 4x32 nitrogen filled. reminds me alot of a tasco. apparently the nitrogen leaked out over the years since in cold weather the scope fogs up from the inside. any help is appreciated thanks

I'd say if it fogs up from the inside then it's time to invest in a new one. May I recommend a Nikon. Depending on your price range the Monarch or the Buckmasters.

If nobody on here knows anything about a Bisel you might try the SWFA rifle scope forum. Lot of very knowlegeable people on there.

Theres not much you can do in this situation, but invest in a new scope. I would be happy to help if you need any suggestion or ideas on places to purchase or information on any scope.