Iv'e always wondered about this myself. I'm a leupold guy and have been since I could afford to put them on my rifles, clear and strong, never had a problem with them. Until that is, I ran into a guy from Iowa that was hunting the same piece of property that I was and we were standing by his truck talking about the elk and I noticed that he had a swarovski (sp?) scope on his gun so I ask if I could take a look since I've always wondered about them. All I can say is holy crap thats a good scope. Unfortunetly I don't have a couple of grand burning a hole in my pocket or I would run out and spend the money