Its likely that the specifics have changed, but back in the 90's after numerous years of hunting abuse, my Swarovski 10x40 porro prisms finally went out of collimation. I drove into Red Deer, to a camera shop that sold a few Swarovski products. They shipped them to Ontario somewhere and then Ontario shipped them to Austria. They came back in about a month, fully adjusted and looking new. No charge except for the first shipping charge to Ontario...I think it cost around $15. I originally bought those Swaros second-hand. I was not the original owner and didn't claim to be. I still use them. They have found a lot of game for me. Excellent warranty service.