I Bought the 650-1300 Telephoto Lens. Being a Novice, I Stripped the Part of the Lens that Connects to the Camera T- Mount. I Contacted them and They Sent Me a New T- Mount. Unfortunately, that Was Not the Part I Stripped. I Called Them and They Had Me Come Out to Their Warehouse that Was Not Too Far From My Home. They Gave Me a Brand New Lens and Showed Me How to Connect It. Great Customer Service.