I consider the lens barely used simply because I am just a photography enthusiast. I tend to be inside more often then not and I am unable to use this lens. Don't get me wrong, its a great lens but nothing compared to the Nikon glass. I am not replacing it with another 70-200 right now. I am trying to sell my sigma 24-70 and 70-200 to get a used Nikon 24-70. From what I heard and read, all nikon glass is sharper and faster at focusing. So i am slowly going to pick up Nikon lenses instead of the sigmas.