First, thanks to Amazon for quick and correct delivery. But this good service one knows Amazon. I have this lens Tamron AF 18-200mm to set to replace my previous lenses 18-55mm and 55-200mm. I wanted to use the same quality of the recordings only one lens. According to present knowledge (about 1200 photos), this is also well done. The Tamron AF works very reliably, quickly and quietly. There are no complaints in connection with my Nikon D 3100 also show pictures in almost darkness and in dark rooms that the lens very well arbeitet.Die photos come beautifully bright and lifelike over. I have often tried, just as this was rated negatively in some reviews. I must say that while I like a lot and fotogafiere and make good pictures in my opinion, but I am by far not a professional. I have a friend reported that I have such a lens. He was previously with his interest in buying very hesitant. When he dealt with me with the lens and made familiar, he has this lens immediately be ordered from Amazon. (Had previously also 2 as mentioned above.) I'm glad not when shooting in the countryside or on vacation constantly having to change the lens. (. The way the other two Obj I have successfully sold through Amazon.) Conclusion: I am very satisfied with the purchase and can only recommend it. It is very good in the hand, looks good, with sunshield (accessory) almost gigantic, works quietly and quickly and has metal threads.