Summary: I have in my camera bag a few Tamron lenses that I am happy with and so was confident I would be happy with this one. However when I got this one I had a few disappointments with it. First, the quality of the photo was not up to par with the other Tamron lenses I have. I have also used a Nikon 80-200mm and the difference in sharpness of the photo was significant. Second, the auto focus did not consistently work.