"The Tamron AF 55-200mm Di II LD Macro is a lens aimed at consumers who have bought a DSLR with an 18-55 kit lens, but now want something that covers longer focal lengths.
Overall the Tamron AF 55-200mm Di II LD Macro makes a reasonable companion to an 18-55. It's optically decent, if not outstanding, especially when stopped down to f5.6. It would be expected to give good 4x6 and 5x7 prints, but at 8x10 and up, especially in the corners wide open, it's not going to be as good as a more expensive lens."