I can echo David's description of this lens, I have owned several and these lenses and the presence of the rare earth element Lanthanum really makes a drastic difference in the way this lens resolves the image, super sharp with great contrast and color reproduction. The FSU lenses have not always been the best constructed but they more than make up for that with the optics! At $17 wow, better than you can get from the FSU and you don't have to wait a month for it! LOL.