I recently purchased a Nikon D50 with a Tamron 28-80mm and a Tamron 70-300mm lens. I figured I would be able to use the 28-80 for the occasional closeup pic (not like really close, but relatively.. see example) I would do. Bare with me as I don't *fully* understand lenses. Anyway, I've been trying to get a picture with it and I just can't. It seems to be out of focus? Just hoping for some tips and so on. Here is a picture that I am trying to get but can't, for example.