I bought my new D80 yesterday, and during my conversation with the manager I asked him about buying a telephoto converter. He pretty much just steered me away from them and told me how much it would ruin the quality of my photos. One of the lenses I bought was a Nikor 70mm to 200mm with VR, and wanted to buy a telephoto converter, pretty much as a cheap way to get more zoom. My question, I'm not a pro, just a young noobie really looking to break into photography, maybe sell a few photos of high school football games who knows. How much quality do you lose with a converter as opposed to the real deal.