I'm thinking to try my hand at macro photography. I have a Nikon D80 with a couple zoom lenses. I found this page: http://www.nikonlinks.com/unklbil/macro_adapter.htm Any recommendations on quality versus functionality and price? The diopter looks the easiest to work with and cheapest, although I'm not sure about the quality. A macro adapter ring looks interesting as does the lens stacking. I wouldn't mind trying them all, but price and availability is a factor.