So, I'm having lots of fun with my macro extension tubes. I put that little swarovski crystal here on a CD, put some lighting, 50mm f/1.8+AF extension tubes (the whole set, 13/21/31)... And voila! Lots of pretty colors! I had to clean it like crazy to remove all of the bare-eye-invisible-itty-bitty-tiny little scratches and imperfections on that one. It's horrible how macro makes those little flaws stand out! I have to thank the content-aware spot healing tool!