Okay folks, I need your guidance again. You convinced me to jump into digital with the D50. I LOVE it. But I have a real need to go macro with some stuff. In the old days I had THREE macros, the incredible 55, the 60AF and the unbelievable 105!! What a lens. Now my circumstances are more modest and I can't pop for those high ticket Nikon primes. Which budget lens can I use? Thanks again. Oh. Why use a C.Polarizer if I can do whatever I want with my sky on the computer?