Have heard about extension tubes (and baffles) for awhile, but never tried them out. My buddy loaned me a set of kenko tubes and I tried them out -- I'm impressed! The following shots taken with a Canon 10D + 100 Macro lens, with progressively longer tubes being added after each shot. just the lens itself with 12mm tube with 20mm tube with 36mm tube with 12+20+36mm tube the tubes are relatively cheap -- about $120. I think I'll get a set!