http://www.nikonchat.com/macro-nikon-d5000/

D5000 I have a Nikon F mount, is there ANY lens adapter so I can use old Canon and Pentax lenses?
I have 17 years and am getting a passion for photography, I bought Nikon D5000, but I'm starting to feel limited by the stock 55mm lens-18. My mother thought it would be useful and gave me his old SLR lenses, a Canon 35mm standard lens and a Canon FD 35-105 zoom lens. A lens 80-200mm Tokina and PMC II, Super Macro Paragon. Indeed, if any of them may attach these lenses to the camera? All links to useful pages or whatever, would be great. Thanks:)
This article must answer your question: Ask your mom http://diglloyd.com/articles/ask/lenses-LensAdapters.html if you can sell your old lenses and use the money to buy Nikon lenses.
Macro Movie 2 (Nikon D5000) by OCNinon