What Lenses are the Pentax K2000 compatible with?
All of them. Any Pentax K mount lens, that is all bayonet mount lenses made since about 1975 for Pentax SLR and DLSRs, work on the K2000. The older lenses may not have the full functionality of newer lenses, ie a manual focus lens is still a manual focus lens. Some of the older lenses only meter properly in full manual mode. http://digital-photography.suite101.com/… Screw mount lenses will also work if you use the Pentax adaptor.