Hi there, I send my 500mm AF-S I to nikon Canada in Ontario. The manual and AF wont work. They cant fix it because there is no part avalaible for it. Before sending it they say they have all part for this model !!! Not sure what exactly is the problem but seem the AF module is broken or something like that and have to be replace. Any of you have any idea of what i can do beside use it has a paperweight. Thanks to you for any reply !