You don't say what 80-200..
If it#s the AF-S, a Kenko 1.4 Pro 300 DG or Nikkor 1.4x TC-E or TC-EII
Non AF-S, the Kenko is your only option.
Sure this Q. has come up several times as my answer is giving me deja vu..!
Ok so do you think its worth getting the 1.4x ?