Hi all. Odd issue with my Nikon 80-200mm f2.8 D. The fEE error is continuous at all apertures and clears up only when the manual aperture ring setting is set to f4. All other apertures produce the fEE error. What is the issue here? Am I correct in assuming the f4 is registering as f22? Is it OK to use it on f4 or should it be repaired to avoid an unpredictable issue at the worst possible time? Thanks!