So lately I have been having an issue with my D800 and my Nikon ED AF Nikkor 80-200mm 2.8 D lens. Unless I apply upward pressure to the bottom of the lens, the camera doesn't want to read it. The lens works perfectly on my D700, F4 & F5. I have attempted to clean the lens connector tabs on the camera, but it still giving me issues. All of my other lenses work perfectly on this camera. Any ideas on how to remedy this? Thanks in advance!