|I would suspect either the lens isn't sending the correct information to the camera about the aperture or the camera isn't properly interpreting the data the lens is sending it. Either way this is most likely something a camera technician is going to have to fix. |
You might try doing a reset on the camera. Looking around on the Interweb it looks like there are two buttons on the back of the camera marked with green dots. Hold those down for 5 seconds. You might also consult the manual and see if there is another way to do a hard reset.
See here for a picture of the buttons - https://support.nikonusa.com/app/an...
There is also a phone number for Nikon support on this page.
message edited by THX 1138