Nikon F-- Error Mystery Solved

I recently discovered what's causing that infamous "F--" error. It happened when I grabbed the camera by the lens. The lens actually turned a bit and "F--" popped up immediately. That's when it became apparent to me that I could actually jiggle the lens by a milimeter to one side or the other thus causing an interruption in the lens contact with the body. This in turn causes the "F--" error.

So, don't grab your camera by the lens and if you do get the error, try to realign the lens so that it goes back to normal.