Another potential lock problem: if the aperture ring on a Nikkor AF lens comes unlocked from its smallest aperture setting, the camera will display “fEE” on the top display and won’t shoot. The tab at the upper right is the lock, but I’ve never gone a month without one coming unlocked.

Another potential lock problem: if the aperture ring on a Nikkor AF lens comes unlocked from its smallest aperture setting, the camera will display "fEE" on the top display and won't shoot. The tab at the upper right is the lock, but I've never gone a month without one coming unlocked.

Another potential lock problem: if the aperture ring on a Nikkor AF lens comes unlocked from its smallest aperture setting, the camera will display “fEE” on the top display and won’t shoot. The tab at the upper right is the lock, but I’ve never gone a month without one coming unlocked.