Nikkor AF-S 300mmm F/4D IF-ED faulty AF
My 9 years old Nikkor AF-S 300mmm F/4D IF-ED is showing some AF problem and starts behaving erratically. AF works fine for 30 minutes and then stops functioning. I got to give it some rest (couple of hours/days) for it to start focusing again. I suspect there must be a problem with the AF motor, considering the age of the lens and corresponding wear and tear. Has anyone had similar experience? If so, any idea of the repair costs?