Remember the Nikon D600 sensor dust issue? The problem—and resulting service advisory—dominated the headlines for a couple of years, from the time the issue first surfaced in 2012 until Nikon announced it would fix all D600s for free in 2014. But it seems that free service is finally coming to a close. According to a notice published by Nikon Japan, Nikon will stop offering free repair service for affected D600s on January 10th, 2020—exactly six months from today. “As of…