I just purchased a D7200 and while watching videos on camera operation... I heard a comment in which I wanted to get more information about. The comment was that most camera lenses (kit to be specific) only have the ability to capture 9 megapixels even though the sensor has the ability of 20+. Is this true? If so, my kit lens from my D80 (AF-S DX Zoom-Nikkor 18-135mm f/3.5-5.6G IF-ED) is useless. Any thoughts?