Hi. I'm brand new here, so be gentle. I shoot sports with a Nikon D1H and an 80-200mm D lens. On Saturday, a dark streak suddenly started appearing at the bottom of all my photos. It's always in the same place, at the very bottom of the photos on the right side. I was shooting in bright sunlight, Aperture priority. Some were shot with a 1.4 converter and some without it, but the streaks appeared both ways. Anyone have an idea what this could be or what can be done?