Hey guys, I just went to an Angels MLB game, and I brought my small 5.0 megapixel, 5x zoom, casio exilim pro camera with me. Shooting at a high shutter speed of around 1/640, I was taking multiple shots of the game. But my pictures turned out all grainy. The other modes I tried came out grainy too. Was it the zoom that caused this? The shutter speed? What can I do to prevent graininess the next game I go to? Thanks!