The new Nikon D3 is the first camera from the company with a full-size sensor. Well, almost full-size. One side of the frame is 0.1 millimeter short. The sensor has 12.7 megapixels, which is not exceptional. Its light sensitivity, however, is another matter. The camera’s maximum ISO setting is 25,600, about 64 times what was commonly regarded as high-speed film.