The second variable in selecting a pair of binoculars is field of view. That is the image width or area visible at a certain distance. For instance, a typical field of view might be 350 feet at 1,000 yards. As magnification increases, field of view decreases. Thus, an eastern woodland whitetail hunter might prefer an 8x35 glass for its wider field of view in close quarters, as opposed to the 10x42 binoculars carried by a western elk hunter or, say, the 15x70 honkers of a backyard astronomer. Let use and environment guide your choice.