What determines the field of view in a binocular?
A5. Field of view is determined by magnification and the eye piece design. In general, as magnification increases, FOV decreases. A 10x will show more detail in that fence at 1000 yards than an 8x, but it will not show you as wide a section of fence. Binoculars employing a wide-angle design eye piece will enable you to see a wider section of the fence than binoculars a standard eye pieces. High quality Wide-Angle design pieces are usually very expensive; while inexpensive binoculars with wide angle eyepieces do not usually yield the same crisp images that standard binoculars do. Although a wider FOV is preferred when viewing fast moving action like flying birds or horse racing, please note that a FOV difference of 30 feet at 1000 yards is not significant.
