Bushnell? H 2 O Binoculars These binoculars are made for the elements. With true waterproof construction and a rugged, non-slip rubber design. Totally O-ring sealed for true waterproof protection and nitrogen purged for fogproof viewing in any weather conditions. Fully and multicoated optics render bright, crisp images. Sporting a large center focus knob for easy, precise adjustments and shock-absorbing rubber armor. Bushnell? H 2 O Roof Prism Binoculars Compact models have a roof prism design along with fully coated lenses. The full size models feature multicoated lenses and twist-up eyecups. FOV = field of view at 1000 yds.(ft).