The Vortex Optics Sheltered Wings Raptor Binocular 8.5 x 32 (SWR385) features an advanced porro prism that brings a three-dimensional appearance, incredible depth of field, and a wide field of view. It has an adjustable, twist up and down eyecups that provide convenience in viewing with or without eyeglasses. At the right eyepiece is a diopter that is intended to be adjusted for dissimilarity in a user's eyes. The center focus wheel adjusts the focus of both binocular barrels at the same time. Product has a 390' / 7.4° (1000 yards / degrees) field of view and it weighs for only 17.3 ounce. The unit is enhanced with a pair of porro prisms, and a water and fog resistant construction that avoids moist, dust or debris from reaching the interior of the binocular. Raptor is built with a rubber armor for a secured, slip-free grip and a sturdy external construction.