Amazon.comBushnell Powerview Roof Prism Binoculars are designed to provide high-quality optics in a versatile and durable format--at an affordable price. Constructed with a rugged, shock absorbing rubber armor for a comfortable, non-slip grip and equipped with the roof prism system for increased durability, Powerview Binoculars are suitable for multiple applications both indoors and in nature. The 10x25 Powerview Binoculars offer powerful 10x magnification with compact 25-millimeter objective lenses that allow you to get a high level of detail in a smaller package. Meanwhile the BaK-7 prisms and multi-coated optics provide high-level image resolution and clarity. Additional user friendly details include a center focus knob for easy adjustments, fold down eye cups, and a folding design. Bushnell Powerview Binoculars carry a limited lifetime warranty against defects in materials and workmanship for the original owner.Key Features: BaK-7 prisms Roof prism system Multi-coated optics Non-slip, shock-absorbing rubber armor Center focus system Fold-down eyecupsSpecifications: Magnification: 10X Objective Lens: 25 millimeters Close Focus: 21 feet / 6.4 meters Field of View: 300 feet at 1000 yards / 100 meters at 1000 meters Eye Relief: 9 millimeters Exit Pupil: 2.5 millimeters Weight: 8.5 ounces / 242 grams Model: 132516 Size Class: CompactAbout Roof Prism Binoculars:The prism system of a binocular reduces the size needed to contain a long optical path and turns what would be an upside-down image right-side-up. In roof prism binoculars, the prisms overlap closely, allowing the objective lenses to line up directly with the eyepiece. The result is a slim, streamlined shape in which the lenses and prisms are in a straight line. Roof prism binoculars are less bulky and more rugged than an equivalent porro model.Product DescriptionThe complete performance and value all rolled into one. These binoculars feature a non-slip rubber Armor, contemporary design and fully-coated optics so no view is missed