The Celestron TrailSeeker ED 10x50mm Roof Binoculars deliver exceptional optical performance for birders, hunters, and outdoor enthusiasts. Featuring ED objective lenses that reduce chromatic aberration, these binoculars provide sharp detail and accurate color reproduction. The 50mm objective lenses gather ample light for brighter views in low-light conditions, while fully broadband multi-coated optics maximize light transmission for increased clarity. Phase- and dielectric-coated BaK-4 prisms enhance brightness and contrast for vivid, true-to-life images. With a wide 6.5-degree angular field of view and 9.8-foot close focus, you can easily track subjects in motion or observe at closer range. The streamlined roof prism design features a durable magnesium alloy construction that's waterproof and nitrogen-filled to prevent internal fogging. At 16.9mm of eye relief and 10x magnification with a 5mm exit pupil, these binoculars offer comfortable extended viewing. Tripod-adaptable for stability during long observation sessions. Includes soft carrying case, neck strap, harness strap, lens covers, and lens cloth. Dimensions: 6.6 x 5.4 x 2.5 inches; Weight: 31.6 oz.