Celestron Regal ED 10x42mm Roof Prism Binoculars Matte Black. Celestron designed these Binoculars with Extra-low Dispersion (ED) glass that's fully multi-coated for enhanced brightness high contrast and results in virtually no chromatic aberration. These Celestron Regal ED 10x42mm Roof Prism Fogproof Binoculars offer generous eye relief for maximum comfort during extended viewing sessions especially for eyeglass wearers. Pick up these Celestron Regal ED 10x42 Roof Prism Waterproof Binoculars to improve your viewing sessions while hunting birding or exploring nature. Specifications for Celestron Regal ED 10x42mm Roof Prism Binoculars: Manufacturer: Celestron Color: Black Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 20.2 mm Exit Pupil: 4.27 mm Field of View Linear: 340 ft at 1000 yds Field of View Angle: 6.5 degrees Optical Coating: Fully Multi-Coated Binoculars Focus System: Center Focus Twilight Factor: 20.49 Interpupillary Distance: 56 - 74 mm Close Focus: 4.9 ft Diopter Adjustment Range: -2 - 2 dpt Weather Resistance: Yes Water Resistance Level: IPX-7 Length: 5.9 in Weight: 27.1 oz 28.1 oz Finish: Matte Package Type: Box Included Accessories: Carrying Case Objective Lens & Eyepiece Caps Neck Strap Carrying Harness Lens Cloth Quick Start Guide Magnification Type: Fixed Features of Celestron Regal ED 10x42 Roof Prism Binoculars Extra-Low Dispersion (ED) objective lenses provide high resolution high contrast images that are virtually free of optical defects such as chromatic aberration (color fringing) Flat field technology ensures level edge-to-edge image clarity Fully multi-coated optics deliver maximum light transmission throughout the optical path. Phase and dielectric coated BaK-4 prisms produce vivid true-to-life colors. Eyeglass friendly - generous eye relief and sturdy twist-up eyecups with multiple stops Well-balanced ergonomic industrial design 4.9 close focus Tripod adaptable Package Contents: Celestron Regal ED 10x42 Roof Prism Binoculars Carrying Case Objective Lens & Eyepiece Caps Neck Strap Carrying Harness Lens Cloth Quick Start Guide Celestron 71391: Regal ED 10x42 Roof Prism Binoculars Black