Lucid Optics Binocular 8x42mm Binocular ED Open Frame w/ Hard Case Matte Black. Specifications for Lucid Optics Roof Prism Binocular 8x42mm ED Open Frame w/ Hard Case: Manufacturer: Lucid Optics Color: Matte Black Black Magnification: 8 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK-4 Eye Relief: 18 mm Exit Pupil: 14 mm Field of View Linear: 341 ft at 1000 yds Interpupillary Distance: 52 - 72 mm Close Focus: 5.75 ft Diopter Adjustment Range: 2.75 dpt Weather Resistance: Rain Resistant Water Resistance Level: IPX-8 Length: 6.5 in Weight: 24 oz Finish: Matte Additional Features: Rubber Armored Included Accessories: padded strap cover hard case Magnification Type: Fixed Package Contents: Lucid Optics Binocular 8x42 ED Open Frame w/ Hard Case Lucid Optics L-B8-8x42: Binocular 8x42 ED Open Frame w/ Hard Case Matte Black