Barska WP Cosmos 20x80mm BAK-4 Porro Prism Astronomical Binoculars w/ Premium Carrying Case Metal Black Medium. It features BAK-4 prisms with multi-coated optics that result in remarkably crisp and clear images. It features a nitrogen-purged body that is 100percent waterproof and fog proof with a beautiful black metal finish the Cosmos series imposes a lasting impression of strength and precision. Adjustments such as individual focused eyecups lets you customize these binoculars to your personal preference. Built to withstand the darkness of space20 x 80 WP Cosmos BAK-4 w/ Premium CarryingCase by Barskais great whether you want to immerse yourself and take in the vastness of the Milky Way or a mountain range under moonlight these binoculars will be with you from one celestial environment to the next. Specifications for Barska WP Cosmos 20x80mm BAK-4 Porro Prism Astronomical Porro Binoculars w/ Premium Carrying Case: Manufacturer: Barska Color: Black Magnification: 20 x Objective Lens Diameter: 80 mm Prism System: Porro Prism Material: BAK-4 Eye Relief: 15.4 mm Exit Pupil: 4 mm Field of View Linear: 157 ft at 1000 yds Optical Coating: Multi-Coated Binoculars Focus System: Individual Eyepiece Focus Close Focus: 39.4 ft Weather Resistance: Fog Resistant Water Resistance Level: Waterproof Weight: 89.6 oz Finish: Matte Fabric/Material: Aluminum Magnification Type: Fixed Features of Barska WP Cosmos 20x80mm BAK-4 Prism Astronomical Binoculars w/ Premium Carrying Case 20x Magnification 80mm Objective Lens BAK-4 Prisms Individual Focusing System Latex Eyecups Package Contents: Barska WP Cosmos 20x80mm BAK-4 Prism Astronomical Binoculars w/ Premium Carrying Case Premium Carrying Case Neck Strap Barska AB13640: WP Cosmos 20x80mm BAK-4 Prism Astronomical Binoculars w/ Premium Carrying Case Metal Black Medium