Bushnell Marine Porro Prism Binoculars 7x50mm BAK-4 Blue. The Bushnell Marine Binocular 7x50 is equipped with BaK-4 porro prisms to prevent glare from the water surface and enhance contrast for precise visual clarity. This marine-ready Bushnell binocular is buoyant waterproof and corrosion resistant so it is the perfect binocular for the sea. The Marine 7x50 Binocular from Bushnell features a durable rubber armor grip which is also shock absorbing. Specifications for Bushnell Marine 7x50mm Porro Prism Binoculars: Manufacturer: Bushnell Color: Blue Magnification: 7 x Objective Lens Diameter: 50 mm Prism System: Porro Prism Material: BAK4 Eye Relief: 18 mm Exit Pupil: 7.1 mm Field of View Linear: 380 ft at 1000 yds Optical Coating: UV Fully Multi-Coated Binoculars Focus System: Individual Eyepiece Focus Close Focus: 25 ft Water Resistance Level: Waterproof Weight: 36 oz Package Type: Box Additional Features: Standard Included Accessories: Standard Magnification Type: Fixed Compass: No Tripod Adaptable: Yes Eyecups Types: Fold Down Fogproof: Yes Size Class: Standard Features of Bushnell Marine 7x50mm Porro Prism Binoculars: BaK-4 porro prisms for bright clear crisp viewing Fully Multi-coated optics for superior light transmission and brightness 100percent waterproof / fogproof O-ring sealed and nitrogen-purged to keep out moisture Highly resistant to saltwater corrosion Non-slip non-skid rubber armor cushions bumps and shock prevents sliding and provides a firm grip when wet Hermetically sealed Fold-down eyecups Package Contents: Bushnell Marine 7x50mm Porro Prism Binoculars Bushnell 137501: Marine Porro Prism Binoculars 7x50mm BAK-4 Blue