Alpen Wings 8x42 Binocular BAK4 Multicoated Dark Green Medium Roof. Designed with versatility in mind these binoculars have an open bridge for steady gripping and feature twist-up eyecups to comfortably accommodate observers with or without eyeglasses. In addition to being waterproof Wings binoculars have rubber armoring for protection against minor bumps and are purged with an inert gas to prevent internal fogging. Specifications for Alpen Wings 8x42mm Roof Prism Binocular: Manufacturer: Alpen Color: Dark Green Magnification: 8 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 17.3 mm Field of View Linear: 406 ft at 1000 yds Optical Coating: Multicoated Binoculars Focus System: Center Focus Close Focus: 8 ft Water Resistant Mark: 1 m Water Resistance Level: Waterproof Weight: 35.2 oz Magnification Type: Fixed Package Contents: Alpen Wings 8x42 Binocular Bag Lens cleaning tool Alpen 542: Wings 8x42 Binocular BAK4 Multicoated Dark Green Medium Roof