Alpen Alpen Apex XP 10x42 ED Binocular BAK4 Multicoated Dark Green Medium Roof. Each rugged Apex XP Binocular is waterproof for all-weather performance and purged with nitrogen gas to create an internal environment that is impervious to fogging. Specifications for Alpen Alpen Apex XP 10x42mm ED Roof Prism Binocular: Manufacturer: Alpen Color: Dark Green Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Eye Relief: 15.2 mm Field of View Linear: 340 ft at 100 yds Binoculars Focus System: Center Focus Close Focus: 8.2 ft Weather Resistance: Fog Resistant Water Resistance Level: Waterproof Weight: 2.3 lb Magnification Type: Fixed Features of Alpen Alpen Apex XP 10x42 ED Binocular HD High definition ED Extra low dispersion optical system PXA phase coating for superior resolution and color fidelity HR metallic prism coating for enhanced light transmission and brightness Waterproof Fog-proof BAK4 Optics Lightweight Fully Multi-Coated Item Number 653 Magnification 10x Waterproof Yes 1m/30mins Field of View 340FT / 113M Lens Coatings Fully Multi-Coated Eye Relief 15.2mm Focuser Type Center Objective Lens Diameter 42mm Close Focus 8.2m Prism Roof/BaK-4 Eyecup Type Twist-Up Weight 2.3LB / 1042G Package Contents: Alpen Alpen Apex XP 10x42 ED Binocular Bag Lens cleaning tool Alpen 653: Alpen Apex XP 10x42 ED Binocular BAK4 Multicoated Dark Green Medium Roof