Alpen Alpen Apex 10x42 Binocular BAK4 Multicoated Dark Green Medium Roof. These optical choices maximize light transmission and generate brilliant images with true-to-life color and crisp definition even in low light conditions. All Apex binoculars are waterproof for all-weather performance and purged with nitrogen to prevent internal fogging and keep contaminants like dust and dirt out of the barrels. Each model has a sleek roof prism design that works with the durable rubber armoring to provide a comfortable grip. Additional features include twist-up eyecups and generous eye relief that are ideal for those who wear glasses. Each binocular comes with a deluxe travel case a rubber rain guard and a wide comfortable neck strap. Specifications for Alpen Apex 10x42mm Roof Prism Binocular: Manufacturer: Alpen Color: Dark Green Magnification: 10 x Objective Lens Diameter: 42 mm Prism System: Roof Prism Material: BAK4 Field of View Linear: 340 ft at 100 yds Optical Coating: Multicoated Binoculars Focus System: Center Focus Close Focus: 8 ft Weather Resistance: Fog Resistant Water Resistance Level: Waterproof Weight: 2.3 lb Magnification Type: Fixed Features of Alpen Alpen Apex 10x42 Binocular Waterproof Fog-proof BAK4 Optics Lightweight Fully Multi-Coated Item Number 617 Magnification 10x Waterproof Yes 1m/30min Field of View 340FT / 113M Lens Coatings Fully Multi-Coated Focuser Type Center Objective Lens Diameter 42mm Close Focus 8FT / 2.5M Prism Roof/BaK-4 Eyecup Type Twist-Up Weight 2.3LB / 1042G Package Contents: Alpen Alpen Apex 10x42 Binocular Bag Lens cleaning tool Cleaning Pen Alpen 617: Alpen Apex 10x42 Binocular BAK4 Multicoated Dark Green Medium Roof