Barska 10x25 WP Blackhawk Monocular BK7 Green Lens Black. The Barska 10x25 WP Blackhawk Monocular w/ Green Lens has an O-ring sealed for complete waterproof protection dry nitrogen purged sealed to prevent fogging clouding and moisture damage. The Barska 10x25 Waterproof Blackhawk Monocular w/ BK-7 Prism has multi coated optics for increased clarity BAK-4 or BK-7 prisms for crisp images and large knurled center focus knob for precise focusing. The Barska 10x25 Waterproof Blackhawk Monocular comes complete with a non-slip diamond textured rubber design for a secure grip and shock-absorbing rubber armor. Specifications for Barska 10x25 WP Blackhawk Outdoor Monocular: Magnification: 10x Objective Diameter (mm): 25 mm Angle Of View (Degree): 5.8 Degree Field Of View (ft): 303 Field Of View (m): 101 Close Focusing Dist (m): 4 Exit Pupil (mm): 2.5 mm Relative Brightness: 6 Eye Relief (mm): 11 mm Lens Coating: MC Lens Color: Green Prism Type: Prism Glass: BK7 Focusing System: Eyepiece Special Features: Waterproof Body Material: enhanced ABS Finish / Color: Black Eyecups: Rubber Accessories: Tripod adaptable: Yes Pouch: Yes Features of Barska 10x25 WP Blackhawk Monocular: BK-7 Roof Prism Multi-coated Optics 58 Field of View Diamond Pattern Rubber Grips Nitrogen-Filled Water and Fogproof Eyepiece Focus Fold-Down Rubber Eyecup Rubber Armored Body Focus System Center Magnification (Fixed) 10x Close Focus (ft/m) 13/4 Eye Relief 11mm Objective Lens 25mm Exit Pupil 2.5mm Package Contents: Barska 10x25 Waterproof Blackhawk Monocular w/ Green Lens Carrying case Neck strap Limited Lifetime Warranty Barska AA12130: 10x25 WP Blackhawk Monocular BK7 Green Lens Black