20 X 50mm Waterproof Clear Vision Binoculars Green The black 20x50mm PowerView Binocular from Boshile is a general purpose Porro prism binocular featuring multicoated optics and a unique InstaFocus lever. Instead of a conventional focus wheel, which can be difficult to grip while wearing winter gloves, Bushnell's InstaFocus system permits quick and easy focusing by pressing on a lever located between the lens barrels. A Porro prism design allows PowerView binoculars to display lifelike depth of field. Features: Porro Prism Design Multicoated Optics Wide Angle Viewing InstaFocus Center Focus Lever Rubber Armored Housing Specifications: Prism Type: Porro Magnification: 20X Objective Lens Diameter: 50mm Angle of View: 6.5 Degrees (actual) Field-of-View: 168' at 1000 yd / 55 m at 1000 m Minimum Focus Distance: 20' / 6.10 m Exit Pupil Diameter: 5.0 mm Eye Relief: 10 mm Interpupillary Adjustment: Not Specified By Manufacturer Dioptric Correction: Not Specified By Manufacturer Focus Type: Center Tripod Mount: None Dimensions: 7.5 x 6.4 x 2.3" / 19 x 17.5 x 6.0 cm Weight: 885 g What's in the box 1 x Boshile 20 X 50mm Waterproof Clear Vision Binoculars 1 x carrying bag 1 x neck strap