Featuring waterproof (JIS Class 6) construction and a unibody design, the PENTAX 8x25 UCF WP binocular isn't afraid of a little water. Compact, lightweight, and packed with performance, it provides a 324 foot field of view and 8X magnification. Nitrogen-filled, waterproof design for use in extreme weather conditions Central fingertip control locks in diopter adjustment Black rubber housing protects against dust and scratches Revolutionary dual-axis, single body housing with synchronized eyepiece adjustment to assure correct optical alignment for comfortable viewing Fast and easy adjusting center focusing for handling ease Slide-style eyepiece rings for quick adjustment of eye relief Fully multi-coated optical eliminates harmful UV rays while improving light transmission and contrast with no flare or glare Inverted porro-prism design results in compact, light-weight body High-quality BaK4 prisms for maximum light transmission and illumination Binocular Type: Porro prism, center focusing (linked-dual-axis) Lens Construction: 3 elements in 2 groups; Eyepiece Lens: 5 elements in 5 groups Coating: Fully multi-coated Magnification: 8X Objective Lens Diameter: 25mm Real Field of View: 6.2 degrees Apparent Field of View: 50 degrees Field of View at 1000m: 108m Field of View at 1000 Yards: 324' Exit Pupil: 3.1mm Eye Relief: 15mm Prism: Porro Multi Layer Coating: Yes Minimum Focusing Distance: 6.2' Relative Brightness: 9.6 Diopter Adjustment Range: +/- 3m -1 Eye Distance Adjustment Range: 2.2 - 3.1" Focusing Range: 6.2' - infinity Eyepiece Ring: Helicoid Type Body Color: Midnight Blue Height & Width: 4.3 x 4.6" Thickness: 2.7" Weight: 12.3 oz. Waterproof: 1m depth of water (JIS Class 6) Accessories: Eyepiece Lens Cap, Case, Strap