• Phase-Corrected Roof Prisms
• Reflective C3 Aluminum Prism Coatings
• Fully Multi-Coated Optics
• Short 6' Close Focus Distance
• Nitrogen-Filled, Water and Fog-proof
• Closed-Bridge Configuration
• Large Center Focusing Knob
• Twist-Up Click-Stop Eyecups
• Slip-Resistant Protective Rubber Armor

The lightweight and compact Kowa 10x25 BD25-10 Binoculars are intended for hikers, birders, and outdoor enthusiasts, with performance-enhancing features that include phase-corrected prisms with highly-reflective C³ coatings and fully multi-coated optics to produce bright and crisp high-contrast views with accurate color fidelity. A short 6' close focus makes them ideal for enjoying detailed observations of small subjects like feeding hummingbirds, butterflies, or insects. The housing is nitrogen-filled to make the binoculars fully waterproof and prevent fogging when moving through extreme temperature changes. The combination of compact form factor and lightweight design make the BD25 easy to carry in a pocket, pack, or bag without adding bulk or heft to your load, so you can carry them with confidence that you'll never miss a glassing opportunity on the trail, in the field, or at the stadium.

Optical Performance

• 10x magnification
• 25mm objective lenses
• Compact Schmidt-Pechan roof prism optical path
• C³ aluminum prism multi-coatings:
• Increases reflectivity to higher than 99% across the entire visible spectrum
• Produces bright and crisp images with accurate color fidelity
• Phase-correcting prism coatings:
• Correct chromatic aberration
• Improves color rendition while eliminating color shift and off-axis comas
• Fully multi-coated optics improve light transmission, color rendition, and contrast
• Short 6' close focus distance allows for detailed observation of small subjects like hummingbirds, butterflies, and insects
• 263' field of view at 1000 yards
• Long 17.7mm eye relief
• 2.5mm exit pupil

Use and Handling

• Closed-bridge configuration
• Large knurled center focus knob
• Right-eye dioptric correction helps to customize to optical prescriptions for use without eyeglasses
• 56-74mm interpupillary distance adjustment range
• Twist-up click-stop eyecups for comfortable use with or without eyewear

Construction Details

• Nitrogen-filled for water and fog-proof performance
• Slip-resistant protective rubber armoring
• Lightweight: 11.3 ounces

What’s Included?

• Kowa 10x25 BD25-10 Binoculars (Green)
• Neck Strap
• Neoprene Case
• 2 x Ocular Lens Caps
• 2 x Objective Lens Caps
• Limited Lifetime Warranty

Specification

Prism Type	Roof
Magnification	10x
Objective Lens Diameter	25 mm
Angle of View	5° (Actual)
Field of View	262.95' @ 1000 yd / 87.3 m @ 1000 m
Minimum Focus Distance	5.9' / 1.8 m
Exit Pupil Diameter	2.5 mm
Eye Relief	17.7 mm
Inter-pupillary Adjustment	56 to 74 mm / 2.2 to 2.9"
Diopter Adjustment	Yes
Focus Type	Centre
Fog-proof	Yes, Nitrogen Filled
Water Resistance	Waterproof
Dimensions	4.4 x 4.2 x 1.5" / 11.1 x 10.7 x 3.9 cm
Weight	11.3 oz / 320 g
Package Weight	1.055 lb
Box Dimensions (LxWxH)	6.2 x 5.75 x 2.2"