Kowa - 10x25 BD25-10 Binoculars (Green)

A Guide to Birding with Binoculars

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.

Christopher Witt

4 years ago

Christopher Witt

11 months ago

Joseph Albanese

5 years ago

Todd Vorenkamp

5 years ago

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 fogproof performance

Slip-resistant protective rubber armoring

Lightweight: 11.3 ounces

• 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.