Kowa BD III 10x50 XD Binoculars (Kowa, SKU: 138463 / 12803) are roof prism binoculars designed for birdwatching, wildlife and landscape observation, and viewing other distant subjects. The 10× magnification is combined with large 50 mm objective lenses and a 5 mm exit pupil, supporting observation in lower-light conditions. Kowa XD optics use fluorite-rich low-dispersion ED glass to help reduce chromatic aberration and preserve natural colour reproduction. The lightweight magnesium alloy body, waterproof nitrogen-filled construction, and protective KR coating prepare the binoculars for regular use in the field.

Key features

• 10× magnification providing high detail when observing distant birds, wildlife, and landscapes
• large 50 mm objective lenses providing high light-gathering capability and good usability in lower-light conditions
• 5 mm exit pupil supporting comfortable observation at dawn, dusk, and under overcast skies
• Kowa XD lenses made from fluorite-rich low-dispersion ED glass, reducing chromatic aberration and colour fringing around high-contrast subjects
• high contrast and natural colour reproduction facilitating recognition of fine details in observed subjects
• 6.6° true field of view, corresponding to approximately 115 m at a distance of 1000 m
• roof prism optical system allowing a compact and easy-to-carry construction despite the use of 50 mm objective lenses
• fully multi-coated optics and prism phase coatings supporting light transmission, contrast, and detail reproduction
• protective Kowa KR coating reducing the adhesion of water, dust, grease, and other contaminants to optical surfaces
• minimum focusing distance of 3.5 m allowing observation also at relatively short distances
• 17 mm eye relief providing a comfortable eye position during extended observation sessions
• adjustable Twist-Up eyecups allowing the eye position relative to the eyepieces to be adapted
• central focusing wheel enabling rapid image adjustment to the distance of the observed subject
• diopter adjustment allowing differences between the user's right and left eye to be compensated
• interpupillary distance adjustment range of 57–76 mm allowing the binoculars to be adapted to the user
• lightweight and rigid body made from magnesium alloy
• waterproof construction suitable for use in changing outdoor conditions
• nitrogen filling reducing the risk of internal fogging of the optical system
• tripod mounting socket allowing the use of a compatible adapter for stable extended observation sessions
• weight of 725 g providing a relatively low carrying load for binoculars with 50 mm objective lenses

Set contents

• Kowa BD III 10x50 XD binoculars – 1 pc.
• soft carrying case – 1 pc.
• carrying strap – 1 pc.
• objective lens caps – 2 pcs.
• eyepiece cover – 1 pc.
• instruction manual – 1 pc.

Technical specifications

• manufacturer: Kowa
• series: BD III-XD
• model: BD III 10x50 XD
• manufacturer catalogue number: 12803
• EAN: 4580614171946
• optical design: roof prism binoculars
• focusing system: central focusing
• magnification: 10×
• objective lens diameter: 50 mm
• XD optical element material: fluorite-rich low-dispersion ED glass
• optical coatings: multi-coating, fully multi-coated optics, phase coating, and protective KR coating
• exit pupil diameter: 5 mm
• eye relief: 17 mm
• true field of view: 6.6°
• field of view at 1000 m: approximately 115 m
• twilight factor: 22.4
• minimum focusing distance: 3.5 m
• maximum focusing distance: infinity
• interpupillary distance adjustment range: 57–76 mm
• eyecup type: adjustable Twist-Up
• body material: magnesium alloy
• weather protection: waterproof construction
• body filling: nitrogen
• tripod mounting socket: yes
• dimensions (length × width × height): 160 × 134 × 57 mm
• weight: 725 g

The combination of 50 mm objective lenses, 10× magnification, XD optics, and a 5 mm exit pupil makes the Kowa BD III 10x50 XD well suited to detailed outdoor observation carried out also in less favorable lighting conditions.