Kowa BD III-XD 8x42
Model BDIII42-8XD
The Kowa BD III-XD 8×42 binoculars combine 8x magnification with 42mm objective lenses for birdwatching, wildlife observation, and outdoor exploration. XD low-dispersion glass is designed to reduce chromatic aberration, while the 8.2° field of view helps users scan broad landscapes and follow moving subjects. The magnesium-alloy body keeps the design lightweight, and waterproof, nitrogen-filled construction supports use in changing outdoor conditions.
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Key Features
Discover the key optical and construction features of the Kowa BD III-XD 8×42, designed for detailed outdoor observation with low-dispersion glass, a wide field of view, and a durable, lightweight body.
8x
Magnification
42 mm
Objective Lens
XD Glass
Color Accuracy
8.2°
Wide View
Waterproof
Fog Protection
Magnesium
Lightweight Body
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Quick Specifications
| Specification | Details |
|---|---|
| Magnification | 8× |
| Objective Lens | 42 mm |
| Prism Type | Roof Prism |
| Lens Glass | XD Low-Dispersion |
| Field of View | 429 ft / 1,000 yd |
| Close Focus | 5.9 ft / 1.8 m |
| Weight | 21.3 oz / 605 g |
About This Model
The Kowa BD III-XD 8×42 is designed for birdwatchers, wildlife observers, and outdoor enthusiasts who need a versatile binocular for everyday field use. Its 8x magnification and 42mm objective lenses provide a practical balance between detail, viewing comfort, and portability across a range of outdoor settings.
The XD low-dispersion glass is designed to reduce chromatic aberration, helping control color fringing around high-contrast subjects. The 8.2° real field of view supports broad-area observation, while the minimum focusing distance of 1.8m allows users to examine nearby subjects as well as distant wildlife.
A magnesium-alloy body helps keep the binocular lightweight. Waterproof and nitrogen-filled construction is intended to protect the optical system in challenging weather, while Kowa’s KR coating helps protect lens surfaces from dirt and residue. These features make the BD III-XD 8×42 a versatile option for regular outdoor observation.
Full Specifications
The Kowa BD III-XD 8×42 combines wide-angle optics, XD low-dispersion glass, and a lightweight magnesium-alloy body. Review its complete technical specifications, including optical performance, focusing distance, dimensions, weight, and construction features.
| Specification | Details |
|---|---|
| Brand | Kowa |
| Model | BD III-XD 8×42 |
| Model Number | BDIII42-8XD |
| Magnification | 8× |
| Objective Lens Diameter | 42 mm |
| Optical Glass | XD (Extra-low Dispersion) glass |
| Prism System | Roof prism |
| Real Field of View | 8.2° |
| Field of View at 1,000 yd | 429 ft |
| Field of View at 1,000 m | 143 m |
| Exit Pupil | 5.3 mm |
| Relative Brightness | 28.1 |
| Twilight Factor | 18.3 |
| Eye Relief | 17.2 mm (Kowa USA specification) |
| Minimum Focusing Distance | 5.9 ft / 1.8 m |
| Interpupillary Distance | 57–76 mm |
| Dimensions (L × W × H) | 137 × 129 × 51 mm / 5.3 × 5.0 × 2.0 in |
| Weight | 605 g / 21.3 oz |
| Body Material | Magnesium alloy |
| Waterproof Construction | Yes |
| Nitrogen Filled | Yes |
| Lens Protection Coating | Kowa KR coating |
| Eyecups | Twist-up |
| Included Accessories | Carrying case, neck strap, objective lens caps, eyepiece caps, instruction manual |
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Where to Buy
Check the latest price and availability for the KOWA BD III-XD 8x42mm on Amazon.
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