Barr & Stroud Series 4 10×42 ED Binoculars (70522)

Sharp, Bright, Weatherproof Optics with Classic Handling

The Barr & Stroud Series 4 10×42 ED binoculars combine rugged field-ready construction with high-performance optics designed to deliver crisp, high-contrast images with excellent colour fidelity. Built with ED (Extra Low Dispersion) glass, fully multi-coated optics, and BaK-4 phase-coated prisms, they minimise chromatic aberration and maintain clarity even in demanding light.

With a modern open-bridge design that echoes the feel of classic Barr & Stroud binoculars, the Series 4 offers superb ergonomics, a secure grip (even with gloves), and reduced carry weight—ideal for hikers, wildlife observers, travellers, and anyone needing dependable optics in all weather.

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Key Features

• ED glass optics for reduced chromatic aberration and sharper, cleaner detail

• Open-bridge roof prism design for comfortable, secure handling and weight savings

• BaK-4 phase-coated prisms for improved resolution and image brightness

• Fully multi-coated optics for high light transmission and contrast-rich viewing

• Nitrogen filled to prevent internal fogging in cold or wet conditions

• Waterproof construction (rated to 1.5 m for 3 minutes) for confident all-weather use

• Rubber armoured body to protect against knocks and impacts

• Smooth centre focus wheel with rapid focus from close focus to infinity in under one turn

• Metal twist-up eyecups with rubber coating for comfort with or without spectacles

• Tripod adaptor bush for stable, extended observation

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Built for Hard Use

Designed to perform in real-world conditions, the Series 4 features weatherproof sealing and nitrogen purging to keep moisture out and prevent internal fogging. The open-bridge chassis improves grip and balance, making long sessions more comfortable—especially when tracking fast-moving wildlife or action at distance.

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What’s in the Box

• Carrying case

• Rain guards

• Tethered lens caps

• Deluxe strap

• Lens cleaning cloth

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Specifications

Model: 10×42 ED
Magnification: 10×
Objective Lens Diameter: 42 mm
Field of View @ 1000 m: 98 m
Angular Field of View: 5.6°
Close Focus: 2 m
Eye Relief: 15.2 mm
Exit Pupil Diameter: 4.2 mm
Waterproof: Yes (1.5 m for 3 minutes)
Nitrogen Filled: Yes
Prism Design: Roof
Prism Glass Type: BaK-4
Phase Coated Prisms: Yes
ED Optics: Yes
Fully Multi-Coated Optics: Yes
Water Repellent Lens Coating: No
Body Material: Polycarbonate
Open-Bridge Design: Yes
Adjustable Eyecups: Twist-up
Focusing System: Centre
Interpupillary Distance: 56–74 mm
Dioptric Compensation Range: +4 to -4
Tripod Adaptor Bush: Yes
Dimensions: 154 × 126 × 52 mm
Weight: 726 g