Barr & Stroud Sierra 10 x 50 Binoculars 70176

Barr & Stroud Sierra 10x50 Binoculars – Bright, Powerful Optics Built for the Outdoors

Maximum brightness and clarity – the perfect choice when performance matters most.

The Barr & Stroud Sierra 10x50 binoculars are the powerhouse of the Sierra range. Designed for users who want serious magnification with outstanding low-light performance, these binoculars combine wide objective lenses with rugged build quality and premium optics – all without a premium price tag. If you're looking for a pair of high-performance binoculars for nature observation, birdwatching, or general outdoor use, the Sierra 10x50 delivers in every way.

Bright Optics with 50mm Objective Lenses

Larger 50mm objective lenses allow significantly more light into the optical system, making the 10x50 model ideal for early morning, dusk, and overcast conditions. Whether you’re scanning distant landscapes or tracking wildlife in woodland shade, you’ll enjoy brighter, sharper images with improved contrast and detail.

The 10x magnification brings distant subjects closer without sacrificing stability or clarity, offering a perfect balance for long-range viewing.

Durable, Weatherproof Construction

The Sierra 10x50 is built for real-world use in all conditions. It is fully waterproof up to 1.5 metres and nitrogen-filled to prevent internal fogging. The robust polycarbonate body is rubber-armoured for added shock resistance and secure grip, even in wet conditions.

From rain-soaked walks to rugged trails, these binoculars are made to be used — not just admired.

Premium Optical Performance

The Sierra series is known for its exceptional optics. With Fully Multi-Coated lenses and phase-corrected BAK-4 roof prisms, the 10x50 model delivers high-resolution, colour-accurate images with excellent edge-to-edge sharpness. Even in low-light scenarios, these binoculars maintain image brightness and contrast, outperforming many similarly priced models.

Smooth, Fast Focusing and Comfortable Design

The centre focus wheel offers smooth, precise control, allowing quick adjustments from close focus (2.5 metres) to infinity in less than one full turn. The twist-up metal eyecups with rubber coating and generous 17.5mm eye relief ensure long-lasting comfort for users with or without spectacles.

Key Features

• 10x magnification for detailed long-range viewing

• 50mm objective lenses for enhanced brightness in low light

• Fully Multi-Coated optics for improved light transmission and clarity

• Phase-coated BAK-4 prisms for colour fidelity and sharp contrast

• Waterproof to 1.5 metres and nitrogen-filled – fog-free and weatherproof

• Durable polycarbonate body with rubber armour

• Close focus: 2.5 metres

• Twist-up eyecups – glasses-friendly design

• Tripod adaptable for hands-free stability

• 10-year manufacturer’s warranty

Technical Specifications

• Field of View at 1000m: 101m

• Angular Field of View: 5.8°

• Close Focus: 2.5m

• Eye Relief: 17.5mm

• Exit Pupil Diameter: 5mm

• Interpupillary Distance: 56–74mm

• Dioptric Compensation Range: +4 to -4

• Prism Type: Roof (BAK-4)

• Dimensions: 162 x 131 x 57mm

• Weight: 780g

• Body Material: Polycarbonate

• Tripod Adaptor Bush: Yes

What's in the Box

• Barr & Stroud Sierra 10x50 Binoculars

• Padded carry case

• Tethered lens caps

• Rain guards

• Neck strap

• Lens cleaning cloth

• Instruction manual

If you need binoculars that offer high magnification with superior brightness and rugged build, the Barr & Stroud Sierra 10x50 is your go-to choice. Ideal for wildlife watchers, adventurers, and anyone who values optical performance in the great outdoors – these binoculars are made to impress, in every condition.