Designed for versatility and comfort, the Olivon 8×42 Barr & Stroud Sierra Binoculars deliver exceptional clarity, even in demanding environments. Featuring fully multi-coated lenses and BAK4 phase-corrected roof prisms, this optic ensures high-contrast images with true-to-life colour and brightness—ideal for birders, hikers, and nature observers alike.

With a wide 7.4° field of view (387 ft @ 1000 yds) and a spacious 5.2mm exit pupil, the 8×42 configuration offers a relaxed, immersive viewing experience. The binoculars focus as close as 6.6 feet, making them suitable for both distant and near-field observations. Centre focus control and ±4 diopter adjustment offer precise visual tuning, while the generous 18mm eye relief and twist-up eyecups provide comfort with or without glasses.

Constructed with smooth rubber armouring for a confident grip, the Sierra is waterproof to 5 feet and ready for use in unpredictable conditions. A tripod-adaptable chassis and included accessories round out this rugged yet refined optic.

• Magnification: 8x

• Objective Lens Diameter: 42mm

• Prism Type: BAK4 Roof, Phase-Coated

• Optical Coating: Fully Multicoated

• Field of View: 7.4° (387 ft @ 1000 yds)

• Eye Relief: 18mm

• Exit Pupil: 5.2mm

• Minimum Focus Distance: 6.6 ft (2 m)

• Interpupillary Range: 56 – 74mm

• Diopter Adjustment: ±4

• Weatherproofing: Waterproof to 5 ft (1.5 m) for 3 minutes

• Construction: Rubber-Armoured Body

• Tripod Adaptable: Yes (with optional adapter)

• Included Accessories: Neck strap, lens caps, carrying case