Engineered for clarity, built for the outdoors—the Olivon 10×42 Barr & Stroud Sierra Binoculars deliver crisp, wide-angle views through a rugged, weather-sealed design. Outfitted with fully multicoated lenses and phase-corrected BAK4 roof prisms, this optic delivers vivid, high-contrast images with excellent color fidelity and light transmission.

Its 10x magnification and wide 7° angular field of view (370 ft @ 1000 yds) offer both detail and spacious perspective. With a close focus distance of just 6.6 ft and a 4mm exit pupil, it’s well-suited for everything from distant landscapes to nearby wildlife encounters. The ±4 diopter and center focus wheel ensure pinpoint sharpness, while the 14mm eye relief and twist-up eyecups offer comfort for all users—including those with glasses.

Encased in rubberized armoring for a secure grip, the Sierra is waterproof to 5 feet and tripod-adaptable with an optional mount. Whether hiking, birding, or exploring under uncertain skies, this binocular is made to keep up with your adventures.

• Magnification: 10x

• Objective Lens Diameter: 42mm

• Prism Type: BAK4 Roof, Phase-Coated

• Optical Coating: Fully Multicoated

• Field of View: 7° (370 ft @ 1000 yds)

• Eye Relief: 14mm

• Exit Pupil: 4mm

• 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-Armored Body

• Tripod Adaptable: Yes (with optional adapter)

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