The GPO PASSION™ ED 10x42 Binoculars (Deep Green) provide high-clarity optical observation designed for open-country scouting, nature observation, and long-range wildlife identification. Built on a lightweight magnesium alloy micro-bridge chassis with rubber armouring, these roof-prism binoculars feature Extra-low Dispersion (ED) objective lenses and GPObright™ proprietary multi-coatings that achieve 90% light transmission while minimising chromatic aberration. Measuring 145 mm (5.7 in) in length and weighing 26.0 oz (approx. 670 g), they combine rugged, fog-proof, nitrogen-purged waterproof performance with a 4.2 mm exit pupil and 16.0 mm eye relief for comfortable handheld glassing.

Key Features

• ED Optical System: Extra-low Dispersion glass combined with phase-coated BaK-4 Schmidt-Pechan roof prisms delivers crisp edge-to-edge detail and reduces colour fringing.
• High Light Transmission: Proprietary GPObright™ multi-coatings enable 90% light transmission for clear viewing in low-light twilight conditions.
• Durable Magnesium Chassis: Compact micro-bridge body with rubber armouring and robust aluminium twist-up eyecups ensures mechanical durability.
• Weatherproof Reliability: Fully waterproof and nitrogen-purged interior prevents internal fogging in severe weather environments.
• Tripod Adaptable: Includes standard 1/4"-20 front threading for stable mounting during extended glassing sessions.

Specifications

• Magnification: 10x
• Objective Lens Diameter: 42 mm
• Prism Type: Schmidt-Pechan roof prisms (BaK-4, phase-coated)
• Field of View: 340 ft @ 1,000 yd (113–114 m @ 1,000 m / approx. 6.5°)
• Exit Pupil: 4.2 mm
• Eye Relief: 16.0 mm
• Close Focus Distance: 8.2 ft (2.0 m)
• Length: 145 mm (5.7 in)
• Weight: 26.0 oz (approx. 670 g)

Who is the GPO Passion ED 10x42 for?

• Open-country and mountain hunters — Delivers 10x magnification combined with a 340 ft @ 1,000 yd field of view and a 26.0 oz carry weight, allowing hunters to scan expansive terrain on foot without excessive pack strain.
• Bird watchers and wildlife observers — Features an 8.2 ft close focus distance and 42 mm ED objective lenses to resolve fine feather and anatomical detail at near distances as effectively as distant perches.

Less suitable for: Prolonged observation in deep dusk or near-total darkness, where larger 50mm or 56mm objective binoculars with exit pupils exceeding 5.5 mm are superior, as well as users prone to hand tremors who require a lower-power 8x binocular or dedicated tripod-mounted optical setup for stable viewing.