The GPO PASSION™ SD 10x34 is a compact roof-prism binocular engineered for mobile observation and open-country scouting. Featuring GPO’s Substantial Definition (SD) optical glass, GPObright™ fully multi-coated lenses, and dielectric-coated Schmidt-Pechan BAK-4 prisms, it delivers approximately 88% light transmission. Built on a lightweight magnesium micro-bridge chassis wrapped in non-slip rubber armour, this optic measures 130 mm in length and weighs approximately 473 g, offering a portable alternative to standard full-sized hunting optics without requiring electronic power.

Key Features

• Optical System: SD glass elements paired with dielectric-coated BAK-4 roof prisms provide a 103 m to 104.2 m field of view at 1,000 m (314 ft at 1,000 yd).
• Chassis Construction: Magnesium micro-bridge design protected by durable rubber armouring for impact resistance and secure handling.
• Weatherproof Reliability: Nitrogen-purged internal housing and fully sealed construction prevent internal fogging and resist water ingress.
• Viewing Comfort: Features 16.0 mm of eye relief with twist-up rotating eyecups, an interpupillary adjustment range of 56 mm to 76 mm, and a ±5 dpt dioptric compensation range.
• Mounting Interface: Integrated front standard thread allows direct connection to tripod adapters for stationary glassing.

Technical Specifications

• Magnification: 10x
• Objective Lens Diameter: 34 mm
• Exit Pupil: 3.4 mm
• Close Focus Distance: 3.0 m (9.8 ft)
• Dimensions: 130 mm (L) × 126 mm (W) × 45 mm (H)
• Weight: ~473 g (16.7–17.2 oz)
• Prism Type: Schmidt-Pechan (Roof Prism)
• Light Transmission: ~88%

Who is the GPO PASSION SD 10x34 for?

• Mobile Backcountry Hunters — 473 g total weight and a compact 34 mm objective format allow this hunting binocular to be carried all day on a chest harness across steep terrain without inducing neck strain, while 10x magnification provides target identification across open paddocks and valleys at distances from 300 m to beyond 1,000 m.
• Weight-Conscious Hikers and Nature Observers — 10x optical magnification combined with a 3.0 m close-focus limit enables detailed observation of distant wildlife and mid-range subjects, all packed into a compact 130 mm long chassis that fits easily into daypacks.
• Safari and Travel Observers — 3.4 mm exit pupil and fully multi-coated SD glass provide clear daytime image resolution in a compact roof-prism binocular that packs easily into carry-on luggage.

Less suitable for: Deep dawn, dusk, or nocturnal viewing where the 3.4 mm exit pupil and 34 mm objectives restrict light intake (larger 8x42, 10x42, or 8x56 binoculars are better suited), subjects closer than the 3.0 m minimum focus limit, or prolonged stationary glassing sessions where high-magnification hand tremors necessitate an 8x magnification optic or dedicated tripod-mounted observation setup.