The GPO Passion 10x56 ED is an Abbe-König roof prism binocular engineered for long-range identification and low-light observation. Featuring extra-low dispersion (ED) glass elements paired with proprietary GPObright multi-coatings, the optical system delivers 92% light transmission across the visual spectrum. Built on a nitrogen-purged magnesium alloy chassis with rubber armouring, this handheld optic is fully waterproof and fog-proof for reliable operation in challenging weather and low-visibility field environments such as dawn, dusk, and heavily overcast conditions.

Key Features

  • Abbe-König Prism System: Large optical prisms provide a straight-line optical path to achieve 92% daylight and low-light transmission.
  • ED Optical Elements: Extra-low dispersion lenses minimise chromatic aberration to preserve colour rendition and edge-to-edge sharpness.
  • Low-Light Optical Configuration: Combines 10x magnification with large 56 mm objective lenses, yielding a 5.6 mm exit pupil and a 23.66 twilight factor.
  • Magnesium Alloy Chassis: Rugged, nitrogen-purged housing with aluminium eyecup tubes provides structural rigidity while sealing internal components against moisture and fog.
  • Wide Field of View: Offers a 114 m field of view at 1,000 m (approx. 6.5°) paired with 16 mm of eye relief for comfortable glassing.
  • Tripod Adaptable: Integrated front-thread interface allows mounting to standard binocular tripod adapters for extended static viewing sessions.

Specifications

  • Magnification: 10x
  • Objective Lens Diameter: 56 mm
  • Prism Type: Abbe-König roof prism
  • Lens Coatings: GPObright multi-coating with ED glass
  • Light Transmission: 92%
  • Exit Pupil: 5.6 mm
  • Twilight Factor: 23.66
  • Field of View: 114 m at 1,000 m
  • Eye Relief: 16 mm
  • Close Focus Distance: 2.5 m to 3.0 m
  • Interpupillary Distance (IPD): 57–75 mm
  • Dimensions: 192 mm (L) × 158 mm (W) × 67 mm (H)
  • Weight: 1,170 g (41.3 oz)
  • Chassis Material: Magnesium alloy with rubber armour

Who is the GPO Passion 10x56 ED for?

  • Low-light and twilight hunters — 92% light transmission paired with a 56 mm objective lens diameter and 5.6 mm exit pupil provides the optical brightness required to resolve game in deep twilight, dawn, or under heavy canopy cover where standard optics fail.
  • High-seat and blind wildlife observers — 10x magnification combined with an Abbe-König prism system delivers high resolving power at long distances during stationary observation, supported by a 1,170 g magnesium chassis compatible with standard tripod adapters for sustained viewing.

Less suitable for: Active mobile hunters requiring an optic under 800 g for continuous all-day mountain carry, where a compact 8x42 or 10x42 binocular is better suited; or close-range macro and insect observers requiring focus distances inside the 2.5 m minimum threshold, who are better served by a dedicated close-focus optic.

SKU GPO40649LP
Model # B420
Brand Gpo
Shipping Weight 1.0000kg

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