RSPB HDX 10x42 Binoculars

The RSPB HDX 10x42 Binoculars (product 49569000096051) deliver 10x magnification through a 42mm objective lens. That pairing gives you a 113m field of view at 1000m and an exit pupil of 4.2mm solid performance for birdwatching and wildlife watching in good to moderate light. At 660g they are one of the lightest 42mm roof prism binoculars available and the compact body with a narrow bridge lets you hold them comfortably in one hand.

The optics use ED glass objective lenses to reduce chromatic aberration and keep colour accurate. Phase coated roof prisms combined with SHR (super high reflective) coatings push contrast and clarity well above standard binoculars. Fully multicoated optics across all air-to-glass surfaces maximise light transmission for sharper brighter images.

The body is nitrogen filled and fully waterproof and fogproof. Shock resistant rubber armouring protects against knocks. Internal focusing with a close focus of just 2 - 2.5m makes them excellent for close-range subjects. Eye relief is 15.2mm. The ergonomic design keeps handling comfortable over long sessions.

A 10-year manufacturer warranty backs the build. Wide field of view, class-leading coatings, ultra-lightweight construction and genuine close focus capability make these a strong choice for serious birdwatchers.

The RSPB HDX 10x42 uses a roof prism design with ED glass objectives to cut chromatic aberration. Phase correction coatings on the prisms correct the light path split caused by the roof design. SHR (super high reflective) coatings then maximise reflectivity inside the prism to boost light throughput. Fully multicoated outer lenses reduce surface reflections. The 42mm objective divided by 10x magnification gives a 4.2mm exit pupil workable in low light. The 6.5° angular field of view translates to 113m at 1000m.

The body is built for low weight and uses shock resistant rubber armouring over the chassis. ED glass is used in the objective lenses to control colour fringing. Roof prisms carry phase correction and SHR coatings. The sealed construction is nitrogen filled to prevent internal fogging and moisture ingress.

Use a blower brush then a microfibre cloth to clean lenses. Never use household cleaners on coated glass. Store in the supplied case in a dry place. Check the hinge tension and eyecup condition regularly. The 10-year warranty requires the binoculars to be kept free from misuse and physical damage.