RSPB Sparrowhawk ED 10x42 Binoculars

The RSPB Sparrowhawk ED 10x42 binoculars (product 55161617842551) deliver 10x magnification through a 42mm objective lens. That pairing gives you a 4.2mm exit pupil and a field of view of 115m at 1000m solid for picking out birds at distance without losing situational awareness. These weigh just 700g thanks to a premium magnesium chassis.

The optics are built around ED glass objective lenses which cut chromatic aberration sharply. The Schmidt-Pechan roof prism system uses dielectric coated phase-corrected BAK4 prisms for high light transmission. Fully multicoated optics across all air-to-glass surfaces push brightness and colour accuracy well above standard glass.

The magnesium body is nitrogen filled and fully waterproof so internal fogging is not a concern in wet or cold conditions. At 700g it sits comfortably in hand for extended sessions. Eye relief is 17.8mm which works well for spectacle wearers. Field flattening lenses keep edge sharpness consistent across the whole image.

The RSPB Sparrowhawk ED 10x42 backs its performance with a 10-year manufacturer warranty. ED glass, dielectric prism coatings, magnesium build and full waterproofing make this a serious tool for birdwatching and wildlife observation in any weather.

The 10x42 configuration means 10x magnification through a 42mm objective lens giving a 4.2mm exit pupil. ED glass reduces chromatic aberration so colour fringing at high contrast edges is minimised. The Schmidt-Pechan roof prism uses BAK4 glass with dielectric coatings and phase correction to recover light that roof prisms typically lose. Fully multicoated surfaces on every air-to-glass element push overall light transmission higher. Field flattening lenses keep the image sharp across the full 6.6-degree field of view.

The chassis is premium magnesium alloy keeping weight to 700g. The objective lenses use ED extra-low dispersion glass. The Schmidt-Pechan roof prisms are BAK4 glass with dielectric phase-corrected coatings. All external optical surfaces carry full multicoatings. The body is sealed and nitrogen filled for waterproof fogproof performance.

Use a blower or soft brush before wiping lenses with a clean microfibre cloth. Store in the supplied case when not in use and keep the strap attached. Store in a dry place away from heat. Check the hinge tension and eyecups regularly. Proper care keeps the 10-year warranty valid.