RSPB Buzzard 8x42 ED Binoculars

The RSPB Buzzard 8x42 ED Binoculars (product 54901955723639) deliver an 8x magnification paired with a 42mm objective lens. That combination gives you a wide 142m field of view at 1000m with an exit pupil of 5.25mm excellent for tracking birds in flight or scanning woodland edges in variable light. The 8.1-degree angular field of view is generous for this class.

ED (extra-low dispersion) glass sits at the heart of the optical system. Phase-coated roof prisms with dielectric coatings push light transmission to high levels. The result is sharp, colour-accurate images with minimal chromatic aberration. Field flattening lenses keep the image crisp right to the edge of the view not just the centre.

The body is fully waterproof and nitrogen-filled to prevent internal fogging in cold or wet conditions. Eye relief is 18.4mm which suits spectacle wearers well. The focus system is central wheel with dioptre adjustment for individual eye correction. Supplied with strap, case, objective caps and rainguard.

A 10-year warranty backs the whole package. ED glass, phase-coated prisms, field flattening lenses and solid weather sealing make these a serious birdwatching tool at a competitive level.

The 8x42 pairing gives a 5.25mm exit pupil good for low light use at dawn and dusk. ED glass cuts chromatic aberration so colour fringing is minimal at high contrast edges. Phase-coated roof prisms correct the light wave phase shift that standard roof prisms introduce, boosting contrast noticeably. Dielectric coatings on the prism faces push reflectivity above 99% for maximum brightness. Field flattening lenses correct field curvature so sharpness holds to the very edge of the 142m field of view.

Body material is not specified in the product data. The optical system uses ED extra-low dispersion glass elements and roof prisms with phase and dielectric coatings. The body is sealed and nitrogen-filled for full waterproofing. An exterior rubber armouring is standard on this class of binocular but is not explicitly confirmed in the reference data.

Clean lenses with a blower brush first then a microfibre cloth and optical cleaning fluid only. Store in the supplied case when not in use. Keep the strap attached to avoid drops. Store dry and away from extreme heat. Check the hinge tension periodically. Warranty requires normal careful use and proof of purchase.