The RSPB Harrier X is the latest addition to the RSPB range of top-quality binoculars. A host of image-enhancing technology is contained in a stylish, compact body with shock-resistant rubber armour, and thumb-holds for comfort and grip. Super High Reflective dielectric coated prisms allow for a bright, crystal-clear image. Phase correction and the ED glass will work together to all but eliminate colour fringing. These fully waterproof optics offer an ultra close focusing distance for viewing butterflies and insects in incredible detail, while the impressive field of view makes is easy to find and keep fast-moving birds in view. The twist down eyecups for spectacle wearers have three settings, so they can be more finely adjusted to each individual.