Ideal for birdwatching, these stylish high quality, rubber armoured, modern open-hinge models combine light weight with excellent optical performance. Feature high-index BaK-4 prisms and fully broadband multi-coated optics. O-ring sealed and nitrogen filled for waterproof, fog-free performance. Features an advanced patented click-lock dioptric adjustment integrated in the focusing wheel. Twist-up eyecups for spectacle wearers. Eye relief is 18mm and 15mm respectively (8x42 & 10x42 models). Supplied with neckstrap and case. Colour/Material: Black Rubber