The Barr & Stroud Sprite 20 x 50 FMC Monocular is waterproof and features a rugged armoured construction for years of performance. It is designed to be used single handed or on a tripod with equal ease. It features a soft rubber eyecup, which enables the monocular to be used with or without spectacles without damaging them. All Sprite monocular feature BaK-4 prisms and fully-coated lenses to provide optical performance. It is manufactured from lightweight polycarbonate, which reduces overall weight.