The Televid 25-50 Aspheric Eyepiece from Leica is a variable focal length wide-angle eyepiece for spotting scopes. The interchangeable bayonet system has an integrated, automatic eyepiece lock, securely mounting this accessory to your spotting scope. A rubber focus dial and rotating eyecup provide an ergonomic viewing experience, and supple feel. This world-class optical device is nitrogen-purged and waterproof to 17 ft (5 m), making this eyepiece ready to perform in a range of weather conditions.