Experience vastly superior optical quality Not only are they offered at a value price, Leupolds BX-1 McKenzie Binoculars are a high-end combination of elite optical performance and rugged reliability. The proprietary Twilight Light Management System delivers bright images, even during low-light conditions like dusk and dawn. The unique prism design, premium optical clarity and edge-to-edge clarity combine to deliver jaw-dropping images and colors. Precision focus adjustment is quick and easy to use. High-impact aluminum housing with textured armor withstands rough treatment. Ergonomic design and twist-up eyecups keep viewing comfortable. Waterproof and fogproof. Tripod adapter. Leupold Full Lifetime Guarantee. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Full-Size.