The National Geographic 8x42 is a roof prism binocular with a magnification of 8x and an optical aperture of 42mm. A diopter adjustment allows diopter corrections up to +-2. A high-quality full coating on all glass elements reduces distracting reflections and improves light transmission and provides a high contrast particularly in bad light conditions. The binocular is built with a handy and stain-resistant rubber surface. A normal tripod connection allows us to fix it on a tripod for better observations. For better transport, a bag and a comfort strap are included in the delivery.