Alpen Pro 10x50mm Fixed Focus Wide Angle Binocular bring you exceptional value and great viewing power. This Alpen Binocular have the superior features demanded by today's dedicated sports optics users. The Alpen 345 Binocular is a Porro binocular, built with the time-tested Porro prism system. This Alpen Pro Binoculars feature a fixed focusing system that is always in focus beyond 75 feet. This durable outdoor binoculars is tripod-mountable and weigh a mere 22 ounces. The Alpen Pro 10x50mm Binoculars is protected from bumps, scratches and noisy movement by a rubber armored housing.