Alpen Chisos ED 12x50mm Roof BK4 Prism Binocular Green 1212928. Featuring extra-low dispersion (ED) glass phase-coated BK4 prisms and fully multi-coated lenses these binoculars provide outstanding contrast and detail. The large 50mm objective lenses enhance brightness by gathering ample light ensuring vivid images even in low-light conditions. With a close focus of 8.2 feet users can observe intricate details of nearby subjects with ease. Built for rugged use the Chisos ED binoculars are waterproof fog-proof and feature a durable magnesium housing with a textured grip for secure handling. Twist-up eyecups and a generous 16mm eye relief add to the comfort making these binoculars a reliable companion for any outdoor adventure. Specifications for Alpen Alpen Chisos Binoculars: Manufacturer: Alpen Color: Green Features of Alpen Alpen Chisos Binoculars: 12x magnification for detailed long-range viewing 50mm objective lenses for superior light transmission ED glass for enhanced color accuracy and reduced chromatic aberration Waterproof and nitrogen-purged for fog-proof performance BK4 roof prism system with PXA phase coating for sharp contrast Fully multi-coated (FMC) optics for maximum brightness and clarity Field of view: 263 feet at 1000 yards Apparent field of view: 8.2 degrees Close focus: 8.2 feet for detailed nearby observations 16mm eye relief for comfortable extended use 4.2mm exit pupil for optimal brightness Twist-up eyecups for customizable eye positioning Durable magnesium housing with textured grip Lightweight design at 907g Lifetime warranty with registration Package Contents: Alpen Alpen Chisos Binoculars