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The black 11x45 Eterna Binocular from Brunton is a lightweight yet durable multi-purpose binocular designed for a wide range of outdoor glassing tasks. Fully multicoated optics and phase-corrected BAK4 prisms transmit bright images that are as rich in detail as they are in contrast. This model of the Eterna series is configured with 11x magnification, ideal for mid-range applications. A long eye relief, ergonomic composite body armor, and weatherproof construction make the Eterna a full-featured binocular ready for years of adventures. Brunton Outdoor Group has been designing and manufacturing outdoor sporting equipment since 1894; whether you are a bird watcher, hunter, or hiker, Brunton has been making gear for nature enthusiasts like you for over a century.
Phase-Corrected BAK4 Roof Prisms
Phase-aligning and highly reflective AL coatings enable the prisms to evenly transmit color across the visible spectrum. The resulting images pop with detail and lifelike saturation. Phase-correcting coatings also enhance image clarity and eliminate the distracting color fringing common in lower quality optics.
Fully Multicoated Optics
Brunton's proprietary Emerald Fire multilayer lens coatings minimize reflections within the optical channels and maximize contrast of transmitted images.
Nitrogen purged and o-ring sealed housing protects the optics from fogging in harsh weather. Even in driving rain and suffocating humidity, the rugged construction ensures that the Eterna binocular will continue to display bright and clear images.
Multi-step twist-up rubber eyecups click in place and allow observers to optimize the eye relief and field of view.
An optional tripod adapter enables secure mounting to a tripod, monopod, or window mount. This option will prove useful during extended-duration activities like bird watching and hunting.