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Conquering long distances is a specialty of the Brunton Eterna 51mm objective lens binocular. The benefits of big glass are often overshadowed by an enormous weight—not a problem with the Eterna. Fully multi-coated optics optimize the Eterna's light transmission for bright views on cloudy days. The Eterna is waterproof, fogproof, and built to last. Brunton covers the Eterna with a limited lifetime warranty.
|Fully Multi-coated Lenses||Increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. Emerald Fire™ coatings.|
|Phase Correction||Enhances resolution and contrast through roof prisms.|
|BaK-4 Prisms||Optimize light transmission.|
|Roof Prisms||Appreciated for a streamlined shape and durability.|
|Rubber Armoring||Provides a secure, non-slip grip.|
|Multi-position Eyecups||Twist up and down for comfortable viewing with or without eyeglasses.|
|Center Focus Wheel||Adjusts both binocular barrels at the same time.|
|Right Eye Diopter||Adjusts for differences in a user's eyes. Located by the right eyepiece|
|Tripod Adaptable||Can be mounted using standard ¼-inch threading. Adapter sold separately.|
|Waterproof||Optics are sealed with O-rings to prevent moisture, dust, and debris from getting inside the binocular.|
|Fogproof||Barrels are filled with nitrogen gas to inhibit internal fogging.|
|Objective Lens Diameter||51 mm|
|Field of View||200 feet/1000 yards|
|Eye Relief||15.0 mm|
|Close Focus||11.0 feet|
|Dimensions (HxW)||6.7 x 5.2 inches|
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