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.
||Enhances resolution and contrast through roof prisms.
||Optimize light transmission.
||Appreciated for a streamlined shape and durability.
||Provides a secure, non-slip grip.
||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
||Can be mounted using standard ¼-inch threading. Adapter sold separately.
||Optics are sealed with O-rings to prevent moisture, dust, and debris from getting inside the binocular.
||Barrels are filled with nitrogen gas to inhibit internal fogging.