The small size of the Eterna makes it easy to take along on a vacation or an outdoor adventure. Don't worry about the weather. The Eterna is waterproof, fogproof, and built to last. Fully multi-coated optics optimize light transmission for bright views on cloudy days. 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.
Objective Lens Diameter
Field of View
260 feet/1000 yards
4.8 x 3.8 inches
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