Count on this Brunton 50mm porro prism binocular to gather a lot of light. Fully multi-coated optics only increase the distant, bright views—especially important when observing planets and stars. The Eterna delivers classic performance with modern waterproof and fogproof protection. 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. FlatLight coatings.
||Enhances resolution and contrast through roof prisms.
||Optimize light transmission.
||Generally offer a rich depth of field, wide field of view, and three-dimensional image.
||Provides a secure, non-slip grip.
||Roll up and down for comfortable viewing with or without eyeglasses.
||Adjusts each binocular barrel independently.
||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.