Brunton Eterna Monocular 6x30 Developed for its convenience and size, the Eterna Monocular takes ergonomics a few steps further with a palm-fitting grip and a slender shape. A design worthy of examination, our Monocular is so popular it’s even appeared in a Hollywood action film. If it wasn’t for looks alone, it may have been the Emerald Fire™ multi-coating or the waterproof, fogproof appeal that caught producers’ eyes. Spy on a superhero, and see for yourself why the Monocular is such an attractive investment.