Observing with the new Explore Scientific BT Series giant binoculars is a truly stunning experience whether you are targeting wispy nebulae in the inky night sky, exploring the natural beauty of distant landscapes or checking out ships on the horizon. Available in apertures of 70mm, 82mm, 100mm and 120mm, these binoculars are essentially double refractor telescopes that provide both far-reaching views and a comfortable observing experience. The optics are fully multi-coated for excellent contrast and color, and each binocular comes with a pair of premium Explore Scientific waterproof 62° eyepieces that add to the superior viewing quality. For all-weather performance, the optical tubes are sealed and purged with nitrogen to create an internal environment that is both waterproof and fogproof. Extendable caps minimize condensation on the lenses and provide additional protection against stray light interference. For more information, please click the image above or the yellow box below.