Zeiss's black 10x42 Terra ED Binocular combines SCHOTT ED glass elements and a compact weather-sealed housing to create a multi-purpose optic that delivers the image quality and streamlined silhouette for birders and hunters seeking a budget-friendly set of glasses that do not sacrifice twilight performance or functionality. At the core of Terra ED are fully multicoated SCHOTT ED glass lenses designed to maximize light transmission and render contrast-rich images. They also boast the ability to focus down to less than 6 ft, allowing observers to get up close to the bird or other nearby subject of interest Thanks to a space-saving Schmidt-Pechan roof prism design and lightweight composite housing, this binocular weighs just a pound and a half.
Complementing the high-transmission optical path and modest form factor, the Terra ED has a nitrogen-filled housing that provides fogproof performance and has been tested to withstand submersion to a depth of approximately 3 ft. This water and fogproof performance, coupled with a broad operating temperature range, enables these binoculars to stand up to almost any outdoor observational situation. A textured center focus wheel and twist-up rubber eyecups supply additional handling features that enhance the overall ergonomics and help make it a full-featured binocular for close to mid-range use.