High-quality, waterproof, nitrogen-filled Helios observation binoculars with single eyepiece focusing, developed for terrestrial observation over medium to long distances and for astronomy. The shockproof housing consists of a very robust but light magnesium-aluminum construction. It incorporates BAK-4 prisms and a fully multi-coated optical system. The high-resolution optical system consists of lenses with high transmission and prism coatings that allow 85% of the incident light to pass and produce a flat, distortion-free image. The eyepiece design provides oversized lenses and a large 20mm eye relief. The eyepieces are equipped with foldable rubber eyecups for comfortable viewing even for people who wear glasses. The binoculars are equipped with a tripod connection. The case is dark green and black rubber armored. The Helios binoculars come in a soft storage case with a padded carrying strap and protective lens caps. Scope of delivery: 15×70 binoculars, dust caps, case! Power supply and batteries are not included!