High contrast and high resolution thanks to ED glass ED (Extra-low Dispersion) glass corrects chromatic aberration that causes color fringing and provides a high-contrast, high-resolution image. Oil and water repellent coating Thanks to the oil- and water-repellent coating of the lens and eyepieces, fingerprints and other dirt can be easily wiped off. Locking system for diopter adjustment wheel The locking system for the diopter adjustment wheel prevents accidental adjustment of the wheel. Bright, clear and large field of view All lenses and prisms have multi-layer coating. The roof prisms feature a highly reflective dielectric multilayer coating on the prism and a phase-corrected coating. Together, they produce a bright field of view and lifelike color reproduction. The large apparent field of view* provides a spectacular nature experience. Waterproof (up to 1 meter for 10 minutes) and fogproof thanks to O-ring seals and nitrogen filling The binoculars feature a waterproof design and are filled with nitrogen to prevent fogging of the optical system. This makes them reliable companions even on snow-covered mountains, near water, in fields covered in dew, and during sudden changes in temperature and air pressure.