Designed to deliver power and performance, the Alpen Optics 10x42 Rainier ED HD Binoculars is the ideal optic for hunters, birders, and outdoor enthusiasts who glass at long range and require accurate colors and crisp clarity in all light conditions. To withstand the rigors of daily outdoor use, the optical tubes are nitrogen filled and O-ring sealed to be waterproof and resistant to internal fogging if the weather turns or the binoculars take an accidental spill in a creek or puddle.

The Rainier line features anti-reflection fully multicoated extra-low dispersion (ED) glass lenses that complement the phase-corrected and dielectric coated BAK roof prisms. This combination of glass, prisms, and coatings produce Alpen's high-definition optical system that delivers bright, clear, high-contrast views with accurate color rendition free from distortion or color fringing across its wide field of view. The 42mm objectives gather all the light needed to keep views crisp and bright in challenging conditions, such as at dawn and dusk, without being overly bulky or cumbersome.