The 12x25 ProStaff ATB Binocular from Nikon is a compact all-terrain optic that offers a weather-sealed housing and slip-resistant handling. Additionally, ProStaff ATB binoculars are equipped with a fully multicoated optical path that features BAK4 prism glass and aspherical eyepiece lenses. Nikon's Eco-Glass optics are made of environmentally-friendly lenses and prisms that don't contain lead or arsenic. This Porro binocular transmits detailed images with enhanced clarity and contrast—well-suited for birders in the park, sightseers on vacation and spectators at the ballgame. Complementing the image quality and nitrogen-filled housing are Turn-and-Slide eyecups and a 16mm eye relief, allowing the viewer to set a comfortable viewing distance even while wearing eyeglasses.