Pentax 9x28 A-Series AD WP Binocular

Pentax's 9x28 A-Series AD WP Binocular features an exciting transitional magnification that produces an enhanced viewing experience over a lower power without the visible hand-shake often associated with higher magnifications. The BAK4 roof prisms are phase-corrected to improve image contrast and enhance color rendition. All of the optics are anti-reflection fully multi-coated to maximize light transmission to produce the brightest views possible. To help cut weight, the housing is made of corrosion and impact-resistant fiberglass reinforced polycarbonate polymer. It is also temperature-resistant allowing for its use in extreme climates while reducing expansion and contraction wide temperature swings can cause which can make the optical components move out of collimation over time. Its optical tubes are nitrogen-filled and O-ring sealed so they can are submersible to 3.3', as well as fog proof in all weather conditions. Optical Performance 9x magnification 28mm objective lenses BAK4 roof prisms Phase corrected prism coatings enhance contrast and improve color rendition Anti-reflection fully multicoated optics 323.4' field of view at 1000 yards 50 angle of view Use and Handling Closed bridge configuration Knurled center focusing wheel Twist-up eyecups for use with or without eyewear 18mm eye relief, 3.1mm exit pupil Construction Details Lightweight fiberglass reinforced polycarbonate housing Housing is corrosion, temperature, and impact-resistant Nitrogen-fil