Leupold BX-1 McKenzie 12x50mm, Shadow Gray Hunting Binocular - 173790The Leupold 12x50 BX-1 McKenzie Binoculars feature phase-corrected BAK4 roof prisms and anti-reflection fully coated optics that work together to produce a versatile and capable optic with clear, high-contrast images and accurate color rendition. The 50mm objective lenses gather ample light, and the wide exit pupil delivers a bright view in challenging conditions such as the early morning and late evening. Complementing the optical performance are construction details that make these binoculars durable and comfortable to use. The lightweight and durable aluminum alloy chassis is protected by a gray rubberized armor that is textured for a non-slip grip. The optical tubes are nitrogen-filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme changes in temperatures or environmental conditions. A right-eye diopter adjustment and twist-up eyecups allow the binoculars to be customized to most people's needs and can be comfortably used with or without eyewear. For long-term glassing, the McKenzie is tripod mountable with an optional adapter.Optical PerformancePowerful 12x magnification reveals distant details50mm objective lenses improve light-gathering ability versus smaller objectives while helping to maintain a compact form factorRoof prism optical path ensures a low-profile design that is easy to holdBAK4 prisms deliver a round exit pupil and a crisp and clear image with limited edge distortionPhase-corrected prism coatings reduce internal interference to improve contrast, clarity, and resolutionAnti-reflection fully coated lenses maximize light transmission for bright and clear images with accurate color rendition242' field of view at 1000 yardsUse and HandlingClosed bridge configuration offers a stable platform for the internal focusing mechanismLarge center focus wheel is easy to manipulate in cold or wet conditions, or when wearing glovesRight-eye diopter adjustment enables users to compensate for optical prescription for sharper viewsTwist-up eyecups for comfortable use with or without eyewearTripod mountable with optional adapter for hands-free use to eliminate vibration and arm fatigueLong 13.7mm eye relief reduces eye strain for easier and more comfortable viewing4.2mm exit pupilConstruction DetailsLightweight and durable aluminum alloy chassisNitrogen-filled and O-ring sealed to be waterproof and resistant to internal fogging when moving through extreme changes in temperature and environmental conditionsShadow Gray rubberized armoring exterior protects against bumps and impactsErgonomically placed textured palm pads provide a non-slip, stable, and comfortable gripWeight: 28.5 ozPrism TypeRoofMagnification12xObjective Lens Diameter50 mmAngle of View4.6° (Actual)Field of View242' @ 1000 yd / 80.344 m @ 1000 mExit Pupil Diameter4.2 mmEye Relief13.7 mmFocus TypeCenterTripod MountYes (Adapter Optional)DimensionsLength: 6.7" / 17.0 cmWeight28.5 oz / 808.0 g