Leupold BX-1 McKenzie 10x42mm, Shadow Gray Hunting Binocular - 173788The 10x42 BX-1 McKenzie Binoculars from Leupold feature phase-corrected BAK4 roof prisms and anti-reflection fully multi-coated optics that work together to produce a versatile and capable optic with bright and clear high-contrast images and accurate color rendition. Coupled with the optical features are 42mm diameter objectives that boost its light-gathering ability, without the bulk and weight of larger models, for easy use in challenging conditions such as the early morning and late evening. The combination of optics and objectives make the McKenzie ideally suited for most long-range needs and outdoor activities from hunting, to birding, to sporting events. 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 Performance10x magnification allows for detailed observations of distant subjects42mm 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 multi-coated lenses maximize light transmission for bright and clear images with accurate color renditionApparent angle of view approaches wide angle to minimize the appearance of distracting hand shake that is common when holding high-power optics305' 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 views56-74mm interpupillary adjustment range allows easy use by wide variety of peopleTwist-up eyecups for comfortable use with or without eyewearTripod mountable with optional adapter for hands-free use to eliminate vibration and arm fatigue13.7mm eye relief4.2mm 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: 22 ouncesPrism TypeRoofMagnification10xObjective Lens Diameter42mmAngle of View5.8° (actual)Field of View305.0' @ 1000 yd / 101.26 m @ 1000 mMinimum Focus Distance10' / 3 mExit Pupil Diameter4.2 mmEye Relief13.7 mmInterpupillary Adjustment56.0 - 74.0 mm / 2.2 - 2.9"Dioptric CorrectionNot Specified by ManufacturerFocus TypeCenterTripod MountYes (Adapter Optional)DimensionsLength: 5.8" / 14.7 cmWeight22.0 oz / 624.0 g