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• Marine Binoculars 10x50 with Rangefinder Compass for Adults FMC Lens IPX7 Waterproof Telescope for Birdwatching Hunting Boating About this item 【Professional Marine Binoculars】10X50 binoculars provides 50mm huge aim lense and 22mm eye relief, which offer a more large view and cozy statement 6 exit pupil, and discipline of view is 396 ft at 1000 yards / 132 meters at one thousand meters With ±5 diopter left and right diopter ring, You can alter the distance for higher viewing without glasses and for tremendous focusing 【Binoculars with Rangefinder Compass】Night imaginative and prescient binoculars illuminated compass built-in for course location, with an inside rangefinder for calculate the gap and size of the thing at the left eyepiece immediately The ruler and the compass illuminated by means of the light button, provides the utmost brightness of the picture even in low light conditions(not totally dark) 【High Quality Optic System】High refractive index BAK4 Porro Prism eliminates the stray light and improves colour replica to 99% Green FMC anti-reflective coating reduces the mirrored light in the objective lens and improves gentle transmission, picture brightness and image sharpness 【IPX7 Waterproof Binoculars】This binocular come with Nitrogen-filled waterproof, fogproof and Anti-shake design O-ring sealed for total waterproof defense and waft on water so no worries if dropped into the water; Dry nitrogen-purged and sealed to prevent fogging and moisture harm in all climatic conditions 【Binoculars with Harness Strap】Wearing the harness strap is essentially the most completely happy strategy to carry binoculars for many years It can reduce the weight of the binoculars on your shoulders for more comfy viewing Idea for Outdoor Activities, Hunting, Bird Watching, Travel, Boating, Target Shooting Specifications: Magnification: 10x Objective lens: 50mm Field of View: 396feet at one thousand yards Prism System: Porro Coating:FMC Prism Glass: BaK-4 Reticle: Internal rangefinder Compass constructed in:Yes Eyecups: Fold Down Water/Fog Proof: Yes Tripod Adaptable: Yes Weight : 2 lbs three Colors For your desire The follow is a inexperienced No compass genre How to apply the rangefinder? Formula ranging method (Note: 1 actual peak of the known object 2 unit:meter) There are vertical scale and horizontal scale on the coordinates The unit of small grid is zero density, and the unit of huge grid is 1 density The calculation components for distance measurement is: Distance(m) = Target Height(m) * 100 / The density of the target in coordinates Example: As proven in the picture, the height of the sailboats is set five meters, and the height measured at the scale is three (Turn the focusing wheel till the item can be viewed cleary) 5m * 100 /3 = 167m 2 Rangefinder measurement formulation (Note: 1 precise peak of the known object 2 unit:meter) 1 the focusing wheel until the article can be considered clearly 2 the horizontal baseline of the coordinates with the base line of the object, and measure the height and density of the object(as the image shows) 3 the measuring circle, align the arrow at the position where the density scale is 3, and the remark distance is about one hundred sixty meters consistent with the object&;s height of 5 meters Package Includes 1 x Binoculars 1 x Carrying Bag 1 x Harness Strap 1 x Eyepiece Cap 2 x Objective Lens Cap 2 x LR936/AG,cell batteries(Including the Binoculars) 1 x Instruction 1 x Color Box

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