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Description Material: plastic Colour: Black Overall dimensions: 97 * 105 * 50mm Magnification: 10 times Objective Diameter: 25mm Exit pupil distance: 20mm Close Focus Distance: 3M Field of view: 8.5 Focus Mode: notes Exit Pupil Diameter: 2.5MM Lens coating: FMC Broadband Green Film Eyepiece Coating: FMC Broadband Green Film Waterproof: Yes Fog: None Weather resistance: None Prism type: BAK4 . A tune from the show: two changes from the telescope tube until the left and right depending on the occasion of a circular field of view so far. Then two barrel exit pupil distance will be with the human eye pupil distance two consistent . B Focus: to emphasize the left eyepiece, the telescope's closed right eye rotation adjusting mechanism (handwheel or adjustment plate), and slowly adjust until the eye can see the target so far. Then adjust the right eyepiece and closed left eye turning the right eyepiece compensation adjustment wheel slowly adjusted to make straight the right eye to see the target. . C observation: the telescope to observe the target substantially aligned with the rotation of the adjustment mechanism while eyes will be able to quickly see the target. For the scene at different distances, simply by turning the adjustment mechanism can quickly see.