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💕Features:💕Seiko manufacturing Miniature high definition telescope.💕Ratio: 8 times. Caliber: 20mm.💕object diameter: 20MM💕field angle]: 5.5 degrees💕Kilometer horizon: 96M/1000M💕Exit pupil diameter: 2.5MM💕Exit pupil distance: 10.3MM💕Last focusing distance]: 5M💕Dimensions: length 75x diameter 24mm thickness 36mm💕Prism system: Paul prism system.💕Lens: an optical lens.💕Optical coating: FMC full wideband green film.💕Eye mask type: cover the eye mask, suitable for myopia and non - myopia.💕Included:💕1 x 8x20 Monocular Telescope💕1 x Cleaning Cloth💕1 x Sling+ Storage Package