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Model BSP604 Specification 12-36x60 15-45x60 20-60x60 Magnification 12x - 36x 15x - 45x 20x - 60x Obj.lens (mm) 60 60 60 Angle 3.0°-1.5° 2.3°-1.1° 1.7°-0.85° Field of View at 1000m 52 - 26 40 - 20 30 ...