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Long Distance ED 8x42 Binocular Telescope For Outdoor Parameter: POWER 8 X ± 5% 10 X ± 5% OBJECTIVE DIAMETER Φ 42mm ± 1 mm Φ 42mm ± 1 mm FEILD ANGLE 7.3 ° ± 5% 6.5 ° ± 5% FIELD OF VIEW(at 1000m/at ...