Binger 11x70 astronomical binoculars waterproof BAK 4 prism FMC HD definition

Description

Features:
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100% waterproof nitrogen filled
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BAK 4 prism
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Fully multicoated
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Excellent for astronomical use
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With adapter screw
Binger 11x70 astronomical binoculars:
Technical specifications:
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Focus system:  individual focus
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Objective diameter: 70mm
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Prisms:    BAK 4
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Coating :  Fully multi-coated
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Angle of view: 4.6 degrees
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Field of view:  240ft at 1000yds, 80m at 1000m
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Exit pupil: 6.4mm
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Relative brightness: 41
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Eye relief: 24mm
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Near focus: 15mm
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Waterproof: Yes
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Net weight: 1850g; 4LBS
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Fold down eyecups