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The Bushnell Natureview 10x42 Binocular has an outstanding optical performance in a trim, well-balanced roof prism design. Features - BaK-4 roof prisms - Fully multi-coatedoptics (on select models) for superior light transmission and brightness - Twist-up eyecups - Adaptable to tripod - Textured centerfocus knob for easy, precise adjustments - Rugged, non-slip rubber armor absorbs shock - Warranty: 30 years Specifications - Optical system: Roof - Objective lens diameter: 42 mm - Magnification: 10x - Field of view at 1000 m: 105 m - Luminous intensity: 17.64 - Twilight factor: 20.49 - Exit pupil: 4.2 mm - Close focus: 4.5 m - Eye relief: 17 mm - Weight: 0.652 kg Included Accessories - Carrying bag - Neck strap
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