Pentax UCF Zoom II 8-16x21 Binoculars Porro Prism Rubber Frame Black Finish 62217

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With a magnification range from 8X to 16X, the 8-16X21 UCF Zoom II binocular gives you incredible zooming ability with the convenience of a compact design. As with other UCF models, the 8-16x21 UCF Zoom II has an innovative dual-axis eye-distance adjustment system, high-refraction BaK4 glass prisms, multi-coated optical elements, and aspherical lens elements incorporated into the eyepiece optics. This portable, compact, user-friendly binocular is perfect for the viewer on the go - whether it be bird watching, sporting events, wildlife or indoor performance viewing.

Specifications and Features:
Magnification power ranges from 8 to 16x21
Aspheric lens elements enhance edge-to-edge sharpness
On-line control system positions zooming, focusing and diopter adjustment together
High-refraction BaK4 glass prisms for brighter, clearer image
Pop-out right diopter adjustment knob
Porro prism
Center focusing
Center zoom ring
Center diopter adjustment knob
Objective Lens: 2 elements in 1 group
Eyepiece Lens: 4 elements in 3 groups
Lens: Multi-coating
Prism: Coating
Magnification: 8 to 16X
Objective Lens Diameter: 21mm
Real Field of View: 5.0 degrees (8X) to 3.0 degrees (16X)
Apparent Field of View: 40 degrees (8X) to 48 degrees (16X)
Field of View at 1000 Yards: 261 ft. (8X) to 156 ft. (16X)
Exit Pupil: 2.6mm (8X) to 1.3mm (16X)
Eye Relief: 14mm (8X) to 11mm (16X)
Relative Brightness: 6.7 (8X) to 1.7 (16X)
Diopter Adjustment Range: +/- 4 m -1 (8X)
Diopter Adjustment: Center knob (pop up)
Eye Width Adjustment Range: 56 to 73.5mm
Focusing Range: 3m to infinity
Eyepiece Ring: Helicoid ty pe
Body Color: Black
Accessories: Eyepiece lens caps, Case, Neck strap