Pentax UCF Zoom II 8-16x21 Binos w/Cs

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. Features: - Magnification power ranges from 8 to 16x21. - Aspheric lens elements enhance edge-to-edge sharpness. - In-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. Specifications: - Binocular Type: Porro prism, Linked-dual-axis, Center focusing, Center zoom ring, Center diopter adjustment knob - Lens Construction: Objective Lens: 2 elements in 1 group Eyepiece Lens: 4 elements in 3 groups - Coating: 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 Meters: 87m (8X) to 52m (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) - Prism: Porro - 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 type - Body Color: Black - Height Width: 55mm x 111mm - Thickness: 111mm - Weight: 280g - Waterproof: No - Accessories: Eyepiece lens caps, Case, Neck strap