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Home  >  Binoculars >  Item # PKB816x21UCF (MFR# 62217)

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8-16x21 UCF Zoom II Binoculars with Case
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Pentax 8-16x21 UCF Zoom II Binoculars with Case

Condition: Brand new, USA Warranty
The compact 8-16x21 UCF ZOOM II porro-prism binocular offers user selectable magnification from eight to 16 times. This sleek zoom model features effortless operation.

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.


  • 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.
  • Protected by a limited lifetime warranty.
  • 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
  • Customer Reviews
    Pentax 8-16x21 UCF Zoom II Binoculars with Case

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    4 out of 5 stars   good for the price
    By Paul (Houston, TX) December 08, 2011
    Review submitted for Pentax 8-16x21 UCF Zoom II Binoculars with Case (PKB816x21UCF)
    Verified Purchaser
    Pros: Quality Lenses, Lightweight, Compact
    Cons: Difficult To Focus
    Other Comments: requires some effort to get in focus, but do work well once they are dialed in. Zoom requires more light to get a clear image. Overall great for the price, and work well for hunting.
    I recommend this product Yes, I recommend this product
    Merchant Response:
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