Pentax UP 8-16x21mm Zoom Binoculars

Pentax UP 8-16x21mm Zoom Binoculars
Pentax UP 8-16x21mm Zoom BinocularsPentax UP 8-16x21mm Zoom BinocularsPentax UP 8-16x21mm Zoom Binoculars
Pentax UP 8-16x21mm Zoom BinocularsPentax UP 8-16x21mm Zoom Binoculars
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Model:  pntx_up_8-16x21_blk_61961
Part Number:  61961
Brand:  Pentax
Type:  Classic
Style:  Inverted Porro
Magnification:  8-16x
Aperture:  21mm
Features:  Zoom
Prism Type:  Inverted Porro Prism


  • UP Binoculars
  • Objective Lens Caps
  • Eyepiece Lens Caps
  • Carrying Case
  • Neck Strap
  • Lens Cloth
  • Instruction Manual

Pentax U-Series

The Pentax U-series - These compact, inverted porro-prism models feature a durable dual-axis, single body design with synchronised IPD adjustment and full multi-coating for better light transmission. Aspherical lens elements give you edge-to-edge sharpness. They are a perfect “utility” companion for a multitude of applications.

these binoculars are multi-functional wizard! In one compact and lightweight binocular you have the power to observe with 8 to 16x magnification by simply turning the central wheel. Add to this the aspherical lens elements for edge-to-edge sharpness, BaK4 prisms and multi-coated lenses to enhance brightness & contrast, and voilà, you have the perfect travel companion who won’t let you miss a thing! 


  • New fully multi-coated optics
  • Inverted porro prism design
  • Aspherical lens elements providing edge-to-edge sharpness
  • High Quality BaK4 prism to enhance transmission and resolution
  • Dual-axis, single body design with synchronized eye-piece IPD adjustment
  • Black rubber armouring
  • Pull-up eyecups
  • Centrally-located lockable diopter adjustment

New Fully-multi-coated optics

Fully multi-coated lenses serve the essential purpose of maximising
the amount of light passing through a lens, thereby prevent flare and ghosting from interfering with your view. PeNtAX applies multiple layers of coatings to every surface of every element and prism in the full sport Optics line-up. these fully-multi-coated optics assure the maximum light transmission resulting in a clear, crisp view of the world.

BaK4 prisms

Due to its outstanding refractive index, the BaK4 glass prism found in all PeNtAX sport Optics is highly acclaimed for its perfectly round exit pupil and clear, unvignetted image.

Aspherical lens elements

edge-to-edge sharpness is a vital element to comfortable viewing. to achieve this, we utilise aspherical lens elements in our eyepieces. this is a specially shaped lens design that reduces aberration to a minimum. 

Inner Focus Optics Design

this sophisticated optical design is critical to low-maintenance and long life guarantee. exposure to airbourne particles and moisture is avoided, thereby ensuring that no outside influences can penetrate the housing and disrupt functionality.

Other Features

Helicoid three-stop eyepiece rings that permit fine adjustment for maximum viewing comfort

Exterior rubber coating that provides the binoculars with superb resistance to shocks and impacts. 

Product Specifications

Product CodeBlack: 61961
Brown: 61962
Green: 61963
TypePorro Compact
Objective Lens Diameter21 mm
Field of View at 1000m87-52 m
Exit pupil aperture2.6-1.3 mm
Eye Relief14-11 mm
EyecupsTwist-Up Multi-Stop
Height55 mm
Width111 mm
Depth111 mm
Weight310 g
Water proofNo
AccessoriesObjective and eyepiece caps, case, strap
Prism coatingBaK4
Lens coatingNew fully multi-coated optics
Twilight Factor13.0-18.3
Close focus3 m
Tripod AdaptorNo

Pentax UP 8-16x21mm Zoom Binoculars Questions & Answers

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Q1. How much do these binoculars weigh?

The Pentax UP 8-16x21 binoculars weigh approximately 310g / 10.93oz.

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