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

Pentax UP 8-16x21mm Zoom Binoculars

  (1 Review)
✓ 2 year warranty
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Out of stock due 7-10 working days

About this product

Model:  pntx_up_8-16x21_blk_61961
Part Number:  61961

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. 

What's in the box

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


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

Customer reviews

Average Rating (1 Review):  
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Could be great
08 September 2021  | 

Fantastic format and quality feels great. However I was unlucky with the specific binoculars I received and did not realize in time. They always had a little double vision, but I assumed this could be adjusted when I got around to it. These cannot be adjusted and since I didn't realize until after 18 months FLO could not help. The 24 month warranty does not cover this type of issue for the whole period. Alignment at a local shop costs more than what I paid for them so they had to be discarded basically unused. My bad and my loss.
If they had been aligned from the factory it would be an easy 5 star. Surprisingly good optics and the zoom is smooth. It's really great to acquire an object and then zoom in on it.
Recommended, but check alignment thoroughly as soon as you receive it.


Binoculars don't lose their collimation without receiving a knock so this isn't generally covered by manufacturers warranty. If they are received out of collimation then we will collect and replace them straightaway but after 18 months, this is usually caused by an impact or damage of some kind.


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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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