SKU: 29459119057

Pentax 8x21 U-Series UP Binocular (Black)

Sale price$5107.50 Regular price$5675.00
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Description

Pentax 8x21 U-Series UP Binocular (Black)Aspherical Lens Elements BAK4 Porro Prisms Fully Multicoated Optics Angle of View: 6. 2 Center Focusing Sliding Eyecups The compact and lightweight black 8x21 U Series UP Binocular combines aspherical optical elements and BAK4 Porro prisms to deliver edge to edge image sharpness with a 50 angle of view. The optical elements are also fully multicoated to provide a high transmission of light. With an 8x magnification and 21mm objectives, you obtain a

  • Aspherical Lens Elements
  • BAK4 Porro Prisms
  • Fully Multicoated Optics
  • Angle of View: 6.2°
  • Center Focusing
  • Sliding Eyecups

The compact and lightweight black 8x21 U-Series UP Binocular combines aspherical optical elements and BAK4 Porro prisms to deliver edge-to-edge image sharpness with a 50° angle of view. The optical elements are also fully multicoated to provide a high transmission of light. With an 8x magnification and 21mm objectives, you obtain a notable magnification, insignificant image jitter due to unsteady hands, and a compact form factor. You can easily spot your targets with a wide 6.2° angular field of view and quickly bring them into focus with a center focus wheel. In addition to observing distant scenes, birds and game, the minimum focus of 9.2' allows you to study in detail close objects like animal footprints, marks or landscape features. The binocular also features a 2.6mm exit pupil, a 13mm eye relief, an interpupillary and a diopter adjustments.

The binocular is very compact, lightweight, and features a single piece frame that houses objectives, which allows for a synchronized interpupillary adjustment. To accommodate glass wearers, the binocular offers sliding rubber eyecups. Also included are a carrying case, a neck strap, and eyepiece covers.

Optical Performance
  • BAK4 Porro prisms
  • Aspherical optical elements offer edge-to-edge image sharpness
  • Fully multicoated optics
  • Angular field of view: 6.2°
  • Interpupillary adjustment
  • Diopter adjustment
Construction Details
  • Single piece objectives' frame allows for a synchronized interpupillary adjustment
  • Contoured body provides a comfortable grip
  • Center focus knob offers an easy focusing
  • Sliding rubber eyecups
UPC: 027075288782
Prism Type Porro
Magnification 8x
Objective Lens Diameter 21mm
Angle of View 6.2° (actual)
Field-of-View 326' @ 1000 yd / 108.23 m @ 1000 m
Minimum Focus Distance 9.24' / 2.82 m
Exit Pupil Diameter 2.6  mm
Eye Relief 13  mm
Interpupillary Adjustment Not Specified By Manufacturer
Dioptric Correction Not Specified By Manufacturer
Focus Type Center
Dimensions 4.33 x 3.26 x 1.9" / 11.00 x 8.28 x 4.83  cm
Weight 7.4 oz / 210 g
Packaging Info
Package Weight 0.7 lb
Box Dimensions (LxWxH) 4.6 x 3.8 x 2.3"
In the Box
Pentax 8x21 U-Series UP Binocular (Black)
  • Neck Strap
  • Carrying Case
  • 2 x Eyepiece Covers
  • Limited Lifetime Warranty
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 29459119057

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Lindsey
New York, US
★★★★★ 5
Good for kids
Color: Blue+red
A little powerful for my 8 year old at first but after he got the hang of it, he loves using it.
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Reviewed in the United States on May 7, 2026
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Jennifer Faber
Omaha, US
★★★★★ 5
Great for dental appliances
Color: Pink+purple
My daughter has a dental appliance that can get food caught in it. We were told to try a water flosser to get the trapped food out. This has done exactly that. Very happy with it.
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Reviewed in the United States on January 7, 2026
A
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Amazon Customer
Phoenix, US
★★★★★ 5
Fun new way of flossing.
Color: Blue+red
My 7 year old loves it and it works really well. He’s excited about teeth brushing time again accompanied by water flosser and it can be used in the shower!
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Reviewed in the United States on March 19, 2026
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pbadia
Fort Morgan, US
★★★★★ 5
Just as described
Color: Blue+red
Just as described. Quick shipping
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Reviewed in the United States on April 4, 2026
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Ashlee M.
San Leandro, US
★★★★★ 3
Leaks
Color: Blue+red
Water leaks out of the button you press to change out the head so we will be sending back. Other than that it would be perfect, I’m sure it’s just a fluke thing.
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Reviewed in the United States on June 1, 2026

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