Call us: 01444 23 70 70

Search terms








Pentax 8x21 UCF R Binoculars

Pentax 8x21 UCF R Binoculars

Product Code: 5770136


The Pentax 8x21 UCF R Binoculars blend a compact binocular with high performance 21mm lenses for outstanding optical performance and versatile usability throughout a wide variety of applications.

FREE delivery


Earn 58 Park Points

Trade in & Trade up

Looking to trade in your photo equipment? Get a quote now!


The Pentax 8x21 UCF R Binoculars blend a compact, palm-sized binocular with high performance 21mm objective lenses. UCF R Series Binoculars provide outstanding optical performance and versatile usability across a wide variety of applications, including outdoor nature observation, bird watching and sports, to indoor theatre viewing.

Highlight features:

A Bright, Clear Image Field

Pentax has incorporated multi-coated optical elements with high-refraction BaK4 glass prisms, allowing the 8x21 UCF R Binoculars to deliver high light transmission and reflection for a bright, clear image field. They also incorporate aspherical optical elements for clear, well-defined images with minimal distortion, right to the edges.

Shock Resistant Rubber Housing

The 8x21 UCF R from Pentax is encased in a durable rubber housing providing a firm, comfortable hold and excellent shock-resistant performance.

Innovative Dual-Axis Eye-Distance Adjustment System

The dual-axis eye-distance adjustment system makes it quick to adjust the distance between two eyepieces, ideal for sharing the binoculars with someone else.

Other Features

  • User-friendly eyepiece rings that can be extended or pushed into storage position with a single action
  • Diopter adjuster with a midpoint click stop (at neutral m-1 diopter position)
  • Short minimum focusing distance of 2.8 meters for close-range viewing

Pentax 8x21 UCF R Binoculars Specification


8 x 21 UCF R


Porro prism, center focusing (Linked-dual-axis)

Lens construction

(Objective lens) 2 elements in 1 group

(Eyepiece lens) 3 elements in 2 groups



Objective lens Diameter


Real field of view


Apparent field of view


Field of view at 1000m


Field of view at 1000 yard


Exit pupil


Eye Relief


Relative Brightness


Diopter adjustment range


Eye Width adjustment range

58 - 72mm

2.3 - 2.8 inches

Focusing range

Approximately 2.8m to infinity

Approximately 9.2ft to infinity

Eyepiece ring

Slide type

Body color


Height & Width

83 x 110mm

3.2 x 4.3 inches



1.9 inches



7.4 oz.


Eyepiece lens cap, Case, Strap

Offers: N/A
Offer Category: Optics
Offer Product Type: Binoculars
Colour: N/A
Diameter (mm): N/A
Height (mm): N/A
Length (mm): N/A
Width (mm): N/A
Weight (g): N/A
Environmental Sealing: N/A
Scope Close focus (m): N/A
Scope Eyerelief (mm): N/A
Focal length (mm): N/A
Scope Lens coating: N/A
Max magnification: N/A
Min magnification: N/A
Scope Objective lens (mm): N/A
Scope Type: N/A
Notes: N/A

Writing your review

Added to basket

  • Like New – The equipment is in a condition as if you have just bought it from the manufacturer. The item is still considered to be ‘Like New’ even without the original packaging. The product has been fully tested and is in perfect working order.
  • Excellent – The equipment should be close to being ‘Like New’ but there may be some small cosmetic blemishes that lower its grade. The product has been fully tested and is in perfect excellent order.
    • Cameras – Should have no marks on the LCD screen
    • Lenses – Should have no marks on the elements or dust within the lens
  • Very Good – The equipment may have some slight cosmetic wear to the paintwork and cosmetic blemishes  with only light signs of use and the product has been fully tested and is in great working order.
    • Cameras – The LCD screen may have small signs of wear that does not affect its display
    • Lenses – The mount of the lens will start to show signs of wear
  • Good – The equipment is showing more obvious signs of cosmetic wear and blemishes, but the product has been fully tested and is in great working order.
    • Cameras – LCD screen may have scratches or wear that is starting to affect the display.
    • Lenses – May have slight dust inside that does not affect images. The mount shows signs of use.
  • Well Used – The equipment will show significant signs of wear. The paintwork will be coming away in large areas exposing the metal work, but the product has been fully tested and is in great working order.
    • Cameras – LCD screen is heavily worn either by de-lamination or has scratches to it. Rubber grips are starting to come away from the body.
    • Lenses – The lens has dust inside that may affect images. The rubber zoom/focus ring is coming away from the barrel of the lens.

Trade in your old equipment

Fast and easy trade in service ensures your old gear is collected efficiently and you are paid quickly! It's very simple to trade in your unwanted photography gear. Just head over to our dedicated Sell or Part Exchange page, fill out the details, and we'll get back to you with an offer for your old gear. Take the cash, or put it towards the cost of your new gear. It's up to you! Find out more

sign up to the newsletter

follow us on social media