Pentax 8-16x21 U-Series UP Binoculars (Brown)

BH #PE816X21UPBR • MFR #61962
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Pentax 8-16x21 U-Series UP Binoculars (Brown)
Key Features
  • Aspherical Lens Elements
  • BAK4 Porro Prisms
  • Fully Multicoated Optics
  • 8-16x Optical Zoom
The compact and lightweight brown 8-16x21 U-Series UP Binoculars combine aspherical optical elements and BAK4 Porro prisms to deliver edge-to-edge image sharpness with a wide angle of view. The optical elements are also fully multicoated to provide a high transmission of light. With an 8-16x range of magnification and 21mm objectives, you obtain a wide zooming range and a compact form factor. You can easily spot your targets with a 5° angular field of view at 8x magnification and quickly zoom in on them with the optical zoom. To reduce image jitter at high zoom factors or for prolonged observations, you can connect the binoculars to a tripod via an integrated 1/4"-20 socket. In addition to observing distant scenes, birds and game, the minimum focus of 63.8' allows you to study in detail close objects like animal footprints, marks or landscape features. The binoculars also feature a 2.6-1.3mm exit pupil range, a 14-11mm eye relief range, an interpupillary and a diopter adjustments.
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Pentax UP 8-16x21 Overview

The compact and lightweight brown 8-16x21 U-Series UP Binoculars combine aspherical optical elements and BAK4 Porro prisms to deliver edge-to-edge image sharpness with a wide angle of view. The optical elements are also fully multicoated to provide a high transmission of light. With an 8-16x range of magnification and 21mm objectives, you obtain a wide zooming range and a compact form factor. You can easily spot your targets with a 5° angular field of view at 8x magnification and quickly zoom in on them with the optical zoom. To reduce image jitter at high zoom factors or for prolonged observations, you can connect the binoculars to a tripod via an integrated 1/4"-20 socket. In addition to observing distant scenes, birds and game, the minimum focus of 63.8' allows you to study in detail close objects like animal footprints, marks or landscape features. The binoculars also feature a 2.6-1.3mm exit pupil range, a 14-11mm eye relief range, an interpupillary and a diopter adjustments.

The binoculars are very compact, lightweight, and feature a single piece frame that houses objectives, which allows for a synchronized interpupillary adjustment. To accommodate eye glasses wearers, the binoculars offer sliding rubber eyecups. Also included are a carrying case, a neck strap, and eyepiece covers.

Optical Performance
  • Optical zoom range: 8-16x
  • BAK4 Porro prisms
  • Aspherical optical elements offer edge-to-edge image sharpness
  • Fully multicoated optics
  • Angular field of view range: 5-3°
  • 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
  • 1/4"-20 tripod socket
UPC: 027075288898

Pentax UP 8-16x21 Specs

Key Specs
Prism Type
Porro (BAK4)
Magnification
8 to 16x
Objective Lens Diameter
21 mm
Angle of View
8x: 5° (Actual)
16x: 3° (Actual)
Field of View
16x: 158.1' / 52.5 m @ 1000 m
Exit Pupil Diameter
8x: 2.6 mm
16x: 1.3 mm
Prism Type
Porro (BAK4)
Performance
Magnification
8 to 16x
Objective Lens Diameter
21 mm
Angle of View
8x: 5° (Actual)
16x: 3° (Actual)
Field of View
16x: 158.1' / 52.5 m @ 1000 m
Minimum Focus Distance
63.6' / 19.4 m
Exit Pupil Diameter
8x: 2.6 mm
16x: 1.3 mm
Eye Relief
8x: 14 mm
16x: 11 mm
Diopter Adjustment
Yes
Focus Type
Center
General
Fogproof
No
Environmental Resistance
No
Dimensions
4.4 x 4.4 x 2.1" / 11.1 x 11.1 x 5.3 cm
Weight
10.9 oz / 309 g
Packaging Info
Package Weight
1.15 lb
Box Dimensions (LxWxH)
5.8 x 5.6 x 3.2"

Pentax UP 8-16x21 Reviews

Great value for Compact Bino

By Lee
Rated 5 out of 5
Date: 2024-01-28

I really like these binoculars. The 8x16 zoom is very useful and retains focus throughout the range. It's not for night time use but that's not what I wanted. The eye cups stay in place, both focus and zoom are smooth. Can't ask for much more at this price. Only nit: wish the lens cap were tethered to the binos.

Decent binocular

By Andrzej
Rated 4 out of 5
Date: 2020-06-02

I'm quite happy for this binocular. Maybe magnification is not as big as my previous no-name Chinese product (this one has max 16, my previous had 20), but I prefer Pentax. It has set of 3 regulators just in the center and is really easy and quick to get focus. In my previous binocular it took 10-20 seconds, and still image wasn't so sharp like in the Pentax. Besides, it is small but bright enough to watch all birds when I hike.

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