Pentax 4X20 VD WP 3-in-1 Binocular

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Product Overview

  • Three Different Uses & Configurations
  • Use as One Binocular
  • Two Monoculars
  • Stack Optical Tubes as a 16x Spotter
  • Dielectric & Phase-Corrected Roof Prisms
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Outfitted with a truly innovative design, the Pentax 4X20 VD WP 3-in-1 Binocular can be quickly and easily converted from a simple binocular into either two separate monoculars or, with the optical tubes stacked one in front of the other, a powerful 16x spotting scope. Depending on what configuration you put the 4x20 VD in, the performance will change.  

Optically, the low magnification produces a generous 5mm exit pupil that keeps the scene in full view. Dielectric and phase-correcting prism coatings work together with anti-reflection fully multicoated optics to maximize light transmission to produce bright and clear high-contrast views with accurate color and crisp resolution. Twist-up helicoid rubber eyecups make using them with or without eyewear comfortable.

Designed for comfort and durability, the housing has exterior armor and ridges that provide a slip-resistant grip. The housing is sealed to an IPX7 rating, so you can keep using it if you get caught in a sudden downpour or gets accidentally dropped in a puddle or shallow stream. Since the VD WP is meant to be used by two people when configured as monoculars, the included neck strap can be converted into two wrist straps for security.

Key Features of the Pentax 4X20 VD WP 3-in-1 Binocular

  • As a binocular, the close focus distance is 1.5 m, but as monoculars, that distance drops to an impressive 50 cm.
  • The angle of view constricts from 10° as a binocular or monocular to 2.6° in spotter mode.
  • Similarly, the exit pupil is 5mm in binocular/monocular modes and drops to 1.25mm in spotter configuration.

  • MPN - 63600
  • GTIN - 027075301702
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Prism Type Roof


Magnification 4x
Objective Lens Diameter 20 mm
Angle of View 4x: 10° (Actual)
16x: 2.6° (Actual)
Field of View 4x: 527.11' @ 1000 yd / 175 m @ 1000 m
16x: 135.54' @ 1000 yd / 45 m @ 1000 m
Minimum Focus Distance 4.92' / 1.5 m
Exit Pupil Diameter 4x: 5 mm
16x: 1.25 mm
Eye Relief 19 mm
Interpupillary Adjustment None
Diopter Adjustment None
Focus Type Individual


Fogproof No
Water Resistance Waterproof, IPX7


Dimensions 11 x 9 x 3 cm
Weight 0.366 kg
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What’s In The Box
  • Pentax 4X20 VD WP 3-in-1 Binocular
  • Case
  • Convertible Strap
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