Pentax 8x40 S-Series SP WP Binocular

Pentax 8x40 S-Series SP WP Binocular

Pentax 8x40 S-Series SP WP Binocular

B&H # PE8X40SPWP MFR # 65871
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Product Highlights

  • BAK4 Porro Prism
  • Fully Multicoated Optics
  • Angle of View: 50°
  • Nitrogen-Filled, Water and Fogproof
  • Closed Bridge Configuration
  • Slip-Resistant Rubberized Armoring
  • Large Center Focus Wheel
  • Tripod Mountable with Optional Adapter
  • Fold-Down Rubber Eyecups
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Pentax SP WP Overview

  • 1Description

Designed for a lifetime of rugged outdoor use Pentax's 8x40 S-Series SP WP Binocular can be used with confidence in all weather and lighting conditions. The 40mm objectives are fully multicoated to reduce reflection and maximize light transmission through the entire optical path without making them overly cumbersome for a long day on the trail. Utilizing the traditional porro prism configuration gives scenes a rich depth of view for an immersive observation experience and provides a comfortable feel in the hand with a lot of surface area to maintain a sure grip. The coatings ensure bright and clear high-contrast images even in low-light, and its utilitarian 8x magnification brings subjects close while maintaining 363' field of view to preserve situational awareness.

Complementing the optical performance are construction details made for the trail. The optical tubes are nitrogen-filled and O-ring sealed for fogproof performance and to make them submersible to as much as 3.3'. The binocular sports a generous 20mm eye relief and the fold-down eyecups seal against the ocular cavity to block stray peripheral light which can dim images.

Optical Performance
  • 8x magnification
  • 40mm objective lenses
  • BAK4 porro prism optical path
  • Anti-reflection fully multicoated optics
  • 331' field of view at 1000 yards
  • 50° angle of view
Use and Handling
  • Closed bridge configuration
  • Large knurled center focus wheel
  • Right-eye diopter adjustment
  • 20mm long eye relief, 5.0mm exit pupil
  • Fold-down rubber eyecups seal against ocular cavity and block stray peripheral light
Construction Details
  • Rubberized armoring protects against impacts and provides slip-resistant grip
  • Nitrogen-filled, fogproof and submersible to 3.3' (1m)
  • Internal focusing system helps to maintain waterproof seals
  • Tripod mountable with optional adapter
UPC: 027075288676

Pentax SP WP Specs

Prism Type Porro
Magnification 8  x
Objective Lens Diameter 40 mm
Angle of View 6.3° (Actual)
Field of View 330.7' @ 1000 yd / 110.2 m @ 1000 m
Minimum Focus Distance 74.9' / 22.8 m
Exit Pupil Diameter 5 mm
Eye Relief 20 mm
Focus Type Center
Tripod Mount Yes (Adapter Optional)
Dimensions 7.0 x 5.4 x 3.0" / 17.8 x 13.7 x 7.6 cm
Weight 31.8 oz / 901.5 g
Packaging Info
Package Weight 2.63 lb
Box Dimensions (LxWxH) 8.55 x 7.35 x 3.9"

Pentax SP WP Reviews

8x40 S-Series SP WP Binocular is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from No regrets These are excellent binoculars. I use them for handheld binocular astronomy. They inspire confidence: Fully multi-coated, waterproof, solid mechanics, comfortable in the hand. Most importantly, they see well: Stars are pinpoints. The Orion Nebula, the Beehive Cluster, and the Double Cluster in Perseus all appeared clear and beautiful. For 8x I expected it to split the double star Kuma (or Nu Draconis) in Draco, and it did. It also showed 2 of Jupiter's moons on a not-so-clear night as clear points (the other two moons were too close to the planet and so appeared as one). The 6 FOV is adequate. Daytime views are neutral, not tinted. I am not comparing them to 7x50, 10x50, or IS binoculars, as each of these display the skies differently, each having its own unique advantage over the others. But as 8x40s go, these are superb. Easy to grab and go, no need to mount, comfortable to use, with clear and pleasing views.
Date published: 2017-04-29
Rated 5 out of 5 by from Much more than just great value They are sharp and well collimated, easy to focus and very comfortable to use. I wear spectacles and I find the eye relief ample. The choice of 8x magnification works well with the 40mm objectives and the view is very bright. Everything from birds in the tree tops to stars in the sky are pinpoint sharp with great contrast and natural colour. The design is a well considered balance of everything you need in a general purpose binocular with a minimum of compromise and a great price. The internal focus works well and is likely to make the weather sealing effective. Everything about it is solid and easy to use. It's heavy at 900 grams and bulkier than a roof prism design, but for the price they are simply brilliant. The only thing not to like are the worse than useless lens covers - they simply won't stay on. They should be considered part of the packaging not part of the product. With reasonable care and an occasional clean the lenses will survive just fine even without the lens caps. I chose these over the Nikon 7x35 and 8x40 action extreme due to the Pentaxes better eye relief and internal focus. All in all I'm very happy and will likely get myself a pair of 20x60 Pentaxes to mount on a tripod for stargazing given my experience with these.
Date published: 2018-08-31
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