Pentax SP WP Binoculars

Pentax SP WP Binoculars

  • BAK4 Porro Prism
  • Fully Multicoated Optics
  • 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
Brand: Pentax Code: 00ZPNTXSPWPBN

Designed for both astronomical and terrestrial use, Pentax's 8x40 /10x50 /12x50 /20x60 SP S-Series WP Binocular can be used with confidence in all weather and conditions. The large oversized 40mm (8X40) /50mm (10X50, 12X50) /60MM (20X60) objectives are fully multicoated to reduce reflection and maximize light transmission through the entire optical path. 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 large objectives and coatings maximize the amount of light getting to the user's eyes for exceptional low-light capabilities, and its high 10x magnification provides an immersive observation experience. 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 and effect night adjusted vision for 10x50, 12x50 & 20x60.

Optical Performance

  • 8x 10x 12x 20x magnification
  • BAK4 porro prism optical path
  • Anti-reflection fully multicoated optics

Use and Handling

  • Closed bridge configuration
  • Large knurled center focus wheel
  • Right-eye diopter adjustment
  • 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

Prism Type



8x 10x 12x 20x

Objective Lens Diameter

40 mm /50 mm /50 mm /60 mm

Angle of View

6.3° (8x40)
5.0° (10x50)
4.2° (12x50)
2.2° (20x60)

Field of View

330.7' @ 1000 yd / 110.2 m @ 1000 m (8x40)
262.5' @ 1000 yd / 87.5 m @ 1000 m (10x50)
220.5' @ 1000 yd / 73.5 m @ 1000 m (12x50)
115.5' @ 1000 yd / 38.5 m @ 1000 m (20x60)

Minimum Focus Distance

74.9' / 22.8 m (8x40)
117.3" / 3 m (10x50)
117.3" / 3 m (12x50)
58.2' / 17.7 m (20x60)

Exit Pupil Diameter

5.0 mm (8x40)
5.0 mm (10x50)
4.2 mm (12x50)
3.0 mm (20x60)

Eye Relief

20 mm / 21mm (20x60)

Interpupillary Adjustment

Not Specified by Manufacturer

Dioptric Correction

Not Specified by Manufacturer

Focus Type


Tripod Mount

Yes (Adapter Optional)


7.0 x 5.4 x 3.0" / 17.8 x 13.7 x 7.6 cm (8x40)
7.2 x 7.0 x 3.1" / 18.3 x 17.8 x 7.9 cm (10x50)
7.2 x 7.0 x 3.1" / 18.3 x 17.8 x 7.9 cm (12x50)
8.8 x 7.7 x 3.4" / 22.4 x 19.6 x 8.6 cm (20x60)


31.8 oz / 901.5 g (8x40)
37.4 oz / 1060.3 g (10x50)
38.1 oz / 1080.1 g (12x50)
49.4 oz / 1400.5 g (20x60)

  • Pentax 8x40 /10x50 /12x50 /20x60 S-Series SP WP Binocular
  • Neck Strap
  • Carrying Case with Strap
  • 2 x Objective Lens Caps
  • 2 x Eyepiece Caps
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