Pentax - 8x40 S-Series SP WP Binoculars

A Guide to Birding with Binoculars

Designed for a lifetime of rugged outdoor use Pentax's 8x40 S-Series SP WP Binoculars 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 their 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 binoculars sport a generous 20mm eye relief and the fold-down eyecups seal against the ocular cavity to block stray peripheral light which can dim images.

Todd Vorenkamp

5 years ago

Joseph Albanese

5 years ago

Christopher Witt

4 years ago

Christopher Witt

11 months ago

User Manual

1.7 MB

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

• Designed for a lifetime of rugged outdoor use Pentax's 8x40 S-Series SP WP Binoculars 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 their 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 binoculars sport a generous 20mm eye relief and the fold-down eyecups seal against the ocular cavity to block stray peripheral light which can dim images.