Designed for both astronomical and terrestrial use,Pentax\’s8×40 /10×50 /12×50 /20×60 SP S-Series WP Binocularcan 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 imagesand effect night adjusted vision for 10×50, 12×50 & 20×60.

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