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.
Use and Handling
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)
20 mm / 21mm (20x60)
Not Specified by Manufacturer
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)
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C.R. Kennedy is Australia’s leading importer and distributor of photographic equipment. Our head office and main warehouse is located in Melbourne with branch offices and warehouses in Adelaide, Brisbane, Cairns, Perth and Sydney.
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