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BAK4 Porro Prisms
Fully Multicoated Optics
Closed Bridge Configuration
Slip-Resistant Rubberized Armoring
Center Focusing
Tripod Mountable
Fold Down Eyecups
Large Center Focus Wheel (8x40)
Tripod Mountable with Optional Adapter (8x40)
Fold-Down Rubber Eyecups (8x40)
Designed for both astronomical and terrestrial use,
Pentax
's
10x50 /12x50 /16x50 S-Series SP Binocular
features large oversized fully multicoated 50mm objectives 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 12x 16x magnification provides an immersive observation experience whether users are bird watching or comet hunting.
The binocular sports a generous 13mm (8x40, 10x50, 12x50) 11mm (12x50) eye relief and the fold-down eyecups seal against the ocular cavity to block stray peripheral light which can dim images. Its over-sized objectives add weight and bias the center of gravity forward making user fatigue a concern and hand-shake a possibility, so to aid long observation sessions the binocular can be mounted on a tripod using an optional adapter.
Designed to provide an immersive experience for nature and bird watching,
Pentax
's
8x40 S-Series SP Binocular
boasts a wide 65.6° angle of view and porro prisms that produce a rich depth of view. 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. The coatings ensure bright and clear high-contrast images even in low-light, and its utilitarian 8x magnification brings subjects close while maintaining wide 430' field of view at 1000 yards to preserve situational awareness. The binocular sports a 13mm eye relief and the fold-down eyecups seal against the ocular cavity to block stray peripheral light which can dim images.
Optical Performance
8x 10x 12x 16x magnification
50mm objective lenses
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
Internal focusing system (8x40)
Rubberized armoring protects against impacts and provides slip-resistant grip
Tripod mountable with optional adapter
Specifications
- Prism Type: Porro
- Magnification: 8x 10x 12x 16
- Objective Lens Diameter: 40 mm (8x) 50mm (10x, 12x, 16x)
- Angle of View: 8.2° (8x) 6.4° (10x) 5.6° (12x) 3.5° (16x)
- Field of View: 430.4' @ 1000 yd / 143.5 m @ 1000 m (8x) 336.0' @ 1000 yd / 112.0 m @ 1000 m (10x) 294.0' @ 1000 yd / 98.0 m @ 1000 m (12x) 183.7' @ 1000 yd / 61.2 m @ 1000 m (16x)
- Minimum Focus Distance: 127.8' / 39 m (8x) 191.5' / 58.4 m (10x) 191.5' / 58.4 m (12x) 219.5' / 66.9 m (16x)
- Exit Pupil Diameter: 5.0 mm (8x) 5.0 mm (10x) 4.2 mm (12x) 3.1 mm (16x)
- Eye Relief: 13 mm
- Interpupillary Adjustment: Not Specified by Manufacturer
- Dioptric Correction: Not Specified by Manufacturer
- Focus Type: Center
- Tripod Mount: Yes (Adapter Optional)
- Dimensions: 7.4 x 5.2 x 2.2" / 18.8 x 13.2 x 5.6 cm (8x) 7.8 x 6.5 x 2.3" / 19.8 x 16.5 x 5.8 cm (10x) 7.8 x 6.3 x 2.3" / 19.8 x 16.0 x 5.8 cm (12x) 7.8 x 6.5 x 2.3" / 19.8 x 16.5 x 5.8 cm (16x)
- Weight: 27.2 oz / 771.1 g (8x) 32.00 oz / 907.20 g (10x) 31.00 oz / 878.85 g (12x) 32.00 oz / 907.20 g (16x)
