Designed for both astronomical and terrestrial use, Pentax 's 10x50 S-Series SP Binocular features large oversized fully multicoated 50mm objectives to reduce reflection and maximise light transmission through the entire optical path.
Utilising 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 maximise 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 whether users are bird watching or comet hunting.
The binocular sports a generous 13mm 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 centre 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.
Key Features
Optical Performance
- 10x magnification
- 50mm objective lenses
- BAK4 porro prism optical path
- Anti-reflection fully multicoated optics
- 341.3'' field of view at 1000 yards
- 64° wide angle of view
Use and Handling
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- Closed bridge configuration
- Large knurled centre focus wheel
- Right-eye dioptre adjustment
- 13mm eye relief, 5.0mm exit pupil
- Fold-down rubber eyecups seal against ocular cavity and block stray peripheral light
Construction Details
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- Rubberised armouring protects against impacts and provides slip-resistant grip
- Tripod mountable with optional adapter
Specifications
| Prism Type |
Porro |
| Magnification |
10x |
| Objective Lens Diameter |
50mm |
| Angle of View |
6.4° (actual) |
| Field-of-View |
341.3' @ 1000 yd / 113.31 m @ 1000 m |
| Minimum Focus Distance |
29.7' / 9.05 m |
| Exit Pupil Diameter |
5.0 mm |
| Eye Relief |
13 mm |
| Interpupillary Adjustment |
Not Specified By Manufacturer |
| Dioptric Correction |
Not Specified By Manufacturer |
| Focus Type |
Centre |
| Tripod Mount |
Yes (Adapter Optional) |
| Dimensions |
7.8 x 6.5 x 2.3" / 19.81 x 16.51 x 5.84 cm |
| Weight |
32 oz / 907.20 g |
