Designed for both astronomical and terrestrial use, Pentax 's 16x50 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 16x 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.
Features
Optical Performance
- 16x magnification
- 50mm objective lenses
- BAK4 porro prism optical path
- Anti-reflection fully multicoated optics
- 183.8'' field of view at 1000 yards
- 56° angle of view
Use and Handling
- Closed bridge configuration
- Large knurled centre focus wheel
- Right-eye dioptre adjustment
- 13mm eye relief, 3.1mm exit pupil
- Fold-down rubber eyecups seal against ocular cavity and block stray peripheral light
Construction Details
- Rubberised armouring protects against impacts and provides slip-resistant grip
- Tripod mountable with optional adapter
Specifications
| Prism Type | Porro |
| Magnification | 16x |
| Objective Lens Diameter | 50mm |
| Angle of View | 3.5° (actual) |
| Field-of-View | 183.8' @ 1000 yd / 61.02 m @ 1000 m |
| Minimum Focus Distance | 34.0' / 10.36 m |
| Exit Pupil Diameter | 3.1 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 |
