Pentax SP 10x50 Binoculars
- BAK4 Porro Prisms
- Fully Multicoated Optics
- Wide Angle of View: 64°
- Closed Bridge Configuration
- Slip-Resistant Rubberized Armoring
- Center Focusing
- Tripod Mountable
- Fold Down Eyecups
Pentax's 10x50 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 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 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.
Optical Performance
- 10x magnification
- 50mm objective lenses
- BAK4 porro prism optical path
- Anti-reflection fully multicoated optics
- 3 field of view at 1000 yards
- 64° wide angle of view
Use and Handling
- Closed bridge configuration
- Large knurled center focus wheel
- Right-eye diopter adjustment
- 13mm eye relief, 5.0mm exit pupil
- 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
- Tripod mountable with optional adapter
Prism Type |
Porro |
Magnification |
10x |
Objective Lens Diameter |
50mm |
Angle of View |
6.4° (actual) |
Field of View |
336.0 @ 1000 yd / 112.0 m @ 1000 m |
Minimum Focus Distance |
191.5 / 58.4 m |
Exit Pupil Diameter |
5.0 mm |
Eye Relief |
13 mm |
Focus Type |
Center |
Tripod Mount |
Yes (Adapter Optional) |
Dimensions |
7.8 x 6.5 x 2.3 / 19.8 x 16.5 x 5.8 cm |
Weight |
32 oz / 907.20 g |
Brand: Pentax |
Code: 65903
APN: 0027075288737 |
Supplier Code: 65903
Brand: Pentax |
Code: 65903
APN: 0027075288737 |
Supplier Code: 65903
At a glance
- BAK4 Porro Prisms
- Fully Multicoated Optics
- Wide Angle of View: 64°
- Closed Bridge Configuration
- Slip-Resistant Rubberized Armoring
- Center Focusing
- Tripod Mountable
- Fold Down Eyecups