Pentax S-Series SP WP BAK4 Porro Prism Waterproof Fogproof Binoculars

Designed for both astronomical and terrestrial use, Pentax's 10x50/12x50/20x60 SP S-Series WP Binocular can be used with confidence in all weather and conditions. The large oversized 50mm (10X50, 12X50)/60MM (20X60) objectives are fully multicoated 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. 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.

Optical Performance

- 10x 12x 20x magnification

- BAK4 porro prism optical path

- Anti-reflection fully multi coated optics

- Use and Handling

Closed bridge configuration

- Large knurled centre focus wheel

- Right-eye diopter adjustment

- 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

- Nitrogen-filled, fogproof and submersible to 3.3' (1m)

- Internal focusing system helps to maintain waterproof seals

- Tripod mountable with optional adapter

Specifications:

- Prism Type: Porro

- Magnification: 10x 12x 20x

- Objective Lens Diameter: 50 mm/60 mm

- Angle of View:

5.0° (10x50)

4.2° (12x50)

2.2° (20x60)

- Field of View:

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:

117.3 Inches / 3 m (10x50)

117.3 Inches / 3 m (12x50)

58.2 Inches / 17.7 m (20x60)

Exit Pupil Diameter:

- 5.0 mm (10x50)

- 4.2 mm (12x50)

- 3.0 mm (20x60)

- Eye Relief: 20 mm / 21mm (20x60)

- Interpupillary Adjustment: Not Specified by Manufacturer

- Dioptric Correction: Not Specified by Manufacturer

- Focus Type: Center

- Tripod Mount: Yes (Adapter Optional)

- Dimensions:

7.2 x 7.0 x 3.1 Inches / 18.3 x 17.8 x 7.9 cm (10x50)

7.2 x 7.0 x 3.1 Inches / 18.3 x 17.8 x 7.9 cm (12x50)

8.8 x 7.7 x 3.4 Inches / 22.4 x 19.6 x 8.6 cm (20x60)

- Weight:

37.4 oz / 1060.3 g (10x50)

38.1 oz / 1080.1 g (12x50)

49.4 oz / 1400.5 g (20x60)

In the Box:

- Pentax 10x50/12x50/20x60 S-Series SP WP Binocular

- Neck Strap

- Carrying Case with Strap

- 2 x Objective Lens Caps

- 2 x Eyepiece Caps