Pentax UP 8x25 WP Binoculars 61931

OVERVIEW

Pentax's highly portable and functional 8x25 U-Series UP WP Compact Binocular employs an innovative unibody design that locks the objective lenses into the body with the eyepieces set on a synchronized dual-axis mechanism that ensures they stay symmetrical in relation to the center axis of the optic when adjusting the interpupillary distance. The 25mm objective lenses are fully multicoated to reduce reflection and maximize light transmission to produce the brightest images possible. Aspherical lens elements virtually eliminate distortion, especially around the edges, and corrects for lens astigmatism which can prevent sharp focusing.

Designed for easy carrying and stowing, the binocular features a lightweight fiberglass reinforced polycarbonate housing that is corrosion and impact resistant. The housing material is also temperature-resistant allowing for its use in extreme climates while reducing expansion and contraction wide temperature variations can cause, which can make the optical components move out of collimation over time. Its optical tubes are nitrogen-filled and O-ring sealed so they can are submersible to 3.3', as well as fogproof in all weather conditions.

Optical Performance

8x magnification
25mm objective lenses
BAK4 porro-prism optical design
Aspherical lens elements reduce distortion at the edges and corrects for lens astigmatism which can prevent sharp focusing
Anti-reflection fully multicoated optics
5' field of view at 1000 yards
50° angle of view

Use and Handling

Dual-axis synchronized eyepiece adjustment ensures symmetrical placement when changing interpupillary distances
Knurled center focus wheel
Twist-up eyecups for use with or without eye wear
15mm eye relief, 3.1mm exit pupil
Standard 1/4"-20 tripod mount

Construction Details

Lightweight fiberglass reinforced polycarbonate housing
Housing is corrosion, temperature and impact-resistant
Nitrogen-filled for fogproof performance, submersible to 3.3' (1m)
Rubberized armoring protects against impacts and provides slip-resistant grip
Inner focusing mechanism provides smooth focus while preserving waterproof seals

SPECIFICATIONS

Prism Type	Porro
Magnification	8x
Objective Lens Diameter	25mm
Angle of View	6.2° (actual)
Field of View	325.5 @ 1000 yd / 108.5 m @ 1000 m
Minimum Focus Distance	40.6 / 12.4 m
Exit Pupil Diameter	3.1 mm
Eye Relief	15 mm
Focus Type	Center
Tripod Mount	Yes
Dimensions	4.6 x 4.3 x 2.7" / 11.7 x 10.9 x 6.9 cm
Weight	12.3 oz / 348.7 g

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