Pentax - 10x25 U-Series UP WP Compact Binoculars

Infographic: Pentax U Series Binoculars

Pentax's highly portable and functional 10x25 U-Series UP WP Compact Binoculars 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.

Christopher Witt

11 months ago

Todd Vorenkamp

5 years ago

Todd Vorenkamp

5 years ago

Christopher Witt

4 years ago

Joseph Albanese

5 years ago

User Manual

3.6 MB

Optical Performance

10x 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

262.5' 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, 2.5mm 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

• Pentax's highly portable and functional 10x25 U-Series UP WP Compact Binoculars 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.