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Pentax's highly portable and functional U-Series UP 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.
Optical Performance
Use and Handling
Construction Details
Prism Type
Porro
Magnification
8x / 10x
Objective Lens Diameter
25 mm
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
Interpupillary Adjustment
Not Specified by Manufacturer
Dioptric Correction
Focus Type
Center
Tripod Mount
Yes
Pentax's highly portable and functional 8x25 U-Series UP 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.
10x
25mm
5.0° (actual)
262.5 @ 1000 yd / 87.5 m @ 1000 m
40.6 / 12.4 m
2.5 mm
Dimensions
4.5 x 4.3 x 2.2" / 11.4 x 10.9 x 5.6 cm
Weight
10.6 oz / 300.5 g
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