PENTAX UP 8x25 WP Binocular Black PX61931

Compact porro-prism binoculars

The PENTAX UP 8x25 WP is a compact porro-prism binocular designed for general observation from the field to the theater. Its 8x magnification and 25 mm objective lenses suit users who want a lightweight optic for indoor or outdoor use. The uni-body construction locks the objective lenses in a single housing for enhanced durability.

Upgrade from smaller compacts

Moving up from 21 mm models such as the UP 8x21 or UP 10x21 gives a larger exit pupil and brighter image in lower light. The jump is worth it when you need better twilight performance without the bulk of full-size binoculars. The synchronized dual-axis eyepiece adjustment also speeds focusing compared to independent diopter rings.

25 mm objective capacity

The 25 mm apertures comfortably handle daylight and dusk viewing, delivering edge-to-edge sharpness through aspherical lens elements. Fully multi-coated surfaces maximize light transmission and minimize internal glare. Light-gathering runs out in deep darkness, so the optic is not suited for night-time astronomy or very low-light surveillance.