Pentax Binoculars ZD 10x50 ED (53137)

The Pentax ZD 10x50 ED binoculars are a top-tier model in the Pentax Z-Series, designed for users who expect exceptional image quality and rugged reliability. These binoculars combine ED (extra-low dispersion) glass, fully multi-coated optics, and phase-corrected BaK-4 prisms to provide bright, sharp, and high-contrast images with true-to-life color. The large 50mm objective lenses ensure excellent light gathering, making them especially effective in low-light conditions such as dawn, dusk, or for astronomical viewing. The robust magnesium alloy body is waterproof and nitrogen-filled for fogproof performance, with thick rubber armoring for a secure grip and protection against impacts. A hydrophobic nano-coating on all exposed lens surfaces repels water, oil, dust, and dirt, ensuring clear views in any weather.

Optical Features:
Magnification: 10x
Objective lens diameter: 50 mm
Exit pupil: 5.0 mm
Eye relief: 22 mm (comfortable for eyeglass wearers)
ED glass elements to minimize chromatic aberration
Phase-corrected BaK-4 roof prisms for high contrast and resolution
Fully multi-coated optics and enhanced light transmission coatings for maximum brightness and color accuracy
Hydrophobic nano-coating on all exposed lens surfaces

Design and Construction:
Type of build: Roof prism
Central focusing system
Rotatable twist-up eyecups
Diopter adjustment on the right side
Magnesium alloy chassis for durability and reduced weight
Rubber armoring for impact resistance and a non-slip grip
Waterproof and nitrogen-filled (JIS Class 6, submersible up to 1 meter)
Threaded tripod connector for stable, hands-free viewing
Includes carrying case, neck strap, lens covers, and eyepiece caps

Field Performance:
True field of view: 5.0°
Field of view at 1,000 m: 87 m
Close focus limit: 3.5 m
Relative brightness: 25.0
Twilight factor: 22.4
Dimensions: 170 mm (length) x 132 mm (width) x 59 mm (height)
Weight: 855 g
Color: Black
Series: ZD

Recommended Uses:
Astronomy: Good
Bird watching: Moderate
Hunting: Good (all-rounder)
Travel and sports: Moderate
Sailing: Moderate
Theatre: Not recommended

These binoculars are ideal for anyone who needs reliable performance and outstanding optical clarity in challenging environments, making them a strong choice for astronomy, hunting, wildlife observation, and demanding outdoor activities.