Levenhuk Bruno PLUS 25x100 Binoculars (85539)

Levenhuk Bruno PLUS 25x100 Binoculars (85539)

The Levenhuk Bruno PLUS 25x100 binoculars are a powerful instrument designed for amateur astronomy and demanding observation of the night sky and distant landscapes. With significantly greater light-gathering capability than standard 50 mm models, they collect up to four times more light, making faint nebulae, galaxies, and globular clusters clearly visible. Even in low-light conditions, the image remains bright and sharp across the entire field of view. These binoculars perform equally well in rural dark-sky environments and during stationary observations from a balcony.

High-Aperture Optics for Bright, Detailed Views

The 25× magnification enables detailed study of extremely distant terrestrial and celestial objects. Large 100 mm objective lenses provide exceptional light power, ensuring high brightness and clarity. The optical system is built around BaK-4 Porro prisms and K9/F4 lenses with fully multi-layer anti-reflective coatings, delivering high light transmission and contrast.

A 4 mm exit pupil provides a balanced combination of magnification and aperture, maintaining image quality even after twilight when ambient light decreases. The binoculars produce clean, detail-rich views under darkening skies.

Durable and Weather-Resistant Construction

The aluminum alloy body is fully sealed to the IP67 standard and filled with nitrogen to prevent internal fogging during rapid temperature changes. The shock-resistant rubber coating improves grip and protects against impacts. The binoculars can withstand rain, temporary immersion in water, and challenging environmental conditions.

Fold-down rubber eyecups allow comfortable use with or without glasses. The ±4 diopter adjustment enables personalized focusing according to individual eyesight differences. Due to their size and magnification, tripod use is strongly recommended for stable and fatigue-free observation.

Tripod Compatibility and Safe Storage

A built-in 1/4" metal adapter allows quick and secure mounting on a standard tripod without additional accessories. A durable metal case is included for safe transport and storage. The tripod itself is not included and must be purchased separately.

Key Features

• 100 mm high-aperture objective lenses collect four times more light than standard 50 mm models

• 25× magnification for detailed study of distant landscapes and deep-sky objects

• BaK-4 Porro prisms with fully multi-coated optics

• Nitrogen-filled IP67-sealed body for protection against dust and water

• Built-in tripod adapter for easy mounting

• Durable metal case included for secure transport

Included in the Package

• Binoculars

• Protective caps for eyepieces and objective lenses

• Neck strap

• Cleaning cloth

• Metal storage case

• User manual and warranty slip

Specifications

• Product ID: 85539

• Brand: Levenhuk, Inc., USA

• Warranty: Lifetime

• EAN: 5905555025124

• Package size: 49 × 37 × 21 cm

• Shipping weight: 8.86 kg

Optical System

• Prism type: Porro

• Magnification: 25×

• Objective lens diameter: 100 mm

• Optical design: 6 elements in 4 groups

• Eyepieces: 4 elements in 3 groups

• Objectives: 2 elements in 1 group

• Optics material: BaK-4

• Lens coating: Fully multi-coated

• Prism coating: Fully multi-coated

• Exit pupil diameter: 4 mm

• Eye relief: 12 mm

• Twilight factor: 50

• Relative brightness: 16

• Resolution threshold: 2.5 arcseconds

• Field of view: 2.5°

• Field of view at 1000 m: 43.75 m

• Close focus distance: 30 m

Construction and Ergonomics

• Eyepiece diopter adjustment: ±4 diopters

• Interpupillary distance: 53–74 mm

• Focusing system: Individual for each eyepiece

• Eyecups: Fold-down rubber

• Body material: Aluminum alloy with rubber coating

• Body filling: Nitrogen

• Waterproof rating: IP67

• Hermetically sealed design

• Operating temperature range: −10°C to +53°C

• Tripod mounting: Yes (built-in 1/4" adapter)

• Application: Astronomical observation

• Carrying case included: Metal case