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Astronomical, water-resistant, nitrogen filled. Porro prisms. Magnification: 25x. Lens diameter: 100mm

Porro
Prisms of the binoculars adjust the image orientation projected by the objective
25
The higher the magnification of the binoculars is, the larger the object will be, but the narrower the field of view (FOV) and the darker the image
100
The larger the aperture is, the more light there will be that enters the optical tube and the image will be brighter, although a larger aperture will increase the size of the binoculars
Availability
Future arrivals
10 April 2026
20+
10 April 2026
20+

Product ID 85539
Brand Levenhuk, Inc., USA
Warranty lifetime
EAN 5905555025124
Package size (LxWxH) 49x37x21 cm
Shipping Weight 8.86 kg
Description

Levenhuk Bruno PLUS 25x100 Binoculars is a powerful tool created especially for astronomy at the amateur level and demanding observations of night sky and remote landscapes. The device collects 4 times more light than the classic 50mm models, allowing you to view in detail dim nebulae, galaxies, and globular clusters that remain unperceivable in conventional field devices. Even in low light conditions, the image is bright and crisp across the entire field of view. It makes the device equally effective for observations outside the city and stationary observations from the balcony.

The model provides a 25x magnification for the detailed examination of ultra-distant terrestrial and space objects. A pair of lenses with a diameter of 100mm provides the user with an exceptionally high light power for a bright and crisp image across the entire field of view. The optical design is based on Porro prisms of BaK-4 glass and K9/F4 fully multi-coated lenses that provide high light transmission. The exit pupil of 4mm indicates the optimal balance between magnification and high aperture. The user receives a high frequency and clean, detail-rich image even when the sky has already darkened and the luminous flux is noticeably reduced.

Aluminum alloy body is fully sealed according to the IP67 standard, nitrogen filled to prevent internal fogging and coated with shock-protective rubber. That is why the device can withstand rain, short-term immersion in water, sudden temperature changes, and occasional damage. Foldable eyecups make operation easier both in glasses and without them. Diopter adjustment +4D allows you to adjust the eyepieces in accordance with individual eyesight peculiarities. Taking into account considerable weight and high magnification, it is recommended to use the binoculars from a tripod. Built-in 1/4" metal adapter provides easy tripod mounting. Metal case ensures safe transportation and convenient storage of optics. The tripod is not included in the kit and is purchased separately.

Key features:

  • High aperture optical system with 100mm objective lenses collecting 4 times more light than standard 50mm models
  • 25x magnification for the detailed exploration of ultra-distant terrestrial objects, dim nebulae, and galaxies
  • Fully multi-coated Porro prisms of BaK-4 glass for high light transmission
  • Fully sealed nitrogen-filled IP67 body prevents internal fogging of optical elements and can withstand immersion in water
  • Built-in adapter for mounting on a standard tripod without using additional adapters
  • The kit includes a durable metal case for safe transportation and storage of the binoculars

The kit includes:

  • Binoculars
  • Eyepiece and objective lens protective caps
  • Strap
  • Cleaning wipe
  • Metal case
  • User manual and warranty slip
Specifications
Product ID 85539
Brand Levenhuk, Inc., USA
Warranty lifetime
EAN 5905555025124
Package size (LxWxH) 49x37x21 cm
Shipping Weight 8.86 kg
Prism type Porro
Magnification, x 25
Objective lens diameter (aperture), mm 100
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
Prisms coating fully multi-coated
Exit pupil diameter, mm 4
Eye relief, mm 12
Twilight factor 50
Relative brightness 16
Resolution threshold, arcseconds 2.5
Field of view, ° 2.5
Field of view, m/1000m 43.75
Close focus, m 30
Eyepiece diopter adjustment, diopters ±4
Interpupillary distance, mm 53 — 74
Focusing individual for each eyepiece
Eyecups fold-down, rubber
Body aluminum alloy, rubberized
Body filling nitrogen
Waterproof
Moisture resistance
Degree of moisture/water protection IP67, complete protection against dust and temporary immersion in water
Hermetically sealed design
Operating temperature range, °C -10...+53
Size classic
Application astronomical
Mounting on a tripod
Pouch/case/bag in set case