Fujinon 25x150 EM-SX

• 150 mm objective lenses: The large aperture gathers far more light than conventional field binoculars, which helps the Fujinon 25x150 EM-SX deliver a brighter, more usable image for astronomy, coastal observation, and long-distance surveillance in dusk and night conditions.
• 25x magnification with 45° eyepiece design: This model combines long-range reach with a more natural viewing angle, making extended observation sessions more comfortable when scanning elevated targets or the night sky.
• ED optical design: The EM-SX version uses special ED lenses to reduce color fringing at high magnification, so fine detail stays cleaner and easier to distinguish against bright stars, water reflections, or high-contrast backgrounds.
• EBC multi-coating: Fujinon's coating system improves light transmission and contrast, helping the binocular maintain sharp, high-resolution viewing across the field instead of producing a flat or washed-out image.
• Waterproof, fogproof construction: The airtight, nitrogen-filled housing resists internal fogging and supports reliable use in damp, cold, or marine environments where large observation binoculars are often exposed to rapid weather changes.

About the LB150 Series

The LB150 Series sits at the large-aperture end of the FUJINON binocular range and is built for users who need more light-gathering power and longer observation reach than standard handheld binoculars can provide. This series is aimed at demanding applications such as astronomy, marine and coastal observation, and fixed-position long-range surveillance, where image brightness and sustained viewing comfort matter more than portability.

Across the series, the defining feature is the use of 150 mm objective lenses, paired with Fujinon's EBC multi-coating to maintain strong contrast and a sharp image throughout the field. The LB150 family is designed as a mounted binocular platform rather than a casual carry optic, which reflects its emphasis on stability, low-light performance, and long-duration observation. Depending on the model, the series includes straight-through and angled eyepiece configurations, while selected versions add ED glass to control chromatic aberration at high magnification. The mechanical design also reflects field use in exposed environments, with waterproof, corrosion-resistant construction and a temperature-tolerant housing suited to marine and outdoor observation posts.

About the Fujinon 25x150 EM-SX

The Fujinon 25x150 EM-SX is a specialist large binocular for users who need a stable, high-magnification view with the comfort advantages of an angled 45° eyepiece. That layout makes a real difference in astronomy and elevated-target observation, because it reduces neck strain and allows a more natural posture during long sessions. At the same time, the 25x magnification gives enough reach for detailed viewing over very long distances without becoming as demanding to use as ultra-high-power systems.

The optical system is built around 150.00 mm objectives and a 6.00 mm exit pupil, a combination that favors bright viewing in low light and helps the binocular remain effective at dusk, at sea, or under dark skies. The EM-SX version also uses special ED lenses, which reduce color aberration and keep high-contrast detail cleaner at this magnification. Combined with the fully multicoated optics, that translates into a sharper, higher-contrast image that is easier to read when observing stars, vessels, shorelines, or distant terrain.

In practical use, the 47.00 m/1000m field of view gives enough width for scanning while still preserving the detail expected from a 25x binocular. The long 18.60 mm eye relief improves viewing comfort, especially for eyeglass wearers, and the sealed, nitrogen-filled body supports dependable use in wet and temperature-changing conditions. With its large format and substantial weight, this is a mounted observation instrument designed for deliberate, extended viewing rather than mobile use.

About Fujinon

Fuji Photo Film Co., Ltd. was established in Japan on January 20, 1934, and began production at its Ashigara Factory in Kanagawa Prefecture the following month. Fuji Photo Optical Co., Ltd. followed in 1944, and FUJINON binocular production began in 1947 with the 6×25 Meibo series. That long manufacturing history helps explain why Fujinon remains closely associated with precision optical products.

Today, Fujifilm's optical-device business covers binoculars as well as lenses for broadcast, cinema, videography, CCTV, and industrial applications. The brand's experience across these fields is reflected in its binocular design, where durability, optical consistency, and coating technology are central priorities. FUJINON binocular families include the MT and FMT series, along with Mariner, Polaris, and TECHNO-STABI models, showing a range that spans marine, astronomical, and stabilized observation use.

Main Features

• Product type: Binoculars
• Magnification: 25.00 x
• Objective lens diameter: 150.00 mm
• Prism type: Roof - Schmidt/Pechan
• Field of view at 1000 m: 47.00 m/1000m
• Field of view: 2.69 °
• Exit pupil: 6.00 mm
• Eye relief: 18.60 mm
• Twilight factor: 61.24
• Relative brightness: 36
• Lens coating: Fully Multicoated
• Focusing system: Central
• Body type: Single hinge
• Length: 962.00 mm
• Width: 365.00 mm
• Height: 193.00 mm
• Weight: 18461.00 g
• Nitrogen filled: Yes
• Waterproof: Yes
• Fogproof: Yes
• Made in: Japan

Warranty

Fujinon provides a 2-year warranty for this binocular. This period covers the product for a clearly stated term and suits the long-service, mounted observation role of the 25x150 EM-SX.

In the Box

• Objective lens cap
• Winged eyecup