Fujinon 40x150 ED-SX

• 40x magnification with 150 mm objectives: this combination is built for very distant subjects, giving the image scale needed for long-range terrestrial observation, maritime use, and astronomy while the large objectives keep the view bright.
• ED objective lenses: extra-low dispersion glass reduces chromatic aberration, which matters especially at 40x where color fringing and loss of fine detail become more obvious.
• EBC fully multicoated optics: Fujinon's coating system improves light transmission and contrast, helping the binocular deliver a cleaner, more defined image in low-light and night-time viewing.
• Waterproof, fogproof construction: the sealed, nitrogen-filled housing resists internal fogging and supports reliable use in damp, cold, or marine environments.
• Large-body observation design: the substantial housing and central focusing layout are intended for mounted use, giving the stability needed to make high magnification practical over long observation sessions.

About the LB150 Series

The Fujinon LB150 Series sits in the brand's large-format binocular range for users who need more reach and light-gathering power than conventional field binoculars can provide. This series is aimed at long-range observation in maritime, industrial, surveillance, and astronomical roles, where image scale, brightness, and durability matter more than compactness. Across the range, the defining feature is the use of 150 mm objective lenses, which collect enough light to keep the image usable at dusk, at night, and when observing faint or distant targets.

LB150 models are also known for their emphasis on optical control at high magnification. Fujinon pairs the large objectives with EBC multicoating for improved transmission and contrast, while selected models in the series use ED glass to reduce color fringing and preserve detail. The mechanical design follows a practical, heavy-duty approach with a sealed body, resistance to harsh weather, and a format intended for dedicated mounts and tripods. In use, the series is less about portability and more about delivering a stable, bright, high-resolution view where ordinary binoculars run out of optical performance.

About the Fujinon 40x150 ED-SX

The Fujinon 40x150 ED-SX is the highest-magnification model in the LB150 family, built for applications where distant detail must be enlarged as much as possible without moving to a telescope-style system. Its 40x magnification gives clear practical advantages for coastal observation, ship identification, fixed-position surveillance, and astronomy, where a larger image scale helps separate fine structure that would be difficult to resolve at lower power. To support that magnification, the binocular uses 150 mm objective lenses, which gather enough light to maintain image brightness and preserve contrast in twilight and night-time conditions.

This model stands out within the series through its ED lenses, which reduce chromatic aberration that becomes more noticeable at high power. In practice, that means cleaner edges around bright subjects, better control of false color, and a more precise image when observing high-contrast scenes such as vessels against reflective water or bright celestial objects against a dark sky. The fully multicoated optics further support image clarity by improving transmission and helping the binocular deliver a crisp, high-contrast view across its narrow but purpose-built field.

Mechanically, the 40x150 ED-SX is designed as a mounted observation instrument rather than a handheld binocular. Its 18,500 g body provides the scale and rigidity needed for this class of optics, while the waterproof, fogproof, nitrogen-filled construction supports dependable use in exposed environments. With 15.00 mm eye relief and a central focusing system, it balances high-magnification performance with practical day-to-day usability for extended observation sessions.

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. The FUJINON name is closely tied to Fujifilm's long-standing optics business, with roots in optical glass production at the Odawara Factory in 1940. FUJINON binocular production began in 1947 with the 6×25 Meibo series, and the brand later expanded into a broad optical-device portfolio.

Today, Fujinon is known for making optics not only for binoculars, but also for broadcast, cinema, videography, CCTV, and industrial applications. That wider experience shows in the brand's approach to binocular design, where optical precision, coating technology, and mechanical durability are treated as core requirements. Within the binocular segment, FUJINON has developed established product families such as the MT and FMT series, alongside Mariner, Polaris, and TECHNO-STABI models.

Main Features

• Magnification: 40.00 x
• Objective lens diameter: 150.00 mm
• Prism type: Roof - Schmidt/Pechan
• Field of view at 1000 m: 29.93 m/1000m
• Field of view: 1.71 °
• Exit pupil: 3.80 mm
• Eye relief: 15.00 mm
• Lens coating: Fully Multicoated
• Focusing system: Central
• Nitrogen filled: Yes
• Waterproof: Yes
• Fogproof: Yes
• Length: 962.00 mm
• Width: 365.00 mm
• Height: 193.00 mm
• Weight: 18500.00 g
• 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 a specialist optical instrument intended for demanding long-range observation use.

In the Box

• Objective lens cap
• Winged eyecup