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Ferolix STT-8x42ED 8×42 ED Laser Rangefinder Binoculars | Raised-Back Roof Prism

Ferolix STT-8x42ED 8×42 ED Laser Rangefinder Binoculars | Raised-Back Roof Prism

    Ferolix STT-8x42ED 8×42 ED Laser Rangefinder Binoculars | Raised-Back Roof Prism

    The Ferolix STT-8x42ED is an 8×42 ED laser rangefinder binocular designed for long-distance outdoor observation and field measurement. It combines high-definition binocular optics with an integrated 905nm Class 1 laser rangefinder, providing clear daylight viewing and fast distance measurement in one compact optical system. The raised-back roof prism design, 42mm objective lenses and ED optical configuration provide a practical balance of optical performance, ranging capability and portability. The system supports distance, continuous SCAN, angle, horizontal distance and two-point height meas...
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Laser Rangefinder Binoculars

8×42 ED Binoculars

Long Range Laser Rangefinder Binoculars

STT-8x42ED

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ED Rangefinder Binoculars

ED Rangefinder Binoculars

8x42 rangefinder binoculars

ED binoculars

field survey optics OEM

laser range finder binoculars

Product Details

8×42 ED Optical System

The STT-8x42ED combines 8× magnification with 42mm Objective Lenses and an ED objective configuration. The optical system uses roof prisms with phase and dielectric coatings, together with FMC broadband multilayer anti-reflection coatings.

Optical transmission is ≥87%, with a 6.1° field of view and 21.1mm eye relief, supporting comfortable viewing during extended Outdoor Observation.

Integrated Laser Rangefinder

A 905nm semiconductor laser with Class 1 eye-safe laser classification is integrated into the binocular optical system. Depending on configuration, the ranging range can be 5–1500m, 5–1800m or 5–2400m.

Ranging accuracy is specified as ±0.5m + 1‰, with measurement time ≤0.3 seconds under high-reflection target conditions.

Multiple Measurement Modes

The rangefinder supports ordinary Distance Measurement, continuous SCAN, two-point height measurement, angle measurement and horizontal distance measurement.

Built-in processing algorithms support multi-point averaging, distance gating and interference filtering.

Durable Outdoor Construction

The housing combines a magnesium alloy body with modified PVC rubber. The binocular is designed for demanding outdoor environments and is specified with IP67/IP65 protection.

Dimensions are approximately 146 × 111 × 51mm, with a weight of about 800g for the raised-back version. A 1/4"-20 tripod interface is available as an option.

Key Specifications

SpecificationSTT-8x42ED
Magnification8×
Objective Diameter42mm
Objective ConfigurationED
Field of View6.1°
FOV at 1000m106.6m
Exit Pupil5.25mm
Eye Relief21.1mm
Optical Transmission≥87%
Prism TypeRoof Prism
Laser Wavelength905nm
Laser ClassClass 1
Ranging Options5–1500m / 5–1800m / 5–2400m
Ranging Accuracy±0.5m + 1‰
Measurement Time≤0.3s under high-reflection conditions
Measurement ModesDistance / SCAN / Height / Angle / Horizontal Distance
ProtectionIP67/IP65
Dimensions146 × 111 × 51mm
WeightApprox. 800g
Operating Temperature-20°C to +50°C


What are 8×42 Laser Rangefinder Binoculars?
They combine conventional binocular observation with an integrated Laser Rangefinder. The 8×42 configuration provides 8× magnification and 42mm Objective Lenses, while the laser module measures target distance.

What is the advantage of the ED configuration?
The STT-8x42ED uses an ED objective configuration. It is designed as the higher optical configuration within this 8×42 product family.

How far can the STT-8x42ED measure?
Depending on the selected configuration, the specified ranging distance is up to 1500m, 1800m or 2400m.

B2B & OEM/ODM

Ferolix supports distributors, importers and optical brands with factory-direct manufacturing and OEM/ODM services.

Customization options can include product configuration, logo customization, packaging and product development according to project requirements.


8×42 / 10×42 rangefinder binoculars Model Selection Table
Both models share the same 42mm objective, ranging module, body and accessories. The only differences are magnification, exit pupil and eye relief — choose by how you use it.
Specification
8×42
10×42
Magnification
8×
10×
42mm (ED or Standard objective, optional)
Exit Pupil
5.25mm (brighter in low light)
4.25mm (standard daylight)
Eye Relief
21.1mm (comfortable with glasses)
15.1mm
Field of View
6.1° (106.6m @ 1000m / 319.6ft @ 1000yds)
Resolution
4.2″ center field
Light Transmission
T ≥ 87%
Prism / Coating
Roof prism, phase + dielectric coating; FMC broadband multi-layer
Diopter
±5D
Ranging
Class 1, 905nm; 5–1500 / 5–1800 / 5–2400m; accuracy ±0.5m + 1‰; ≤0.3s
Modes
Single / SCAN / Height / Angle / Horizontal Distance
Display
160-segment monochrome LCD
Battery
CR2 (3V) or built-in rechargeable Li-poly; ~10,000 continuous readings
Body
Magnesium alloy + rubber armor; IP67/IP65; flat or raised rear cover
Dimensions / Weight
146 × 111 × 51 mm; 790g (flat) / 800g (raised)
Operating Temp
−20°C ~ +50°C
Best For
Low-light, wide scanning, handheld, eyeglass wearers
Open terrain, long-range detail identification



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