The ThermTec Ventus 335L Multi-Spectrum Binoculars combine uncooled thermal imaging, daytime 4K optical viewing, digital night vision, and an integrated laser rangefinder into a single observation platform. Built with an IP67-rated housing measuring 164 mm × 127 mm × 73 mm and weighing approximately 825 g, the device provides heat-signature detection up to 1,800 m alongside detailed digital identification on a 1600 × 1200 AMOLED display. The binocular runs on two removable 18650 Li-ion cells for up to 7 hours of continuous operation and mounts to standard field supports via a threaded 1/4"-20 tripod socket.

Key Features

• Multi-Channel Sensor System: Utilises a 384 × 288 thermal sensor with a sub-15 mK NETD alongside a 3840 × 2160 (4K) CMOS sensor for daylight and low-light identification.
• Dual-Band IR Illumination: Features an integrated infrared illuminator switchable between 850 nm and 940 nm wavelengths for active night vision viewing.
• Built-In Laser Rangefinder: Accurately measures target distances out to 1,000 m directly within the observation display.
• Image Blending and Display Modes: Supports Picture-in-Picture (PiP) hybrid blending, 6 thermal colour palettes, and AI Pro Zoom for edge enhancement.
• Internal Recording and Connectivity: Includes 64 GB of internal memory for video and photo capture, backed by integrated Wi-Fi for mobile streaming.
• Swappable Power Architecture: Powered by dual removable 18650 lithium-ion batteries rechargeable via external charging cradles or onboard 5V USB-C.

Technical Specifications

• Thermal Sensor: 384 × 288 uncooled VOx, 12 µm pixel pitch
• Thermal Sensitivity: NETD < 15 mK (@300K)
• Thermal Optics: 35 mm objective lens, f/0.9 aperture
• Optical Magnification: 4.3× base optical thermal magnification
• Field of View: 13.2 m at 100 m (thermal); 15.4 m at 100 m (optical)
• Digital Sensor: 4K CMOS (3840 × 2160 pixels)
• Display: 1600 × 1200 AMOLED
• Laser Rangefinder Range: Up to 1,000 m
• Detection Range: Up to 1,800 m (standard heat signatures)
• Storage: 64 GB internal memory
• Ingress Protection: IP67
• Dimensions: 164 mm × 127 mm × 73 mm
• Weight: ~825 g
• Mount Interface: Standard 1/4"-20 tripod thread

Who is the ThermTec Ventus 335L Multi-Spectrum Binoculars for?

• Feral pest eradication hunters — targeting pigs, wild dogs, and deer rely on this multi-spectrum binocular for its 384 × 288 thermal sensor with sub-15 mK NETD and 35 mm f/0.9 lens, which resolves animal heat signatures across paddocks before ranging target distances out to 1,000 m with the onboard LRF.
• Rural property owners — conducting boundary security and asset surveillance benefit from this multi-spectrum binocular's combination of 4.3× base optical thermal magnification for scanning fence lines and a 3840 × 2160 4K CMOS sensor for positive daytime and low-light visual identification.
• Search-and-rescue operators — navigating low-visibility terrain utilize this multi-spectrum binocular to rapidly locate lost persons via heat contrast up to 1,800 m, immediately switching to optical night vision while managing prolonged field deployments using swappable dual 18650 Li-ion batteries inside an 825 g chassis.

Less suitable for: Positive identification beyond 1,800 m, which requires higher-resolution 640×512 multi-spectrum binoculars with 50 mm lenses; tight-cover tracking in dense scrub, where wide-angle monoculars with lower base optical magnifications (1× to 2×) offer a broader field of view; or dynamic shooting setups, which require recoil-rated dedicated thermal riflescopes rather than handheld observation optics lacking Picatinny mounts.