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The Guide TD435LS Thermal Monocular has been upgraded with the latest ApexVision technology from Guide Sensmart. Equipped with a highly sensitive 400 × 300 @12μm thermal detector with an impressive NETD of <15mK, it provides clear thermal imagery and enhanced target detection in challenging weather and low-visibility conditions.
Featuring an integrated 1200m laser rangefinder, the TD435LS allows users to accurately measure distances while maintaining a lightweight and ergonomic design. The intuitive focusing roller enables smooth one-handed operation, while the symmetrical housing ensures comfortable use with either hand.
Combining advanced thermal performance, long battery life, laser rangefinding capability, and a compact form factor, the Guide TD435LS LRF is an ideal solution for wildlife observation, pest control, search and rescue, security applications, and general outdoor exploration.
🗸 COMPLETE APEXVISION S1 SYSTEM ARCHITECTURE
The TD435LS is powered by Guide’s next-generation thermal imaging solution. ApexVision redefines the infrared core of outdoor optics from the ground up – engineered for any condition, it delivers ultra-clear visuals with smooth, ghost-free motion, high-fidelity imaging and razor-sharp detail at long range.
🗸 HIGHLY-SENSITIVE <15MK NETD
The Guide TD435LS feautres an ultra-sensitive ≤15mK NETD thermal sensor that delivers exceptional image clarity and enhanced target recognition, revealing finer details even in challenging weather and low thermal contrast conditions.
🗸 BUILT-IN 1200M LASER RANGEFINDER
The integrated 1200m laser rangefinder provides fast and accurate distance measurements, seamlessly built into the compact housing for enhanced portability and field performance.
🗸 EXTENDED BATTERY LIFE
During observation, exploration and stalking in the field, the Guide TD435LS offers an impressive 12-hour runtime. The replaceable 18650 battery supports blind installation in the dark, with no need to distinguish between the positive and negative terminals.
| Specifications | |
|---|---|
| Sensor | |
| Core Technology Item | ApexVision S1 Architecture |
| Type | Uncooled VOx Thermal Detector, 12μm |
| Resolution | 400×300 |
| NETD | ≤15mK |
| Frame Rate | 50Hz |
| Lens | |
| Objective Lens | 35mm F1.0 |
| Field of View | 7.9° × 5.9° |
| FOV @100m | 14m |
| Magnification | 3.2× – 12.8× |
| Detection Range | 1800m |
| Focus | Manual |
| Display | |
| Display Type | 0.49” AMOLED 1440×1080 |
| Colour Palettes | White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot, Sepia |
| Eyepiece | Eye relief: 20mm; Diopter: -6 to +6; Zoom: 13.8x |
| Hardware | |
| Laser Rangefinder | 1200m |
| WiFi | 2.4G, 5G |
| Interface | USB-C |
| Other | Microphone, Bluetooth |
| System | |
| Recording | Photo / Video / Audio |
| Memory Capacity | 32GB |
| Power | |
| Battery Type | Single Replaceable 18650 |
| Operating Time | 10 Hours |
| Environmental | |
| Operating Temperature | -20°C to 50°C |
| Encapsulation | IP67 |
| Physical | |
| Weight | 374g |
| Size (mm/in) | 171×54×74/6.73×2.13×2.91 |
| Standard | Device, Lint-Free Cloth, Carry Bag, Accessory Bag, Hand Strap, Neck Strap, Eye Mask, Battery Charger, 18650 Battery ×2, 5V 2A Adapter (US, UK, Australia, and Europe), USB-A to USB-C Cable, Quick Start Guide, Warranty Card |
| Optional | Bluetooth Remote Control, 18650 Battery |



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