Thermal Observation with Integrated Distance Measurement
The Guide TD635LS 35mm thermal monocular is part of the TD Gen3 LRF series. This handheld thermal spotter combines thermal observation and a built-in laser rangefinder for hunting, wildlife and nature observation. The rangefinder measures distances up to 1200m, while thermal detection extends up to 1800m.
The 35mm F1.0 objective provides a 12.5° × 9.4° field of view, covering 22 × 17m at 100m. A 2.03–16.24× magnification range supports changing the displayed scale during observation. Thermal detection and laser ranging are separate functions with different stated distances.
ApexVision Imaging and AMOLED Display
ApexVision S1 brings together the ApexCore S1 detector, Nexus 1.0 platform and Hyper-Light 2.0 algorithm. The uncooled VOx infrared sensor resolves 640 × 512 pixels at a 12µm pitch, with 15mK NETD and a 50Hz frame rate.
View thermal imagery on a 0.49-inch AMOLED display at 1440 × 1080 resolution. Seven colour palettes provide alternative ways to present the scene. The eyepiece offers 20mm eye relief and dioptre adjustment from -6 to +6.
Handling Battery Power and Outdoor Protection
The symmetrical body supports handling with either hand, and the physical focus roller allows one-handed manual focusing. The TD635LS weighs 374g and measures 171 × 54 × 74mm.
One replaceable 18650 battery powers the TD635LS for up to 10 hours. Two 18650 batteries and a battery charger are supplied for battery rotation between sessions. The housing is IP67 rated, with an operating temperature range of -20°C to +50°C.
Recording Storage and Wireless Connectivity
Capture photos and video with audio to 64GB internal storage. Wi-Fi supports 2.4GHz and 5GHz connections, alongside Bluetooth. USB-C supports an external power supply and USB 2.0 connectivity.
Technical Specifications
| Specification |
Value |
| Brand |
Guide Outdoor |
| Series |
TD Gen3 LRF |
| Model |
TD635LS |
| Product type |
Handheld thermal imaging monocular with laser rangefinder |
| Thermal imaging system |
ApexVision S1 |
| Core components |
ApexCore S1 detector; Nexus 1.0 platform; Hyper-Light 2.0 algorithm |
| Detector |
Uncooled VOx infrared detector |
| Spectral range |
8–14µm |
| Sensor resolution |
640 × 512 pixels |
| Pixel pitch |
12µm |
| Thermal sensitivity NETD |
15mK |
| Frame rate |
50Hz |
| Objective lens |
35mm F1.0 |
| Magnification |
2.03–16.24× |
| Field of view |
12.5° × 9.4° |
| Linear field of view |
22 × 17m at 100m |
| Thermal detection range |
Up to 1800m |
| Laser rangefinder |
Up to 1200m |
| Focus |
Manual focus roller |
| Display |
0.49-inch AMOLED; 1440 × 1080 pixels |
| Colour palettes |
White Hot, Black Hot, Amber Sepia, Red Hot, Iron Red, Blue Hot, Green Hot |
| Eye relief |
20mm |
| Dioptre adjustment |
-6 to +6 |
| Recording |
Photo and video with audio |
| Internal storage |
64GB |
| Wi-Fi |
2.4GHz and 5GHz |
| Other wireless connectivity |
Bluetooth |
| Interface |
USB-C power supply and USB 2.0 |
| Battery |
One replaceable 18650 battery |
| Operating time |
Up to 10 hours |
| IP rating |
IP67 |
| Operating temperature |
-20°C to +50°C |
| Weight |
374g |
| Dimensions |
171 × 54 × 74mm |
Use and Care
- Fit a compatible 18650 battery, start the monocular and set the eyepiece dioptre for your eyesight. Use the focus roller to adjust the observed scene.
- Select a colour palette and magnification for the observation. Use the built-in laser rangefinder for distance measurement within its stated 1200m range.
- Use photo or video recording to save observations to internal storage. USB-C supports external power and USB 2.0 connectivity.
- Use the supplied straps and carry bag for handling and transport. Follow the quick start guide for care and operate within -20°C to +50°C.
Package Contents
Guide TD635LS device; Hand strap; Neck strap; Carry bag; Lint-free cloth; Battery charger; Two 18650 batteries; 5V 2A adapter; USB-A to USB-C cable; Quick start guide; Warranty card.
Frequently Asked Questions
What is the difference between detection and ranging distance
The TD635LS has a thermal detection range of up to 1800m. Its built-in laser rangefinder measures distances up to 1200m. These are separate functions.
Which lens and magnification does the TD635LS have
It uses a 35mm F1.0 objective with manual focus and 2.03–16.24× magnification. The field of view is 12.5° × 9.4°, equivalent to 22 × 17m at 100m.
What display and storage are fitted
The TD635LS has a 0.49-inch 1440 × 1080 AMOLED display and 64GB internal storage for photos and video with audio.
Which battery does the monocular use
It operates with one replaceable 18650 battery and has an operating time of up to 10 hours. Two 18650 batteries and a battery charger are supplied.
Can it be focused with either hand
Yes. Its symmetrical housing supports left- or right-handed handling, and the physical focus roller supports one-handed manual focusing.
