Thermal Observation with a Manual Focus Lens
The Guide TE425S 25mm thermal monocular is a handheld thermal spotter for hunting, wildlife and nature observation. Its 25mm F0.9 objective provides a thermal detection range of up to 1300m, with manual focus for adjusting the observed scene.
The 11.0° × 8.2° field of view covers 19 × 14m at 100m. A 1.9–7.6× magnification range lets you change the displayed scale. At 320g and 157 × 51 × 47mm, the TE425S combines these functions in a compact handheld body with one-button control.
ApexVision Sensor 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 detector resolves 400 × 300 pixels at a 12µm pitch, with 15mK NETD and a 50Hz frame rate.
Thermal imagery appears on a 0.32-inch AMOLED display at 800 × 600 resolution. Seven colour palettes provide different ways to view the scene. The eyepiece offers 25mm eye relief and dioptre adjustment from -5 to +5.
Recording Storage and Wireless Connectivity
Capture photos and video with audio to 64GB internal storage. Wi-Fi supports both 2.4GHz and 5GHz connections, alongside Bluetooth. The USB-C interface handles charging, an external power supply and USB 2.0 connectivity.
Built In Power and Outdoor Protection
The built-in battery provides up to five hours of operation and supports 20W fast charging. A USB-C to USB-C cable is supplied, while a fast charging adapter is an optional accessory.
The housing is IP67 rated, with an operating temperature range of -20°C to +50°C. A wrist strap and carry bag are supplied for handling and transport between observation sessions.
Technical Specifications
| Specification |
Value |
| Brand |
Guide Outdoor |
| Series |
TE |
| Model |
TE425S |
| Product type |
Handheld thermal imaging monocular |
| 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 |
400 × 300 pixels |
| Pixel pitch |
12µm |
| Thermal sensitivity NETD |
15mK |
| Frame rate |
50Hz |
| Objective lens |
25mm F0.9 |
| Magnification |
1.9–7.6× |
| Field of view |
11.0° × 8.2° |
| Linear field of view |
19 × 14m at 100m |
| Thermal detection range |
Up to 1300m |
| Focus |
Manual |
| Display |
0.32-inch AMOLED; 800 × 600 pixels |
| Colour palettes |
White Hot, Black Hot, Amber Sepia, Red Hot, Iron Red, Blue Hot, Green Hot |
| Eye relief |
25mm |
| Dioptre adjustment |
-5 to +5 |
| Recording |
Photo and video with audio |
| Internal storage |
64GB |
| Wi-Fi |
2.4GHz and 5GHz |
| Other wireless connectivity |
Bluetooth |
| Interface |
USB-C charging, power supply and USB 2.0 |
| Battery |
Built-in |
| Operating time |
Up to 5 hours |
| Fast charging |
20W supported |
| IP rating |
IP67 |
| Operating temperature |
-20°C to +50°C |
| Weight |
320g |
| Dimensions |
157 × 51 × 47mm |
Use and Care
- Charge the built-in battery through USB-C before use. The supplied USB-C to USB-C cable can be used with a compatible power source; a fast charging adapter is optional.
- Set the eyepiece dioptre for your eyesight, then adjust the manual objective focus for the observation distance.
- Select a colour palette and magnification for the scene. Use photo or video recording to save observations to internal storage.
- Use the supplied wrist strap 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 TE425S device; Wrist strap; Carry bag; Lint-free cloth; USB-C to USB-C cable; Quick start guide; Warranty card.
Frequently Asked Questions
Does the TE425S have manual focus
Yes. Its 25mm F0.9 objective has manual focus. The eyepiece also has dioptre adjustment from -5 to +5.
What are its magnification and detection range
The TE425S provides 1.9–7.6× magnification and a stated thermal detection range of up to 1300m. Its field of view is 11.0° × 8.2°, covering 19 × 14m at 100m.
Can it record video with audio
Yes. It captures photos and video with audio and has 64GB internal storage.
How is the TE425S powered and charged
It has a built-in battery with up to five hours of operating time and supports 20W fast charging through USB-C. A USB-C to USB-C cable is supplied; a fast charging adapter is optional.
Which wireless connections are available
The TE425S supports 2.4GHz and 5GHz Wi-Fi as well as Bluetooth.
