Guide's TrackIR-series 400×300 thermal monocular with a 35 mm F1.2 lens, 1280×960 display and a swappable 18650 cell. Discontinued.
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Guide TK431 vs Lahoux Spotter 35
Two thermal monoculars compared on the makers' own figures. Rows in bold are where they differ; a dash means that maker does not publish the figure.
Dutch brand Lahoux's 384×288 Spotter with a 35 mm lens, 1280×960 display, video output and Wi-Fi; a 4–7 hour built-in battery.
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Specification side by side
| Guide TK431 | Lahoux Spotter 35 | |
|---|---|---|
| Technology | Thermal | Thermal |
| Sensor | 400×300 | 384×288 |
| Pixel pitch | 17 µm | 12 µm |
| NETD | ≤30 mK | ≤50 mK |
| Lens | 35 mm | 35 mm |
| Field of view | 11.1° | — |
| Display | FLCOS 1280x960 | 1280x960 |
| Recording | photo and video | photo and video |
| Wi-Fi / app | yes | yes |
| Battery life | up to 5 h | up to 4 h |
| Battery | removable 18650 Li-ion | built-in Li-ion |
| Weight | 485 g | — |
| Launched | 2022 | — |
| Digital zoom | — | up to 4x |
| Detection range | — | 1,361 m |
| Water resistance | — | IP66 |
Sources: Guide TK431 (spec page); Lahoux Spotter 35 (spec page). Detection ranges are for a 1.8 m object under each maker's own test conditions and are not directly comparable between brands.
Full pages: Guide TK431 · Lahoux Spotter 35 · all thermal monoculars in stock today
Specifications are the manufacturers' published figures. Prices are Amazon.co.uk at our last daily check. As an Amazon Associate we earn from qualifying purchases. More