Guide's entry 256×192 thermal with a 10 mm lens and 17.5° field of view, an 8-hour swappable cell and a 200 m laser pointer; 25 Hz.
£549.00cheapest tracked listing
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Guide TD210 vs Guide TK431
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.
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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Specification side by side
| Guide TD210 | Guide TK431 | |
|---|---|---|
| Technology | Thermal | Thermal |
| Sensor | 256×192 | 400×300 |
| Pixel pitch | 12 µm | 17 µm |
| NETD | ≤50 mK | ≤30 mK |
| Lens | 10 mm | 35 mm |
| Magnification | 1.8–3.6x | — |
| Digital zoom | up to 2x | — |
| Detection range | 400 m | — |
| Field of view | 17.5° | 11.1° |
| Display | LCOS 1280x960 | FLCOS 1280x960 |
| Recording | photo and video | photo and video |
| Wi-Fi / app | yes | yes |
| Battery life | up to 8 h | up to 5 h |
| Battery | removable 18650 Li-ion | removable 18650 Li-ion |
| Weight | 360 g | 485 g |
| Launched | — | 2022 |
Sources: Guide TD210 (spec page); Guide TK431 (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 TD210 · Guide TK431 · 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