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 Leica Calonox 2 View
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.
Leica's current 640×480 thermal monocular: 42 mm F1.1 lens, 60 Hz, full-HD OLED display, 32 GB memory, IP67 and a nitrogen-filled body.
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Specification side by side
| Guide TK431 | Leica Calonox 2 View | |
|---|---|---|
| Technology | Thermal | Thermal |
| Sensor | 400×300 | 640×480 |
| Pixel pitch | 17 µm | 12 µm |
| NETD | ≤30 mK | ≤40 mK |
| Lens | 35 mm | 42 mm |
| Field of view | 11.1° | 10.3° |
| Display | FLCOS 1280x960 | OLED 1920x1080 |
| Recording | photo and video | photo and video |
| Wi-Fi / app | yes | yes |
| Battery life | up to 5 h | up to 8 h |
| Battery | removable 18650 Li-ion | built-in Li-ion (2x 2420 mAh) |
| Weight | 485 g | 657 g |
| Launched | 2022 | — |
| Magnification | — | 2.5–20x |
| Digital zoom | — | up to 8x |
| Detection range | — | 770 m |
| Water resistance | — | IP67 |
Sources: Guide TK431 (spec page); Leica Calonox 2 View (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 · Leica Calonox 2 View · 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