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Like with any other binoculars, what we want to be looking for amongst the specification is the magnification provided. Thermal binoculars obviously also comprise thermal sensors, so we might also want to take a cursory glance at the thermal resolution of said sensor and, as we’re destined to be using binoculars outdoors in the main, also its operating temperature if given and detection range.
The detection range is related to the resolution of the thermal sensor; the higher the resolution, the further it can detect. Generally speaking, because we’re looking to pick out and identify subjects that we might not be able to spot with the naked eye if viewing at night, thermal binoculars offer a wide or large field of view, so as to give us a better opportunity for observation.
Because these are very much specialist tools, tracking down these thermal imaging products may be less easy than finding your common-or-garden optical binocular, while choice and popularity seems to be greater in the USA than elsewhere. But, thanks to the Internet, we live in a global market, so snagging your thermal imaging binocular of choice is often only a few clicks away…