Answer from Bering Optics:
In the Night Vision Industry, there is an unwritten rule to estimate recognition and detection ranges for the worst possible conditions and targets. For example, at night, the detection distance to a white target is always 2-3 times greater than the distance to a black target, but we always indicate the distance to the most difficult target of dark color, i.e. to the least noticeable one. These are the requirements of military customers.
There are no calculated distance standards in Thermal imaging. All the distances that Bering Optics uses are measured by us personally. It should be understood that, depending on the observation conditions and the size of the target, detection and recognition can be 2+ times better. It is my obligation to ensure Bering Optics customers that these distances are not WORSE than what we specify in our documents.
There are always companies that will inflate the numbers, but this is not the way in which I am going to develop my business. Perhaps this is not very profitable from a marketing point of view, but I know for sure that no one will say that Bering Optics cheated them.