What level of zoom makes sense for thermal imaging devices?

In the case of digital zoom, unlike zoom via the focal length, the image is enlarged by multiplying the pixels. The larger the sensor, the more detailed the image, and the better the zoom. This means that it all depends on the relationship between the resolution and the sensor. The DTI 3, for example, has four zoom levels that are perfectly matched to the resolution and the 17-micron pixel pitch sensor to deliver detailed images. With its higher resolution of 640 x 480 and a pixel pitch of 12 microns, the DTI 6 even offers a 10-step digital zoom that makes specific details visible even at the highest level of magnification.
Basics of thermal imaging technology: www.zeiss.com/...